Authors:Alvin Kurniawan Santoso, Djoko Sulistyo, Ali Awaludin, Angga Fajar Setiawan, Iman Satyarno, Sidiq Purnomo, Ignatius Harry Pages: 19 - 30 Abstract: This study compares the influence of elastomeric rubber bearing (ERB) as the regular bearing support and lead rubber bearing (LRB) as the seismic isolation device on the seismic performance of a seven-span simply supported prestressed concrete (PSC) box girder bridge, which was analyzed using nonlinear time history analysis (NLTHA) with the OpenSees software. The results showed that the maximum pier responses and damage were smaller in models with LRB than with ERB. The bridge model using ERB occurred the slightest damage at levels II, while the one using LRB was at levels I. In addition, the highest seismic performance level in the model with ERB was at the operational limit. Meanwhile, the seismic performance in the model with LRB was at the fully operational limit. Thus, LRB was a good preference for improving the seismic performance and mitigating the damage due to the seismic excitation with a slender pier. PubDate: 2022-05-13 DOI: 10.9744/ced.24.1.19-30 Issue No:Vol. 24, No. 2 (2022)
Authors:Doddy Prayogo, Hasan Santoso, Franky Budiman, Marcellino Jason Pages: 31 - 37 Abstract: Determining the topology, layout, and size of structural elements is one of the most important aspects in designing steel seismic-resistant structures. Optimization of these parameters is beneficial to find the lightest weight of the structure, thus reducing construction cost. This study compares the performance of three metaheuristic algorithms, namely, Particle Swarm Optimization (PSO), Symbiotic Organisms Search (SOS), and Differential Evolution (DE). Three study cases are used in order to find the lightest structural weight without violating constraints based on SNI 1726:2019, SNI 1729:2020, and SNI 7860:2020. The results of this study show that SOS has better performance than other algorithms. PubDate: 2022-05-13 DOI: 10.9744/ced.24.1.31-37 Issue No:Vol. 24, No. 2 (2022)
Authors:Pamuda Pudjisuryadi, Benjamin Lumantarna, Fransisca Wijaya, C. Aphrodita, A. Jesica, Y. Karyanto, M.K. Theodora Pages: 46 - 53 Abstract: Modified-Partial Capacity Design (M-PCD) is proposed as one alternative of structural design methods. In M-PCD, the partial side sway mechanism where beams and some columns may develop plastic hinges. This method uses two structural models during the design process. The models are used to simulate undamaged and damaged structures when subjected to design earthquake (R=8.0) and larger target earthquake (R=1.6) respectively. In this study, 6- and 15-story square buildings with 30% and 50% elastic column are designed using M-PCD. Performances of the buildings are investigated by using non-linear time history analysis. Results show that the buildings’ performances are still unsatisfactory, especially for the 15-story buildings. However, it should be noted that the levels of earthquakes used for the analysis were larger than that used for the design. A more accurate prediction of the required strength should be developed further to improve M-PCD. PubDate: 2022-05-13 DOI: 10.9744/ced.24.1.46-53 Issue No:Vol. 24, No. 2 (2022)
Authors:Dario Rosidi Pages: 54 - 61 Abstract: Injection of fluid into subsurface geologic strata for geothermal energy, oil production, and waste disposal has been linked to induced seismic activity in the United States as well as in several other countries. According to the report of the National Research Council of United States of America thousands of induced earthquakes were reported at the numerous sites, where oil and gas recovery and waste disposal activities took place. Most of these induced earthquakes were small magnitude events (Moment Magnitude [Mw] < 4), although earthquakes of magnitude (Mw) 6.5 to 7 were also reported near the oil and gas production sites. This paper presents the results of a review of case histories on increased seismic events due to deep well injection (DWI) and oil extraction. Key factors that may lead or contribute to increased seismicity will also be discussed. PubDate: 2022-05-13 DOI: 10.9744/ced.24.1.54-61 Issue No:Vol. 24, No. 2 (2022)
Authors:Nicholas Hartono, Teuku Faisal Fathani Pages: 62 - 70 Abstract: Spatial analysis is performed to delineate liquefaction susceptibility zones at Yogyakarta International Airport(YIA). The low to medium cohesionless soil consistency is predominantly observed on the upper subsoil. A shallow groundwater level and low fines content have also enlarged the likelihood of earthquake-induced liquefaction. An SPT based liquefaction triggering procedure is adopted in this study to indicate the Factor of Safety (FoS) whereas the Liquefaction Severity Index (LSI) is used to measure the severity of liquefaction by presuming its manifestation. Inverse Distance Weighted (IDW) interpolation in QGIS is chosen to produce a map with 50 m × 50 m grid size. The analysis results show the YIA’s area is prone to undergo liquefaction at various depths. However, thin liquefied layers may not generate sufficient artesian flow pressure to eject water or sand. The LSI analysis concludes that YIA area is categorized as a non-liquefied to moderate severity where the West side is the governing area PubDate: 2022-05-13 DOI: 10.9744/ced.24.1.62-70 Issue No:Vol. 24, No. 2 (2022)
Authors:Brigitta Petra Kartika Narindri, Arief Setiawan Budi Nugroho, Akhmad Aminullah Pages: 71 - 84 Abstract: Building Information Modeling (BIM) and Geographic Information systems (GIS) are two digital system innovations advantageously applied in the Architecture, Engineering, Construction, and Operations (AECO) sectors. GIS and BIM integration development is indispensable in building and infrastructure management. This integration promises several benefits for the operational phase of buildings and infrastructures. However, it faces challenges in data transformation and collaboration. This study proposes a framework and model for a web-based building management platform. The framework is developed by transforming BIM data into the GIS environment using the latest technology from ArcGIS. It allows data-sharing and collaboration among stakeholders, help build management, and is valuable for decision-making. The stakeholders, who do not need a BIM-GIS expert, could virtually see the report and updates of this building model every time. PubDate: 2022-12-20 DOI: 10.9744/ced.24.2.71-84 Issue No:Vol. 24, No. 2 (2022)
Authors:Mahmud Kori Effendi, Ali Awaludin Pages: 85 - 92 Abstract: Laminated Veneer Lumber (LVL) is one of the engineered wood products consisting of wood veneers that are glued and pressed together. In this study, the behavior of LVL Sengon slender beam is numerically investigated by means of nonlinear finite element analysis (FEA), where only half of the experimental beam was modeled due to symmetry of the load configuration. The LVL Sengon wood material used Hill failure criterion with isotropic hardening rules, and its mechanical properties in both tension and compression are modelled according to its mechanical properties in tension obtained from the clear specimen test. The contact analysis is defined for each contacting and contacted elements. The FEA results well agreed with the experimental results in term of the load-deflection curve and failure mode of the beam. It is found that the lateral support has no effect on the stiffness of the beam. The beam stiffness and ultimate load increase by the increase of beam height-to-width ratio (Ć°Āāā/Ć°ĀāĀ). PubDate: 2022-12-20 DOI: 10.9744/ced.24.2.85-92 Issue No:Vol. 24, No. 2 (2022)
Authors:Andi Andi, Stephen Hans Sumali, Giovanni Ferdinand Limansantoso Pages: 93 - 100 Abstract: The importance of safety leadership for effective management of safety behavior has been acknowledged by many researches. However, its development in construction industry is lagging compared to other industry, especially in Indonesia. This research empirically evaluates the impact of contractors’ safety leadership on construction workers’ safety behavior. It explores three dimensions of safety leadership variable and two dimensions of safety behavior variable, and then examines the relationship between the two variables. Data was gathered through questionnaire survey to eighty-four workers from five on-going construction projects in Surabaya. Multiple regression analysis was performed to examine two models of the impact of safety leadership on safety behavior. The findings suggest that safety concern and safety motivation positively impact safety compliance and safety participation, whilst safety policy only have a significant positive impact on safety participation. The paper discusses these findings and their implications for shaping workers’ safety behavior in construction projects. PubDate: 2022-12-20 DOI: 10.9744/ced.24.2.93-100 Issue No:Vol. 24, No. 2 (2022)
Authors:Elshaan Helmmie, Tri Basuki Joewono Pages: 101 - 108 Abstract: Understanding mechanism of users in responding determinant variables to use mode of transport is beneficial to anticipate the effect of policy. This study aims to identify the elasticity value of travel time and travel cost of the users of private vehicles and public transportation. Using data from users of private vehicles and public transport in Bandung, Indonesia, the elasticity of travel time and travel cost was calculated based on estimated multinomial logit model (MNL) logit. The elasticity was calculated based on gasoline prices, parking fees, transfer fees, access times, travel times, and waiting times. Based on the results of the elasticity values for travel attribute, it was found that in access time and travel time, Trans Metro Bandung (TMB) Bus had the largest elasticity of -0,564 and -5,001, respectively, so TMB Bus was the most sensitive to changes in access time and travel time. In terms of waiting times and fixed costs/gasoline, conventional taxi has the highest elasticity values of -2,630 and -1,604, respectively, so conventional taxi is the most sensitive to changes in waiting time and fixed costs/gasoline. PubDate: 2022-12-20 DOI: 10.9744/ced.24.2.101-108 Issue No:Vol. 24, No. 2 (2022)
Authors:Adekemi Loretta AYODELE, Abideen Morakinyo Akinniyi, Adeoluwa Peter Gbolade, Adeyemi Timilehin Adetokunbo Pages: 115 - 124 Abstract: This study investigated the effect of alkaline activation on the properties of Phosphoric Acid (PA) stabilized laterite. Maximum Dry Density (MDD), Optimum Moisture Content (OMC), California Bearing Ratio (CBR) and Unconfined Compressive Strength (UCS) of the laterite were determined to ascertain its suitability as a construction material. Laterite samples were stabilized with 1M and 2M PA at 5, 10 and 15%, respectively, by weight of dry soil. Some PA stabilized laterite were further mixed with an alkaline activator. All the stabilized laterites were moist cured for up to 14 days. The results show that the laterite was unsuitable as a road construction material in its natural state. The CBR of PA stabilized laterite improved with about 25%, while that with alkaline activation showed more improvement of up to 145%. The UCS of PA stabilized soil and that with alkaline activation increased with about 250% improvement. In conclusion, alkaline activation of phosphoric acid stabilized laterite soil for road construction has a great promise. PubDate: 2022-12-20 DOI: 10.9744/ced.24.2.115-124 Issue No:Vol. 24, No. 2 (2022)
Authors:Dario Rosidi Pages: 125 - 132 Abstract: This paper presents an alternative construction method of a highway along coastal area underlain by thick normally consolidated very soft organic clay. Due to its remote location, mitigations to strengthen the soft clay are deemed too costly and/or require significant time to mobilize. Without mitigations, the presence of this very soft clay necessitates the roadway embankment to be constructed in phases to allow partial consolidation of clayey soils to take place before additional embankment fill can be placed. At each construction phase, the additional fill thickness and staging time are determined, and the corresponding degrees of consolidation and incremental strength gains are calculated at discrete grid points within the soft organic clay. The stability of the partially built embankment is then evaluated, and the fill thickness and staging time are adjusted to meet the stability safety requirements. The settlement due to fill placement can be estimated at each construction phase and included as an overbuilt to the next fill placement thickness. Impacts of soil horizontal and vertical movements due to filling to pile foundations are also be discussed. PubDate: 2022-12-20 DOI: 10.9744/ced.24.2.125-132 Issue No:Vol. 24, No. 2 (2022)
Authors:Dr. Gogot Setyo Budi, Levin Tanaya First page: 109 Abstract: This paper presents the response of velocity wave of two part of concrete spun piles that connected together by welding. The stress wave velocity was recorded using Pile Integrity Test (PIT). Two specimen of spun piles used in the experiment. The first sample was prepared visually no gap between the two end-plates of both parts of pile, while the second specimen was prepared by inserting 5mm thick steel plate into the splice to create a gap in its connection. The results show that a spike of reflecting stress wave velocity still develops at the splice with and without gap of spun piles regardless the steel endplates was welded in full circle. The splice that was prepared visually without gap still exhibits gap, which changes the impedance of the specimen. The relatively high spikes of reflecting waves at pile toe are noticed for both specimen with and without gaps that welded in full circle. It shows that the full welded splice able to transfer stress wave velocity. A good quality of welded splice can be indicated by the reflecting wave at the pile toe, regardless the reflecting wave development at the splice PubDate: 2022-10-03 DOI: 10.9744/ced.24.2.109-114 Issue No:Vol. 24, No. 1 (2022)
Authors:Albert Eddy Husin Abstract: The increase in energy consumption in the operation of the building construction industry globally has increased by a percentage of 35%, so that this increase can lead to an increase in carbon emissions which was originally at a percentage of 28% to 38%. The concepts of Green Retrofitting, Dynamic Systems and Value Engineering can be researched based on the influence on improving the cost performance of Green Retrofitting in high-rise (existing) office buildings and connected with the Structural Equation Modelling-Partial Least Square (SEM-PLS) analysis model. PLS-SEM is very appropriate to be used in research aimed at developing theories. The results of this study show that in the application of the Green Retrofitting concept in high-rise office buildings using Dynamic Systems and Value Engineering has a significant effect on improving the cost performance of Green Retrofitting and get the most influential factors are Top Management Support, Energy Efficiency, Water Efficiency, Indoor Air Quality, Retrofitting Planning, Retrofitting Initial Costs, Bill Of Quantity, Dynamic System Model Generation, Alternative Material Selection, and Material Cost Reduction Issue No:Vol. 24, No. 2
Authors:Albert Eddy Husin Abstract: Weather trade and worldwide warming or environmental damage and degradation have led to diverse herbal failures, social disasters and critical economic screw ups. Global warming has increasingly more affected not handiest our daily lives however additionally our enterprise activities. The application of the new green area concept is a consequence of the increase in the cost of green areas incurred by stakeholders so that residential areas become environmentally friendly, the concept of new green areas, Value Engineering, Life Cycle Cost Analysis are the main factors that influence the improvement of cost performance of implementing the concept new green areas in residential areas in Indonesia, using structural equation model- partial least square (SEM-PLS) analysis. This research has an update related to the concept of applying new green areas to residential areas in Indonesia. The results of this study acquired "10 factors that affect the cost performance of new green areas in residential areas", namely Project Management, Infrastructure and Facilities Burdens, Infrastructure and Facilities Service Functions, Microclimate and Ecosystem Preservation, Environmentally Friendly Materials, Development, Cost Breakdown Structure, LCC Analysis, Evaluation, Value Engineering. Issue No:Vol. 24, No. 2
Authors:Yusuf Haroki, Ali Awaludin, Henricus Priyosulistyo, Angga Fajar Setiawan, Iman Satyarno Abstract: This study aims to compare the seismic performance of simply support hollow slab on pile group (SHSPG) structures designed as “critical” and “essential” viaducts with shear panel damper (SPD) devices. There are three numerical models to be compared, such as SHSPG-A, SHSPG-B, and SHSPG-C. SHSPG-A is designed as a “critical” viaduct, while SHSPG-B and SHSPG-C are designed as an “essential” viaduct. Eight SPDs are applied to SHSPG-C in each direction to upgrade its seismic performance. Numerical models consider the prestress effect of the spun pile. Nonlinear time history (NLTH) analyses are executed using seven pairs of recorded ground motions that are scaled and adjusted to the seismic characteristics of Yogyakarta. As the result, the performance level of SHSPG-A is much better than SHSPG-B. However, the SPDs application can keep SHSPG-C’s performance at the same level as SHSPG-A with a contribution of 34.28%-53.03% in dissipating energy. Issue No:Vol. 24, No. 2
Authors:I Made Kariyana, I Gusti Made Sudika, Tri Hayatining Pamungkas, I Made Pasek Mahardika Abstract: The number of traffic accidents on Jl Denpasar – Gilimanuk, Tabanan Regency, has increased from year to year until now. The factors of traffic accidents that can affect the type of victims of traffic accidents cannot be defined quantitatively, so it is necessary to research the aspects of traffic accidents using the Multinomial Logit method. The results of the analysis of the chances of minor injuries to fatal injuries are = e(4.312-2.048*Location_1-1.641*Vhcl_0-1.557*Vhcl_1). Suppose an accident occurs on a section of the road. In that case,the risk of minor injuries is 1.29 victims fatal injuries, if the accident involves a heavy vehicle, the risk of minor injuries is 1.94 victims dying and if the result of the suspect's vehicle is a light vehicle, the risk of occurrence of the victim is 0.79 victims fatal injuries. The chances o serious injury to fatal injuries are = e(0.497-0.095*Location_1-2.888*Vhcl_0-1.098*Vhcl_1). If the accident involves a heavy vehicle, the risk of victims is 0.56 with victims fatal injuries. Involving light vehicles, the risk of serious injury is 3.34 victims fatal injuries. Issue No:Vol. 24, No. 2
Authors:I Kadek Adit Putra Igmas Abstract: Competition in the construction industry requires consulting companies as building construction design planners to make efficiency and savings related to construction costs. One of the efforts in saving is applying Value Engineering (VE), which is a method of saving by changing the design of specific jobs with designs that are cheaper but still maintain function, quality, and performance. The purpose of this research is to choose an alternative material that is effective and efficient on architectural work using the Value Engineering (VE) method. The selection on architectural work design due to its highest cost in budget plan. The methods that used in this research, first, to select alternative architectural work items used Pareto diagram analysis. Second, Value Engineering analysis implemented function analysis, advantage and disadvantage analysis. Finally, the determination stage used the Analytical Hierarchy Process method (AHP). The results showed that wall, floor, and wall ceramic works is the highest cost. The total cost of that works is IDR 17,976,070,225 that equal to 56.65% from total cost all of the works. In detail, there are four works items derived from wall, floor, and wall ceramic works: light brick wall work, ceramic floor work, plaster work, and bathroom wall ceramic work, that have highest costs. The function analyses resulted the work with cost / worth > 1 are light brick wall work, floor ceramic work, and bathroom wall ceramic work. Based on the function analysis and advantages and disadvantages analysis, the AHP was conducted. It was found that the cost savings are 0%, 45.2%, and 73.3% on light brick wall work, ceramic floor work, and wall ceramic work, respectively. The light brick wall work were 0% saving because the chosen alternative same as the initial design. In the ceramic floor work, the savings were IDR. 1,411,162,686 due to the lower cost of selected alternative which is used vynil flooring. On the work of bathroom wall ceramics were calculated savings of IDR 808.000,212 by selecting expose wall as a chosen alternative. Issue No:Vol. 24, No. 2
Authors:Benny Tua Siahaan Abstract: Corona Virus Disease 2019 (Covid19) is an infectious disease caused by the SARS-CoV-2 virus. Covid19 which entered Indonesia on March 3, 2020, had an impact on the transportation sector, especially sea transportation in Indonesia. Sea transportation contracted by 17.48% due to the implementation of travel restrictions and cancellation of ship trips during the COVID-19 pandemic. During the COVID-19 pandemic, the number of passengers at the Kupang Tenau port decreased in July and December by 54.66% and 53.84%, respectively. This study aims to determine the performance of sea transportation services and recommendations for improvement during the adaptation period of new habits using the IPA (Importance Performance Analysis) and QFD (Quality Function Deployment) analysis methods. The research variables were taken from the policy rules issued regarding health protocols to prevent the transmission of COVID19. Several variables are categorized as "low priority" namely limiting seating capacity, keeping distance facilities, spraying disinfectants, isolation rooms, limiting entry queues, and closing bulkheads. Then improvements were made to deal with problems during the Covid19 pandemic, namely imposing seat restrictions (18,005), providing bulkheads (17,440), completing warning signs (16,772), tightening supervision (15,574), entering passengers according to capacity (15,135), spraying disinfectants in the terminal area (14,989), Providing isolation rooms (14,870), Sanctions for passengers (12,392). From the results of the study, it is hoped that during the new adaptation habit, services in the sea transportation sector can return to normal. Issue No:Vol. 24, No. 2
Authors:Aulia Dewi Fatikasari Abstract: Noise is one of the parameters that is often investigated by traffic engineering experts because noise causes negative effects in the form of noise pollution which if left unchecked will affect the eardrums of road users. Noise is often also associated with the amount of traffic volume, so that roads that have a high volume of traffic every day will have noise pollution that can disturb motorists. In this study, we want to find out what is the most dominant factor from the type of vehicle that passes on the Road that significantly affects the amount of noise pollution that exists. The method used to measure these factors is linear regression, non-linear regression and multiple regression calculated from the trend analysis on the scatter diagram. The quantity used as a determinant is the correlation value from the regression calculations for each type of vehicle that passes on the road. The results obtained from this study are that noise on Jalan Raya Dharmawangsa is influenced by the type of motorcycle (MC), light vehicle (LV), and heavy vehicle (HV) with the formula for noise value dB = 0.0051MC - 0.0049LV + 0.012 HV + 67.469. Based on the algorithm model of the relationship between traffic volume of each type of vehicle and noise, motorcycles are the type of vehicle that has the most effect on noise because it has the highest R2 value compared to other vehicles. Issue No:Vol. 24, No. 2
Authors:Said, Euis Kania Kurniawati, Nia Kartika Abstract: One of the problems of high-performance concrete is its high autogenous shrinkage value. This is because of the use of a low water-cement ratio. Autogenous shrinkage is shrinkage in concrete caused by reduced water content because of cement consumption in the hydration process. This study used saturated ALWA as internal curing material to mitigate autogenous shrinkage. ALWA has characteristics such as a coarse aggregate of crushed stone but has a low mass and high adsorption properties, so it allows the material to store water reserves to be used during the hydration process of concrete. This study used an experimental method on autogenous shrinkage specimens measuring 100x50x50 mm with an observation time of 28 days. The results of this study indicate that the addition of saturated ALWA to high-performance concrete effectively reduces autogenous shrinkage as the concrete ages. However, in the first 24 hours, saturated ALWA as an internal curing material has not shown maximum performance because the concrete has not yet reached the final setting condition, where the amount of water mixed in both types of concrete is still almost the same condition. Issue No:Vol. 24, No. 2
Authors:Ismatud Dianah Amir Abstract: Road accidents are an unavoidable problem, especially accidents caused by Over-dimension and Overloading trucks. This study involved environmental factors, driver factors, vehicle factors, and road factors which had previously been analyzed using the multinomial logistic regression method with questionnaire data of 194 respondents and resulted in 6 indicators including road surface conditions, traffic flow volume, accident history, vehicle load, vehicle dimension, and speed limit signs. The purpose of this study was to find out relationship between latent variables using the Structural Equation Modeling Partial Least Square (SEM PLS) method to obtain a model of the factors causing Over-dimension and Overloading truck accidents. The model results obtained indicate that weather conditions, road surface conditions, lighting condition, certified training, driver's physical condition, vehicle type, vehicle dimension, vehicle load, road geometry, accident location, traffic facilities, as well as vehicle dimension, and speed limit signs were the variables that had the greatest influence. Issue No:Vol. 24, No. 2
Authors:Michael Moreno, Tomy Andrea Gunawan, Handoko Sugiharto Abstract: Self Compacting Concrete (SCC) is rising in favor since it only needs a small amount of workers during its casting process. Knowing the fact that coconut waste in Indonesia reaches 2.811.954 tons in 2020, the effects of coconut fibers and their treatments are researched within the fraction of 0%, 0,5%, and 1% fibers against cement volume in each concrete sample. 2 different treatments, boiling and mixing with silica fume, are given to the coconut fibers. This research is done to study Coconut Fiber Reinforced Self Compacting Concrete (CFRSCC) properties suitability as SCC. Compressive strength and split tensile of CFRSCC are tested within 7, 14 and 28 days. Results show that filling ability, flowability, and passing ability of CFRSCCs are reduced, but some still qualify as SCC. Compressive and split tensile strength of some CFRSCCs also increases, with 0,5% volume fraction of fibers mixed with silica fume as the optimal strength increase. Issue No:Vol. 24, No. 2
Authors:Desri Marfenita Hale Kore, Muhammad Zainul Arifin, Fauzul Rizal Sutikno Abstract: Traffic accidents can occur due to many factors. Human error is a major factor in traffic accidents that is often ignored. This study aims to determine the effect of the characteristics and personality of a car driver on the chance of having an accident. The result of multinomial logistic regression model of once accident probability: P=-4.786–0.081X1+19.503X31–1.459X6.51–1.086X6.52, and the model of more than once accident probability: P=-4.950–0.113X1+20.992X31+3.247X5.11–3.291X5.21–1.559X5.22–2.203X6.52+0.633X7.4. Age, elementary education level, car engine and brake inspection, attitude to run red lights, smoking habits and neuroticism personality type have a significant influence on the chance of an accident either once or more than once. From this result, it can be concluded that there is a need for prevention to minimize accident rates such as early introduction to traffic safety, the importance of vehicle inspection, good and correct driving attitudes and psychological tests for personality. Issue No:Vol. 24, No. 2
Authors:marzela tricilia Abstract: Green construction buildings or environmentally friendly buildings are building concepts with a planning process that prioritizes natural resources as much as possible, by utilizing waste that previously could damage nature, used to be useful as building materials, so that materials previously used can damage nature and the environment because the exploitation of aggregates can be reduced. Base A aggregate test results of 0%, the resulting CBR value is 96.38%. Mixing with 10% resulted in a CBR value of 98.38%. as many as 20% produced a CBR value of 96.38%, and 30% produced a CBR value of 87.71%. Testing of rubber seed coat waste as a mixture of fine aggregates on base A can be used. However, it is worth noting the composition to be used for base A. Mixing aggregates with rubber seed waste as much as 10% and 20% can be used for base A because the CBR value is greater than 90%. Issue No:Vol. 24, No. 2
Authors:Luthfi Luthfi, Ayomi Dita Rarasati Abstract: The provision of public housing by the government has not been able to meet the housing needs, particularly affordable housing for low-income communnity/citizen. Collaboration between the government and private sector is needed in the form of public private partnership to increase the feasibility of public housing projects, especially in the investment/financial context. This study aims to evaluate investment feasibility of the public housing project that planned through the PPP scheme based on a case study in Bandung City of Indonesia. An engineering economy method was used in this study to calculate capital budgeting and the life cycle cost including the revenue based on the data, standards/regulations, and interview from the government and other institution related to public housing. Public housing project planning through the PPP scheme was developed for the provision of public apartments (35%) and commercial apartments/facilities (65%) that utilize government-owned land by rental. The Project can generate investment valuation with the Internal Rate of Return (IRR) of 13.18%, Net Present Value (NPV) of IDR 610,063,962, Payback Period for 7.45 years, and Debt-Service Coverage Ratio (DSCR) of 1.14. In general, the investment of public housing project through PPP scheme is feasible based on various indicators, but still requires development to improve investment attractiveness for the private sector. Issue No:Vol. 24, No. 2
Authors:Andrean Rahady Juanizar, Suripin, Ignatius Sriyana, Suprapto Abstract: Seepage condition must be monitored regularly in embankment dams due to its vulnerability in seepage failure. Evaluation process can be done by interpreting the monitored data of seepage instrumentation installed on the dam. This study aims to evaluate the seepage condition in the Sindang Heula Dam, located in Serang Regency, Banten Province. Piezometer and v-notch data are interpreted. In general, the seepage monitoring instrumentation at the Sindang Heula Dam is functioning well. Evaluation of seepage is done using seepage acceptance criteria and seepage index (QI) values. The results showed seepage discharge are ranging from 1.28-2.05 l/min/m, greater values than the requirement of 0.28 l/min/m, therefore it did not meet the acceptance criteria. Meanwhile, the value of seepage index (QI) was in the range of 0.1-1 (no QI>1), concluded that there was no excessive seepage occurred. Issue No:Vol. 24, No. 2
Authors:Nicholas Hartono, Teuku Faisal Fathani Abstract: Spatial analysis is performed to delineate the liquefaction susceptibility zones at Yogyakarta International Airport. The low to medium cohesionless soil consistency is predominantly observed on site. A shallow groundwater level and low fines content have also enlarged the likelihood of earthquake-induced liquefaction. Simplified method is adopted in this work to indicate Factor of Safety (FoS) towards liquefaction whereas Liquefaction Severity Index (LSI) is executed to measure the severity of liquefaction and presume its manifestation. Inverse Distance Weighted (IDW) interpolation in QGIS is chosen to produce a comprehensible map with 50 m × 50 m in size rasters. The analysis results show more than 90% of YIA area is prone to undergo liquefaction at various depths. Moreover, based on LSI analysis it concludes that the YIA area is categorized as a very low to moderate severity status where the southeast and west side of YIA be the most governing areas. Issue No:Vol. 24, No. 2
Authors:HUSSEIN MOHAMMED Abstract: The availability of a wide variety of mass transit services is a major element of developing a sustainable transport system. The transportation system in the Obafemi Awolowo University and Obafemi Awolowo University Teaching Hospital Complex link road is a source of concern to users especially public transport commuters, as a result of the restrictions placed on public transport operators on the route. The transportation system of this route fails to meet up to the standard of an efficient transit system, thus, it is imperative that it is made more efficient. Maps of the study route were procured and land use activities and transport facilities were obtained. Questionnaires were administered to both operators and commuters of the route under study. Information on diversity of vehicle/owners, transport costs and transport service performance characteristics were elicited from operators’ survey, while socio-economic characteristics, occupational related journeys/travel, origin and destination and impact of transport infrastructure from commuters. Data obtained were analyzed and subjected to regression analysis using SPSS 20.0 and a trip generation model was developed. The land use activities along the route include hospitals, schools, academic and residential buildings. Transport facilities included two bus terminals and one car park. Eight shuttle cars transited the route at the time of study conveying a total of four thousand nine hundred and thirty (4930) commuters weekly. The trip generation model developed is T = 4.220 + 0.005 + 0.148 + 0.0892 , where, T = number of trips, = income, =household size and = number of vehicles. A trip generation model has been developed and could be used to forecast future trip making, and the provision of mass transit vehicles for the route. Issue No:Vol. 24, No. 2
Authors:Agata Iwan Candra, Evita Fitrianis Hidiyati , Rizky Bagus Setiyawan, Endah Nungki Pratiwi, Muhammad Aditama Nugraha, Sandufan Kusuma Mahendra, Prasetyo Agung Laksana, Mohammad Rofiq Abstract: Lumajang Sand is a fine natural aggregate often used in East Java. Lumajang sand has sand characteristics with a significant iron concentration and sand consisting of magnetite, Fe3O4, and little titanium, silica, manganese, calcium, and vanadium. The specification of fine aggregates for asphalt pavement is the weight of the type and aggregate water absorption. Several studies on the type weight and absorption of water show that the shape, size, and gradation of aggregate particles affect the performance of asphalt mixtures. However, there have been no studies using fine aggregates from Lumajang Sand. The study aimed to determine whether the fine aggregates used for asphalt pavement mixtures met specifications according to SNI standard 03-6819-2003. The results obtained are calculated to calculate pseudo-type weight, surface dry type weight, bulk type weight, and aggregate water absorption. The study results obtained an average value of fine aggregate type weight of 2.73 and water absorption by 2%. The aggregate tested had met the required specifications with a type weight ranging from 2.5 - 2.8 grams and a maximum absorption value of 3%. Issue No:Vol. 24, No. 2
Authors:Agata Iwan Candra, Evita Fitrianis Hidiyati, Rizky Bagus Setiyawan, Endah Nungki Pratiwi, Muhammad Aditama Nugraha, Sandufan Kusuma Mahendra, Prasetyo Agung Laksana, Mohamad Rofiq Abstract: Lumajang Sand is a fine natural aggregate often used in East Java. Lumajang sand has sand characteristics with a significant iron concentration and sand consisting of magnetite, Fe3O4, and little titanium, silica, manganese, calcium, and vanadium. The specification of fine aggregates for asphalt pavement is the weight of the type and aggregate water absorption. Several studies on the type weight and absorption of water show that the shape, size, and gradation of aggregate particles affect the performance of asphalt mixtures. However, there have been no studies using fine aggregates from Lumajang Sand. The study aimed to determine whether the fine aggregates used for asphalt pavement mixtures met specifications according to SNI standard 03-6819-2003. The results obtained are calculated to calculate pseudo-type weight, surface dry type weight, bulk type weight, and aggregate water absorption. The study results obtained an average value of fine aggregate type weight of 2.73 and water absorption by 2%. The aggregate tested had met the required specifications with a type weight ranging from 2.5 - 2.8 grams and a maximum absorption value of 3%. Issue No:Vol. 24, No. 2
Authors:I Kadek Adit Putra Igmas, Yatnanta Padma Devia, Kartika Puspa Negara Abstract: Competition in the construction industry requires consulting companies as building construction design planners to make efficiency and savings related to construction costs. One of the efforts in saving is by applying Value Engineering (VE), which is a method of saving by changing the design of specific jobs with designs that are cheaper but still maintain function, quality, and performance. This study analyzes the savings when VE is applied in the early stages of door and window work design. This research combines qualitative and quantitative research with a case study of the X Hotel Development Project. The research method in selecting alternative door and window work items uses Pareto diagram analysis and in Value Engineering analysis using function analysis, advantage and disadvantage analysis and at the determination stage using the Analytical Hierarchy Process method. (AHP). The results showed that the application of VE on wall work resulted in savings of ±50% of the total cost of door and window framework from IDR. 562.800.000 to IDR. 230.820.896 with a cost savings of IDR. 331.979.104. The chosen alternative is meranti wood with the initial design, namely teak wood. Issue No:Vol. 24, No. 2
Authors:Roland Gasenda Suryaningrat, Yatnanta Padma Devia , Indradi Wijatmiko Abstract: The construction industry is an industry with a high incidence of accidents caused by complexity and fluctuating work, so Occupational Health and Safety is a significant concern at this time. This study will apply a lean approach to minimize the risk of accidents in precast factories. Accidents obtained through questionnaires and interviews will be processed using the Hazard Identification, Risk Analysis, and Risk Control (HIRARC) method. After an unacceptable accident is found, repairs will be made to eliminate the accident with the concept of Seiri, Seiton, Seiso, Seiketsu, Shitsuke (5S). From the results of this study, it was found that there were six accidents with the highest level of risk, namely workers being hit by material, workers injured by cutting tools, workers experiencing overwork, workers lacking focus, being hit by heavy operating equipment, and workers being caught in moulding. Recommendations for improvement to overcome these accidents are by making area training, increasing work operating standards, moving the batching plant, adding additional transportation, making posters and providing rewards and punishments which will later be able to minimize the occurrence of accidents. Besides that, it also can avoid accident costs about IDR. 331,700,000.00. Issue No:Vol. 24, No. 2
Authors:Muhammad Mahesa Ramadhan Ramadhan, Yatnanta Padma Devia, Indradi Wijatmiko Abstract: Kebutuhan hunian bagi masyarakat masih tinggi, namun dengan keterbatasan lahan, saat ini perumahan lebih banyak dibangun secara vertikal. Alhasil, pembiayaan awal untuk bangunan hunian vertikal tentu lebih mahal. Tidak hanya faktor biaya saja yang diperhitungkan, namun kualitas dan waktu juga perlu diperhatikan. Objek penelitian ini adalah pembangunan Apartemen X 30 Lantai di Tangerang Selatan – Indonesia, dengan nilai proyek sebesar Rp. 203.204.569.971. Dengan adanya nilai proyek, penelitian ini bertujuan untuk menghitung penghematan atau efisiensi biaya dengan menggunakan metode value engineering khususnya pada pekerjaan arsitektur proyek pembangunan Apartemen X Tangerang Selatan – Indonesia. Metode penelitian menggunakan 4 (empat) tahap, yaitu tahap informasi, tahap spekulasi, tahap analisis, dan tahap presentasi. Metode Technique For Order Preference by Similarity to Ideal Solution (TOPSIS) digunakan untuk sistem pengambilan keputusan alternatif. Hasil penelitian ini menunjukkan penerapan value engineering pada Proyek Pembangunan Apartemen X dengan rencana awal sebesar Rp. 203.204.569.971 turun menjadi Rp. 201.685.400.449 atau 0,75% pada pekerjaan jendela (J1), pekerjaan pintu kaca (PL1), pekerjaan pintu (PD1), pekerjaan dinding, dan pekerjaan lantai keramik HT tipe KR2B. Issue No:Vol. 24, No. 2
Authors:Alfetra Henoch Tandita, Yuskar Lase, Mulia Orientilize, Widjojo Adi Prakoso Abstract: Numerical study was conducted by ABAQUS software to investigate two issues on spun pile connections. The issues are usage of non-shrinkage concrete infill cast inside hollow of pile and ductility. An experimental test was carried out to investigate the effect of two different concrete infill types which were common concrete fc’ 35 MPa and non-shrinkage concrete fc’ 54 MPa. A finite element model was validated against experimental test. The results were compared in terms of hysteresis curve, ductility, and performance level. Ductility is one of the important parameters to describe performance of spun pile connections under seismic load. There are different approaches to calculate ductility and this leads to four different ductility values. Hence, ductility of spun pile with concrete infill is in the range of 3.2 to 4.8. In addition, behaviour of spun pile with non-shrinkage concrete infill is slightly improved although the results were almost similar. Issue No:Vol. 24, No. 2
Authors:Nouhaila Benachir, Farida Bendriaa, Taoufiq Mohib Abstract: The article presents the design approach of a house using the simulation software of the thermal behavior in dynamic regime TRNSYS, this project aims at the design of a single-family house whose energy balance over one year of operation. In this first phase of the project the main focus was on the design of the envelope with MCP type 204 systems and mechanic solar ventilation (MSV) are integrated in the overall model. The energy consumption related to the specific uses of electricity is taken into account in the annual energy balance. The whole project is modeled under TRNSYS V16 for the climate of CASABLANCA NOUASSEUR . The results show that the mechanic solar ventilation (PCM+MSV) reduces the operating temperature of the house significantly. Indeed, the mechanic solar ventilation has decreased its average operating temperature by about 2.6°C-3.88°C. It is concluded that ventilation (PCM+MSV) is an interesting passive technique to improve comfort and decrease energy consumption. Issue No:Vol. 24, No. 2
Authors:Nouhaila Benachir, Adekunle ADEPOJU. Abstract: The extensive use of burning fossil fuels raises the level of carbon dioxide in the atmosphere thus resulting in serious greenhouse effects. The greenhouse gases gradually increase the temperature of the Earth’s surface and therefore bring us a warmer atmosphere and collapsing global environment. There is no doubt that climate change is upon us, therefore the next appropriate action is to minimize those long-term effects. Increasing the use of renewable energy has been encouraged by government in many countries ,because this technology provides an excellent opportunity for the mitigation of greenhouse gas emission and reducing global warming through substituting conventional energy sourcesAdvancement of technology in the 21st century has created a series of low power consumption and smaller size consumer electronics. This phenomenon had opened up the opportunity for the development of energy harvesting technique from low power energy sources such as from the vibration via piezoelectric materials, bioenergy from organic compounds via microbial fuel cell, radio frequency (RF) signal via RF power harvester, thermal energy via thermo-electric generator (TEG) and light energy via solar photovoltaic cell. These technologies had been well known and used to harvest micro-energy.Hence, apart from these existing technologies, this research would like to introduce the usage of living plants as another new renewable energy source to harvest micro-energy. Certain plants can produce a continuous small amount of electrical power at both day and night, unlike solar power, which is only functional in the presence of light. This new source of energy from plants is renewable, pollution free and sustainable as long as the plant is alive. Plants are sensitive to light due to its photoreceptors, which can be categorized as phytochromes, Living-plants have been proven to have a potential for renewable energy source by embedding pairs of electrodes into it to allow flow of ions and hence generate electricity. Multiple tests using different type of electrodes and plants suggested that voltages are produced to greater or lesser extents where combination of copper (Cu)-zinc (Zn) and Aloe Vera produces the highest voltage output. To optimize the power output from the plant, a comprehensive knowledge regarding the mechanisms of energy generation is necessary. Initial hypothesis inferred this from electrochemistry process. Therefore, the presence of trace metals from the electrodes using Flame Atomic Absorption Spectroscopy (FAAS) was investigated in the plant to gain insight into the origin of the energy production. To further justify the stated hypothesis, comparison of trace metals concentration in electrodes immersed Aloe Vera between opened and closed circuit is also investigated. The obtained result confirmed that the electrochemistry process is responsible for the mechanism of the energy production from living plant. Issue No:Vol. 24, No. 2
Authors:soewignjo agus nugroho, Lambertus Hendrik Tutanion, Gunawan Wibisono, Andarsin Ongko Abstract: The reuse recycling materials or industrial waste materials with aims to reduce pollution and environmental pollution, strongly supports concept of green building. Fly Ash is result of combustion pulverized system coal at the PLTU Tenayan, is no longer included in the B3 waste category. The usage of Fly Ash usage as building material, mine restoration, roads in this decade, is to replace cement or lime. The fly ash composition is mixed with lime for sub-base, will applied on high plasticity soils. A fix-mixture of soil and lime 5%, mixed with fly ash up to 30% of the mixture. The samples test was made at Optimum Moisture Content, with density values around Maximum Dry Density i.e. under compacted (under MDD) and over compacted (above MDD). Consolidated testing was performed with and without curing. Changes of load are represented by load increment ratio (LIR). The selected LIR value is 1.0; 1,5; and 2.0. The results showed that the higher of density, the volume of void is lower. The soil compression index value is the same for all density values, if the soil structure has not destroyed. or fatigue yet. In samples with crushed/broken soil structures, the value of the compressibility index decreased sharply. Curing successfully decreased the void ratio and compressibility of the soil. The strength of fly ash will decrease when reacting with water, so if soil burdened, the void ratio decreases drastically. The formation of strong molecular bonds between Fly ash and lime takes time. So, the compressibility value of the sample by curing 28 days is better than without curing. The composition levels between fly ash and lime also affects the compressibility index of the mixture. The optimum combination occurs in samples with a fly ash content of 25%. Issue No:Vol. 24, No. 2
Authors:kamaluddin lubis Abstract: Natural latex is the output by rubber plants. The rubber plants are one of output plantation sector that we could found in Indonesia expecially North Sumatera Province. A rubber is superior commoodity for human needs which is used for the ingredients of asphalt mixture substitution. Latex is a colloidal solution consisting of various substances, natural latex could improved the quality of the asphalt mixture. We could found the rubbers in the market so much but its extremely cheap. Renewable innovation is needed to utilised rubber resources by using it as an asphalt substitute material. The method used in testing the 2018 Bina Marga and ASSTHO methods. The use of natural latex as a substitute is pure latex, first testing for the manufacture of KAO values (optimum Asphalt content) by making test specimens mixed with asphalt content ranging from 3% and 6%. The optimum asphalt content was obtained and then tested by mixing latex with variations in the composition of the mixture starting at 0%, 3%, and 6%. The collision was carried out with a standard proctor with a collision of 2 x 75 until the test object was declared solid and then tested with a Marshall tool. The test results from determining the optimum asphalt content of 4% there are results of 845 kg, 5% asphalt content of 1015 kg, 6%, and 7%, and the stability values obtained are 1015kg and 850 kg respectively. this value still meets the specified standard while the ductility test value obtained >1000 mm also still meets. Meanwhile, at levels of 3% and 6%, the stability value was reduced and did not meet the standard. The results showed the addition of latex substitution with high latex content has qualify of ductility although the value of stbility decreases Issue No:Vol. 24, No. 2
Authors:Jimmy Chandra Abstract: 3D Concrete Printing (3DCP) provides many advantages for construction industry especially on productivity, waste, labor, and environment. Many research has been conducted on the material development for 3DPC. However, there are not many research which study the structural behavior of 3DPC. This experimental research aims to analyze flexural and shear behavior of 3D printed concrete beams. Five longitudinal reinforcement ratios were used to analyze its crack patterns, failure mode, ductility, and capacity. The experimental results were then compared with analytical results by using ACI design code. The results show that higher longitudinal reinforcement ratio will yield higher capacity of 3DCP beams. Because of layer by layer printing process, 3DCP beams are prone to local failure of filaments and macroscopic voids caused by placement of steel as longitudinal reinforcement causing sudden drop on its capacity and ductility. ACI code underestimates the capacity of 3DCP beams failing in flexure and shear mode. Issue No:Vol. 24, No. 2
Authors:Fat-Hanna Marami SA Abstract: Abstract: Knowledge is an asset for the company. If the knowledge and experience of construction employees are properly documented and disseminated, this knowledge will be preserved, so this is the importance of implementing knowledge capture. There are still few studies that discuss the implementation of knowledge capture in construction companies in Indonesia, especially in the city of Surabaya. The purpose of this study was to find out how the implementation of knowledge capture in the construction company qualification B in the city of Surabaya. The method is carried out by interviews and qualitative analysis with the help of NVIVO 12. The results show that there are still qualification B construction companies in Surabaya that have not succeeded in implementing knowledge capture in their companies. They still do not have a structured and formal system, so the application of knowledge capture is not running optimally. Keywords: Knowledge Capture, Implementation, Qualitative Analysis, NVIVO 12. Issue No:Vol. 24, No. 2
Authors:David Idiata Abstract: Dynamic Modulus of material characteristics is employed to describe any kind of material modulus which can be ascertained under dynamic load situations. It is often the measure of the stiffness of the material. Like every other civil engineering structure the performance of the road infrastructure is a description of the ability of the structure to satisfactorily perform the task it was designed. Looking at it from the perspective that the environment to a large extent is vital to the above hence this study to predict the effect of dynamic modulus on asphalt concrete using UKCP09 climate projection tool. The summer month average temperature of 2015 was used and it is observed that the temperature increases from 2020s gradually to 2080s and so did the dynamic modulus reduce from 2020s to 2080s. The study also shows that the while the temperature is observed to increase from south to the north of England the dynamic modulus was seen to decrease from north to south. Issue No:Vol. 24, No. 2
Authors:David Idiata Abstract: Soil is a widely distributed naturally occurring natural material derived primarily from rocks and rocky minerals. Because soil is a natural product, it has a changeable and complicated character by definition. When it comes to foundation design, the most important soil feature to consider when choosing a soil type is bearing pressure. The bearing capacity is one of the key elements required to design foundations in soils. How well a structure's foundation performs will depend on the nature and property(ies) of the soil beneath it in relation to its capacity to withstand pressure. However, it is important to note that the bearing pressure of soils is affected by contaminants or pollutants in the geo-environment which produces a negative effect on the soil engineering characteristics. Issue No:Vol. 24, No. 2
Authors:Alfinna Mahya Ummati, Michael, I Putu Ellsa Sarassantika, Gibral Tariq Fanna, Syahidus Syuhada, Bayzoni, Ade Prayoga Nasution Abstract: Experimental test performed in order to identify the effect of the pivot hooks presence which added to the flexural reinforcement which made by bamboo materials to avoid the bond slip failure that mostly occur in the bamboo reinforced concrete beams. The experimental test which verified by the numerical analysis by FEA NX commercial software proof that the pivot hooks are able to increase the loading capacity of a concrete beam 33% - 40% higher than the bamboo reinforcement without the pivot hooks. Architectural façade and budget efficiency caused the bamboo become unavoidable material in construction, by adding the structure modification such as the pivot hooks for the bamboo reinforcement, the failure can be reduced, then the entanglement of bamboo in construction become more functional. Issue No:Vol. 24, No. 2
Authors:Andhika Agraprana, Kartika Puspa Negara, Yatnanta Padma Devia Abstract: A company's competitive advantage is directly correlated with knowledge-sharing (KS). Therefore, this study examined: (1) the relationships among top management commitment, knowledge sharing, and company performance, (2) the relationship between top management commitment and company performance with the KS process as a mediating variable. The structural equation modeling partial least squares (SEM-PLS) was used in this research. The result shows that top management commitment positively affects KS process in the construction company, and KS process positively affects the construction company performance. This study also found that top management commitment positively and significantly affects the construction company performance, with KS process as the mediating variable. Therefore, it can be argued that top management commitment plays an important role in improving KS process in the company, so the company performance also increases. This study contributes to understanding the important role of top management commitment in implementing knowledge sharing to improve company performance. Issue No:Vol. 24, No. 2
Authors:I Nyoman Yudha Astana Abstract: The ability of the team to create and reach consensus on important goals, objectives, and project plans, while employing the proper tools, techniques, and processes to carry out the team's work plan, is the key to a high-performance team. The drive of each member of the team to put in long hours and be highly productive to attain efficiency is one of the elements that influence team performance. This study's goal is to examine the connection between team performance and motivation in building projects using a small-scale project in Denpasar City. Partial Least Squares using SmartPLS 3.0 were used to conduct the analysis utilizing quantitative descriptive statistics. The analysis reveals that extrinsic motivation has a greater impact on boosting the motivation of the project team's workforce than self-actualization, communication, and other factors. When managing projects for small-scale contractors, issues relating to the need for wages and fair compensation are more crucial. to boost team performance while boosting employee motivation. Issue No:Vol. 24, No. 2
Authors:Jojok Widodo Soetjipto, Faizatus Sholikhah, Entin Hidayah Abstract: Disaster is a threat to human life, namely loss of life, injured people, loss of homes, loss of infrastructure, and others. In addition, disasters' frequency and intensity are also increasing yearly. The United Nations mandate requires every country to take Disaster Risk Reduction (DRR) actions. This research aims to create a DRR model for the Decision Support System (DSS) to make the right decisions and actions. This study uses data on disaster events in the last seven years to make prediction models for future disasters. It uses vulnerability maps and capacity maps to determine disaster risk maps. These results can be used for disaster risk reduction models to assist decision-making in formulating disaster management strategies in each disaster life cycle. Based on the simulation results, the DRR model can predict the DSS needed so that we can minimize their impacts. Issue No:Vol. 24, No. 1
Authors:Dwi Kurniati Abstract: Yogyakarta is the one of the province in Indonesia that is prone to earthquakes.This is due to Indonesia's position at the confluence of three tectonic plates. The way to overcome these, by using the Rapid Visual Screening (RVS) method. The purpose of this study to determine the results of the evaluation using the RVS method on a form filled out manually and filled by an application. The method used in this research is FEMA 154-2015 which is adjusted to the regulations in Indonesia, namely SNI 1726-2019 and the results are analyzed quantitatively. Based on the vulnerability check on the campus 1 building which is located on The North Ring Road uses the RVS High Seismicity form. The type of soil around the campus building is Hard Soil (SC). All campus buildings are the type of reinforced that is concrete frame and their functions are School. The conclusion from the results obtained is that the minimum score for all buildings is 2.3, so it stops at Level 1. In conclusion, all buildings have a risk that is not dangerous, although there must still be further supervision. Issue No:Vol. 24, No. 1
Authors:Rahayu Sulistyorini Abstract: Cities and accessibility influence each other, so the increasing activity will affect the development of the city. Demand for access and mobility is also increasing for the provision of transport infrastructure. Public transportation is one of the efforts that is expected to overcome the demand for high community activities in urban areas. Likewise, Bandar Lampung City as a growing city is required to continue to serve community activities. Based on the Rencana Tata Ruang Wilayah (RTRW) of Bandar Lampung City planning for public transportation, the City of Bandar Lampung seeks Bus Rapid Transit (BRT) services as urban transportation. The goal is to be able to reach all community activities. However, based on existing conditions, Bandar Lampung City BRT is only served by two (2) routes, namely Rajabasa-Panjang Via Dalam Kota, and Rajabasa-Panjang Via Bypass. To identify the two routes that can reach all community activities, it is necessary to do an analysis by overlaying the existing condition of BRT planning with the daily travel of the people of Bandar Lampung City. Issue No:Vol. 24, No. 1
Authors:Nouhaila Benachir, Farida Bendriaa, Taoufiq Mohib, Taoufiq Mohib Abstract: The PCM represents a sustainable alternative to reduce energy consumption for this a thermal dynamic simulation was realized with TRNSYS 204 PCM could be combined with the building materials by imbibing in complete elements, blending with the raw material during production, to compare the thermal and physical behavior of a building with walls incorporating bricks and air gap with walls incorporating PCM. The idea to use PCMfor the purpose of energy storages is to make use of the latent heat of a PCM. The simulation was carried out for the climate zone of Morocco . The results of the simulation showed that the use of phase change materials in brick walls reduced overheating in the summer period, decreasing the ambient temperature of the indoor air by 3 ° C. This walls with PCM require less energy for heating and cooling than walls without PCM during all months of the year. The results show that the presence of the phase change material in the walls allowed energy savings. Issue No:Vol. 23, No. 2
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