Authors:Arinda Leliana, Nanda Ahda Imron, Handoko Handoko, Armyta Puspitasari, Blima Oktaviastuti Pages: 1 - 7 Abstract: The reactivation plan of the Madiun-Slahung railway line in the National Railway Master Plan is the main program for the development of the railway network and service stage IV in 2026-2030, therefore it is necessary to conduct research on the demand for traction and generation as well as passenger interest in the future Madiun- This shelters are reactivated. Based on the results of data analysis and discussion of the calculation of the Madiun-Slahung area, it can be concluded that the model of the reactivation area of the Madiun-Slahung railway covers 7 districts, consisting of 45 sub-districts/villages. The method used is a household survey (Household Interview) which is intended to produce data on travel patterns and characteristics that affect the trip. The number of trip generation occurs in the range of numbers 6939-22594 motorbikes/hour for trip production and 1123-52265 motorbikes/hour for trip attraction, where zone 2, Kartoharjo sub-district has the largest number of trip production and zone 4, Ponorogo sub-district has the largest number of trip attractions. This is due to the high population, number of vehicle ownership and the strength of attraction due to the large number of shops and campuses and schools in the zone. The largest travel distribution value occurs in zone 4, because the zone is land use for shops, offices, campuses and schools. PubDate: 2023-04-25 DOI: 10.15294/jtsp.v25i1.34922 Issue No:Vol. 25, No. 1 (2023)
Authors:Aswin Lim, Ignatius Tommy Pratama, Yoghi Jo Verguson Pages: 8 - 14 Abstract: Expanded Polystyrene Beads (EPS Beads) have characteristics that are lightweight and low density. However, EPS is waste that does not pollute the soil, but has hundreds of years to decompose, thereby reducing the landfill area. Therefore, alternative disposal is to use EPS for soil improvement. The effects of different EPS beads size on the mechanical behavior of bentonite soil-cement mixture were studied using the unconfined compression test. The curing time of the mixture also varied from 7 to 28 days. The results indicate that adding EPS beads to the soil-EPS beads-cement mixture changed the behavior of the material to be more ductile. The samples could also support larger stresses at a lower strain level, less than 1 %. Furthermore, the unconfined compressive strength of the mixture of bentonite, EPS, and cement increased with increasing curing time and decreased with increasing EPS beads size. Then, adding EPS beads to the soil-cement mixture regardless of its size also promoted a larger stiffness of the samples compared to the sample with no EPS beads in the mixture. PubDate: 2023-04-25 DOI: 10.15294/jtsp.v25i1.38056 Issue No:Vol. 25, No. 1 (2023)
Authors:Hinawan Teguh Santoso, Irfan Hidayat Pages: 15 - 26 Abstract: R.H. Bridge Fisabilillah (Bridge I) is a cable-stayed bridge, included in the series of Barelang Bridges (Batam-Rempang-Galang) which were built from 1992 to 1998. With the service life of the bridge reaching 25 years, it is necessary to check the health condition of the bridge structure. Bridge cables are one of the most important elements of a cable-stayed bridge. These cable elements dominantly experience tensile forces when transmitting loads from the decks to the bridge pylons. Cable force inspection methods can be carried out through the direct measurement method (e.g. static test using a lift-off method) and indirect measurement (e.g. dynamic test using accelerometer sensors, electromagnetic/EM sensors, and so on). This study aims to compare the cable tensile force based on the static test (lift-off method) in 2017 against the dynamic test (accelerometer sensors) in 2022. Evaluation of the cable tensile force based on the dynamic test was carried out using the taut string theory and beam string theory approaches. From the study, the two empirical approaches yielded insignificantly different results where a difference in the mean difference of -1,71% was found with a maximum difference of 28,15%. The study also shows an increase in cable force capacity to a maximum of 47,20% UTS (ultimate tensile strength) based on the taut string theory and a maximum of 53.37% UTS based on the beam string theory. This value is greater when compared to the results of the cable force based on the static test (lift-off) in 2017, which was a maximum of 41.64% UTS. It is recommended to carry out further and more comprehensive studies to determine the effect of changes in cable force distribution on the behavior of the structure on the R.H. Fisabilillah Bridge. PubDate: 2023-04-25 DOI: 10.15294/jtsp.v25i1.42513 Issue No:Vol. 25, No. 1 (2023)
Authors:Endah Kanti Pangestuti, Wage Dwi Fitriyandi, Fajar Arya Ramadhan, Mohamed Nor Azhari Azman Pages: 27 - 33 Abstract: Reinforced concrete is used in various constructions, such as buildings, bridges, dams, road pavement, tunnels, etc. Structural strengthening of reinforced concrete beam can be done in various ways, which one is the addition of steel plates bonded to the compression area. Steel plates with a width of 150 mm and 300 mm with a thickness of 2 mm are expected to increase the compressive strength of reinforced concrete beams. Plate installation uses Sikadur 31 CF-Normal adhesive to attach steel plates and beams, and it is hoped that composite properties will occur on both of them. The test object samples were 5 beams consisting of 1 control beam and 4 reinforcement beams with a quality of 10 MPa. The beam sample has dimensions of 75 mm flange width and 80 mm flange height, 150 mm bottom width, 250 mm h height, 300 mm top width. The flexural strength test was carried out with a loading frame in two-point loading. The results of the study of adding plates showed an increase in beam capacity compared to the control beam. The percentage increase in beam capacity of test objects BP 1(1) and BP 1(2) with 150 mm wide plate reinforcement was 17.19% and 18.85%. The increase in beam capacity of BP 2(1) and BP 2(2) specimens with 300 mm wide plate reinforcement was 26.82% and 28.02% respectively PubDate: 2023-04-25 DOI: 10.15294/jtsp.v25i1.42863 Issue No:Vol. 25, No. 1 (2023)
Authors:Ali Zakariya, Ahmad Rifa’i, Sito Ismanti Pages: 34 - 51 Abstract: The liquefaction phenomenon affects to bearing capacity losses of building foundations. When liquefaction occurs in loose sandy soils, the pore water pressure increases, and the effective soil stress decreases significantly. This study deals with the bored pile foundation of Kretek 2 bridge, which is located in an area with high vulnerability to liquefaction. The study aimed to estimate the axial load-bearing capacity of the foundation of Kretek 2 bridge under liquefaction conditions. This study compares the results of calculations using empirical approaches with 3D numerical simulation modeling using MIDAS GTS NX. The results of the empirical calculations show a reduction in the axial bearing capacity of the foundation under liquefaction conditions of 2.88-8.16% and 2.63-7.23% for the approach of Reese and Wright 1977 and O’Neill and Reese 1989, respectively. While using 3D numerical modeling, although there was a decrease in skin resistance, there was no significant decrease in the total bearing capacity, and it was still above the design load (3632.56>3456.02 kN). Based on these results, the bearing capacity of the installed Kretek 2 Bridge foundation is still capable of receiving loads during static and liquefaction states. PubDate: 2023-04-25 DOI: 10.15294/jtsp.v25i1.42954 Issue No:Vol. 25, No. 1 (2023)
Authors:Raditya Hari Murti, Hendra Adi Wijaya, Indira Laksmi Widuri, Julmadian Abda, Mada Sophianingrum, Muhammad Rizki Islami, Ahady Farrel Febriyanto, Eduardo Erlangga Drestanta Pages: 52 - 61 Abstract: Based on data from the Semarang City Fire Department in 2013-2016, 1028 fire incidents took place in Semarang City. This incidence reached its highest in 2015 with 399 cases of fire which caused material losses of up to IDR 398.3 billion. Based on these figures, Semarang City possesses the highest incidence rate of fire cases in Central Java Province. However, studies on the risk and mitigation of fire hazard disasters in Semarang City still need to be carried out. This study aims to identify fire risks, to mitigate the disaster’s hazards in Semarang City, and to provide recommendations for arranging relevant buildings and the environment. The method used in this study is a qualitative descriptive method, in which interviews are conducted with key persons, with the utilization of GIS analysis to assess the risk of fire. The results of this study exhibit that in Semarang City, 14 villages have a high level of fire hazard risk, one of which is Rejosari Village which has the highest level of fire risk. This occurred mainly because historically, there have been many fire incidents in this area and even claiming several lives. The density of buildings and the difficulty of access further increase vulnerability in the case of fire. Nevertheless, the inhabitants still lack an understanding of this hazard. Accordingly, the fundamental mitigation to be carried out in Rejosari Village is to increase community comprehension and to consider the addition of fire protection and safety facilities, including hydrants, in densely populated buildings and areas, in order to reduce the risk of fire hazards. PubDate: 2023-04-25 DOI: 10.15294/jtsp.v25i1.42955 Issue No:Vol. 25, No. 1 (2023)
Authors:Iin Irawati, Achmad Munawar, Bagus Hario Setiadji Pages: 62 - 70 Abstract: The intersection is a significant part of the urban traffic network. One of the problems of signalized intersections is the results of an analysis that do not match the field. For the analysis of signalized border crossings in 1997 Indonesia, the Indonesia Highway Capacity Manual, a product of the 1994 data processing, was used. Traffic conditions in 1994 were, of course, different from traffic conditions today. Given the significant changes related to traffic, such as increases in the number of vehicles, land use, behavior, road geometry, and technical complexity, the 1997 IHCM needed to be improved according to the current situation. One quantity in IHCM is base saturation flow or So, which is an essential parameter in signalized intersection analysis. Base saturation flow (So) in 1997 IHCM is 600 x We. After modeling and chi-variance test of ρ value ˂0.05 in the range 675 x We to 1000 x We^85, the result is So, which is the result of the queue length approximation field is 1000 x We. PubDate: 2023-04-25 DOI: 10.15294/jtsp.v25i1.42975 Issue No:Vol. 25, No. 1 (2023)
Authors:Niza Widiana, Iman Satyarno, Suprapto Siswosukarto Pages: 71 - 80 Abstract: One of the environmentally friendly concrete as an alternative to cement concrete in the future is geopolymer concrete which used a cement substitute in the form of fly ash. To prevent premature cracking of the concrete, this study added fiber types such as polypropylene fiber, and steel fiber (dramix), this experiment with 3 variables namely the addition of polypropylene fiber by 0%, 0.40%, 0.80%, 1.2%, steel fiber of 0.25%, 0.50%, 0.75%, 1.00%, as well as a combination of polypropylene fiber and steel fiber (0.4%P;0.50%D), (0.8%P;0.75%D), (1.2%P;1.00%D) of the weight of the concrete. In this study, using a beam specimen measuring 10x10x50 cm, for each percentage of fiber usage there are 2 beam trials. Geopolymer concrete in this study uses a ratio of NaOH and Na2SiO3 is 2:1 and a constant concentration of 10 Molar, to test the Flexural Strength Test of Concrete at the age of 28 days of concrete. The results of the highest average flexural strength of geopolymer concrete without fiber σl = 78.77 kg/cm2, using polypropylene 0.80% σl =50.50 kg/cm2, and 0.25% steel fiber σl =68.87 kg/cm2, the combination of both fibers (P0.4%; D0.25%) σl =65.34 kg/cm2. These results do not produce good workability, thus affecting the decrease in flexural strength. By increasing the ratio A = 0.35 to 0.45, the geopolymer concrete mix produces better workability with the highest average flexural strength of geopolymer concrete with polypropylene fiber 0.8% σl = 80.107 kg/cm2. PubDate: 2023-04-25 DOI: 10.15294/jtsp.v25i1.40999 Issue No:Vol. 25, No. 1 (2023)
Authors:Arieska Avianda Rachmayanie, Suzanna Ratih Sari, R. Siti Rukayah Pages: 81 - 89 Abstract: One of Semarang government’s efforts to support urban tourism is airport development. It affects changes in access to and from Ahmad Yani Airport. Madukoro corridor is a priority because it is the first corridor through which migrants from outside Semarang come by air. However, there are issues related to urban tourism in Madukoro corridor, elements that are currently not optimal in supporting tourism activities in Semarang, especially those located around the PRPP destinations, Grand Maerakaca, and Kampung Laut. This study aims to find the most optimal structuring strategy in Madukoro corridor to better support urban tourism in Semarang on the coast, without neglecting its ecological conditions. To be able to explore the potential and identify problems that exist in Madukoro corridor, this research was carried out using a mixed-method in the form of a qualitative method that was quantified by weighing and rating. The study was conducted using a SWOT analysis equipped with a SWOT matrix to determine the most appropriate strategy. This research is also equipped with a strategic analysis of internal factors (IFAS) and external factors (EFAS) so that the score values can be converted on a quadrant graph to determine the type of strategy that should be used. From the results of the SWOT analysis, to develop urban tourism the strategy taken is progressive, prioritizing according to Weakness-Opportunity strategies, with implications for the physical development of city infrastructure, utilization of commercial buildings in the surrounding area, ease of accessibility to Grand Maerakaca, and Kampung Laut as well as improving the quality of the Nodes that affect the spatial pattern of regional circulation and regional landmark. PubDate: 2023-04-25 DOI: 10.15294/jtsp.v25i1.36008 Issue No:Vol. 25, No. 1 (2023)
Authors:Muhammad Faizal Ardhiansyah Arifin, Maulidiya Sarifatuzzuhriyah, Shu Sun Liu Pages: 90 - 99 Abstract: Along with Indonesia's economy and population growth, the community's need for building construction and infrastructure will also increase. Project implementation is undoubtedly expected to meet the predetermined quality, time, and cost targets, so a good project management system is needed. However, there is often a mismatch between planning time and realization due to obstacles during project performance, causing delays and over-budget on the project completion. Therefore, it is necessary to monitor the cost and time carried out in an integrated manner to estimate the total cost and time needed until the project is completed. This monitoring is used to avoid delays and cost overruns, which can be done using the Earned Value Analysis Method. This research is expected to monitor and control the time and cost required to implement the MRT-Hub Building Construction Project of Dukuh Atas Intersection to avoid losses or delays when the project is completed. The results of the analysis, based on the Earned Value Analysis Method at week 57th after the addendum, the result of the Schedule Variance (SV) is negative. In contrast, the Cost Variance (CV) is positive (+). The result of the Schedule Performance Index (SPI) is smaller than 1, while the Cost Performance Index (CPI) is greater than 1 (> 1). Thus, it is known that the project performance is running slower than the planned schedule, and the actual cost is smaller than the budget performed. Based on these results, the estimated temporary schedule (ETS) at week 57th is 188.3538 days with a remaining cost (ETC) of IDR 97,526,302,702.70. Meanwhile, the estimated project completion time (EAS) is 584.3538 days with an estimated all-cost (EAC) of IDR 171,868,372,084.14. Thus, it can be concluded that the project is expected to be -0.0606% later than the addendum schedule, with an estimated project profit of 10.0123% of the addendum budget. PubDate: 2023-04-25 DOI: 10.15294/jtsp.v25i1.43043 Issue No:Vol. 25, No. 1 (2023)
Authors:Achmad Zulfikar Armandoko, Ruzardi Ruzardi, Albani Musyafa Pages: 100 - 106 Abstract: Irrigation construction project work is a type of project that has a relatively high risk potential compared to other project work. The development of construction projects in Indonesia can be seen from the use of new methods and technologies as well as the increasing number of parties involved. Rehabilitation of the Progomanggis irrigation network is more complicated than other rehabilitation works because it covers a large area and is located in a place with difficult access. Therefore, this work is vulnerable to the risks that will arise. Based on the results of the analysis carried out, it can be concluded that the schedule for opening and closing river water in the Progomanggis Irrigation Network Rehabilitation Project has a very high risk of project performance. The impact of risk on the project is the delay in work time. Other risks are: weather conditions; changes in work methods; shunt materials; and cropping patterns of water-using communities. Risk control on the project is carried out by conducting regular coordination meetings with stakeholders and making adjustments to work methods. PubDate: 2023-04-25 DOI: 10.15294/jtsp.v25i1.43248 Issue No:Vol. 25, No. 1 (2023)
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