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  Subjects -> ENGINEERING (Total: 2298 journals)
    - CHEMICAL ENGINEERING (192 journals)
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    - ENGINEERING (1209 journals)
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CIVIL ENGINEERING (192 journals)                     

Showing 1 - 192 of 192 Journals sorted alphabetically
ACI Structural Journal     Full-text available via subscription   (Followers: 17)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 2)
Acta Structilia : Journal for the Physical and Development Sciences     Open Access   (Followers: 2)
Advances in Civil Engineering     Open Access   (Followers: 36)
Advances in Structural Engineering     Full-text available via subscription   (Followers: 28)
Agregat     Open Access  
Ambiente Construído     Open Access   (Followers: 1)
American Journal of Civil Engineering and Architecture     Open Access   (Followers: 31)
Architectural Engineering     Open Access   (Followers: 4)
Archives of Civil and Mechanical Engineering     Full-text available via subscription   (Followers: 1)
Archives of Civil Engineering     Open Access   (Followers: 10)
Archives of Hydro-Engineering and Environmental Mechanics     Open Access   (Followers: 2)
ATBU Journal of Environmental Technology     Open Access   (Followers: 4)
Australian Journal of Structural Engineering     Full-text available via subscription   (Followers: 6)
Baltic Journal of Road and Bridge Engineering     Full-text available via subscription   (Followers: 1)
BER : Building and Construction : Full Survey     Full-text available via subscription   (Followers: 10)
BER : Building Contractors' Survey     Full-text available via subscription   (Followers: 4)
BER : Building Sub-Contractors' Survey     Full-text available via subscription   (Followers: 3)
BER : Survey of Business Conditions in Building and Construction : An Executive Summary     Full-text available via subscription   (Followers: 4)
Bioinspired Materials     Open Access   (Followers: 5)
Bridge Structures : Assessment, Design and Construction     Hybrid Journal   (Followers: 16)
Building & Management     Open Access  
Building and Environment     Hybrid Journal   (Followers: 15)
Building Women     Full-text available via subscription  
Built Environment Project and Asset Management     Hybrid Journal   (Followers: 15)
Bulletin of Pridniprovsk State Academy of Civil Engineering and Architecture     Open Access   (Followers: 6)
Canadian Journal of Civil Engineering     Hybrid Journal   (Followers: 12)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 8)
Case Studies in Nondestructive Testing and Evaluation     Open Access   (Followers: 11)
Case Studies in Structural Engineering     Open Access   (Followers: 9)
Cement and Concrete Composites     Hybrid Journal   (Followers: 17)
Challenge Journal of Concrete Research Letters     Open Access   (Followers: 2)
Challenge Journal of Structural Mechanics     Open Access   (Followers: 5)
Change Over Time     Full-text available via subscription   (Followers: 2)
Civil and Environmental Engineering     Open Access   (Followers: 7)
Civil And Environmental Engineering Reports     Open Access   (Followers: 6)
Civil and Environmental Research     Open Access   (Followers: 19)
Civil Engineering = Siviele Ingenieurswese     Full-text available via subscription   (Followers: 4)
Civil Engineering and Architecture     Open Access   (Followers: 18)
Civil Engineering and Environmental Systems     Hybrid Journal   (Followers: 3)
Civil Engineering and Technology     Open Access   (Followers: 10)
Civil Engineering Dimension     Open Access   (Followers: 8)
Civil Engineering Infrastructures Journal     Open Access  
Cohesion and Structure     Full-text available via subscription   (Followers: 2)
Composite Structures     Hybrid Journal   (Followers: 270)
Computer-aided Civil and Infrastructure Engineering     Hybrid Journal   (Followers: 11)
Computers & Structures     Hybrid Journal   (Followers: 36)
Concrete Research Letters     Open Access   (Followers: 6)
Construction Economics and Building     Open Access   (Followers: 2)
Construction Engineering     Open Access   (Followers: 9)
Construction Management and Economics     Hybrid Journal   (Followers: 22)
Construction Science     Open Access   (Followers: 4)
Constructive Approximation     Hybrid Journal  
Curved and Layered Structures     Open Access   (Followers: 2)
DFI Journal : The Journal of the Deep Foundations Institute     Hybrid Journal   (Followers: 1)
Earthquake Engineering and Structural Dynamics     Hybrid Journal   (Followers: 17)
Enfoque UTE     Open Access   (Followers: 4)
Engineering Project Organization Journal     Hybrid Journal   (Followers: 7)
Engineering Structures     Hybrid Journal   (Followers: 13)
Engineering Structures and Technologies     Hybrid Journal   (Followers: 2)
Engineering, Construction and Architectural Management     Hybrid Journal   (Followers: 14)
Environmental Geotechnics     Hybrid Journal   (Followers: 5)
European Journal of Environmental and Civil Engineering     Hybrid Journal   (Followers: 9)
Fatigue & Fracture of Engineering Materials and Structures     Hybrid Journal   (Followers: 16)
Frattura ed Integrità Strutturale : Fracture and Structural Integrity     Open Access  
Frontiers in Built Environment     Open Access  
Frontiers of Structural and Civil Engineering     Hybrid Journal   (Followers: 6)
Geomaterials     Open Access   (Followers: 4)
Geosystem Engineering     Hybrid Journal   (Followers: 1)
Geotechnik     Hybrid Journal   (Followers: 3)
Géotechnique Letters     Hybrid Journal   (Followers: 7)
GISAP : Technical Sciences, Construction and Architecture     Open Access  
HBRC Journal     Open Access   (Followers: 2)
Hormigón y Acero     Full-text available via subscription  
HVAC&R Research     Hybrid Journal  
Indonesian Journal of Urban and Environmental Technology     Open Access  
Indoor and Built Environment     Hybrid Journal   (Followers: 2)
Infrastructure Asset Management     Hybrid Journal   (Followers: 2)
Infrastructures     Open Access  
Ingenio Magno     Open Access   (Followers: 1)
Insight - Non-Destructive Testing and Condition Monitoring     Full-text available via subscription   (Followers: 22)
International Journal for Service Learning in Engineering     Open Access  
International Journal of 3-D Information Modeling     Full-text available via subscription   (Followers: 3)
International Journal of Advanced Structural Engineering     Open Access   (Followers: 16)
International Journal of Civil, Mechanical and Energy Science     Open Access   (Followers: 1)
International Journal of Concrete Structures and Materials     Open Access   (Followers: 14)
International Journal of Condition Monitoring     Full-text available via subscription   (Followers: 2)
International Journal of Construction Engineering and Management     Open Access   (Followers: 9)
International Journal of Geo-Engineering     Open Access   (Followers: 3)
International Journal of Geosynthetics and Ground Engineering     Full-text available via subscription   (Followers: 4)
International Journal of Masonry Research and Innovation     Hybrid Journal   (Followers: 1)
International Journal of Pavement Research and Technology     Open Access   (Followers: 6)
International Journal of Protective Structures     Hybrid Journal   (Followers: 6)
International Journal of Steel Structures     Hybrid Journal   (Followers: 2)
International Journal of Structural Engineering     Hybrid Journal   (Followers: 10)
International Journal of Structural Integrity     Hybrid Journal   (Followers: 2)
International Journal of Structural Stability and Dynamics     Hybrid Journal   (Followers: 7)
International Journal of Sustainable Built Environment     Open Access   (Followers: 4)
International Journal of Sustainable Construction Engineering and Technology     Open Access   (Followers: 8)
International Journal on Pavement Engineering & Asphalt Technology     Open Access   (Followers: 7)
International Journal Sustainable Construction & Design     Open Access  
Journal of Bridge Engineering     Full-text available via subscription   (Followers: 15)
Journal of Building Engineering     Hybrid Journal   (Followers: 1)
Journal of Building Materials and Structures     Open Access   (Followers: 2)
Journal of Building Performance Simulation     Hybrid Journal   (Followers: 6)
Journal of Civil Engineering and Construction Technology     Open Access   (Followers: 12)
Journal of Civil Engineering and Management     Hybrid Journal   (Followers: 7)
Journal of Civil Engineering and Science     Open Access   (Followers: 8)
Journal of Civil Engineering Research     Open Access   (Followers: 6)
Journal of Civil Engineering, Science and Technology     Open Access  
Journal of Civil Society     Hybrid Journal   (Followers: 4)
Journal of Civil Structural Health Monitoring     Hybrid Journal   (Followers: 4)
Journal of Composites for Construction     Full-text available via subscription   (Followers: 13)
Journal of Computing in Civil Engineering     Full-text available via subscription   (Followers: 24)
Journal of Construction Engineering     Open Access   (Followers: 7)
Journal of Construction Engineering and Management     Full-text available via subscription   (Followers: 19)
Journal of Constructional Steel Research     Hybrid Journal   (Followers: 8)
Journal of Earth Sciences and Geotechnical Engineering     Open Access   (Followers: 4)
Journal of Fluids and Structures     Hybrid Journal   (Followers: 6)
Journal of Frontiers in Construction Engineering     Open Access   (Followers: 2)
Journal of Green Building     Full-text available via subscription   (Followers: 11)
Journal of Highway and Transportation Research and Development (English Edition)     Full-text available via subscription   (Followers: 14)
Journal of Infrastructure Systems     Full-text available via subscription   (Followers: 21)
Journal of Legal Affairs and Dispute Resolution in Engineering and Construction     Full-text available via subscription   (Followers: 5)
Journal of Marine Science and Engineering     Open Access   (Followers: 1)
Journal of Materials and Engineering Structures     Open Access   (Followers: 5)
Journal of Materials in Civil Engineering     Full-text available via subscription   (Followers: 10)
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 11)
Journal of Performance of Constructed Facilities     Full-text available via subscription   (Followers: 4)
Journal of Pipeline Systems Engineering and Practice     Full-text available via subscription   (Followers: 7)
Journal of Rehabilitation in Civil Engineering     Open Access   (Followers: 3)
Journal of Solid Waste Technology and Management     Full-text available via subscription   (Followers: 1)
Journal of Structural Engineering     Full-text available via subscription   (Followers: 40)
Journal of Structural Fire Engineering     Full-text available via subscription   (Followers: 6)
Journal of Sustainable Architecture and Civil Engineering     Open Access   (Followers: 3)
Journal of Sustainable Design and Applied Research in Innovative Engineering of the Built Environment     Open Access   (Followers: 1)
Journal of the Civil Engineering Forum     Open Access  
Journal of the South African Institution of Civil Engineering     Open Access   (Followers: 4)
Journal of Water and Environmental Nanotechnology     Open Access  
Jurnal Spektran     Open Access   (Followers: 1)
Jurnal Teknik Sipil dan Perencanaan     Open Access   (Followers: 1)
Konstruksia     Open Access  
KSCE Journal of Civil Engineering     Hybrid Journal   (Followers: 2)
Latin American Journal of Solids and Structures     Open Access   (Followers: 4)
Materiales de Construcción     Open Access  
Mathematical Modelling in Civil Engineering     Open Access   (Followers: 3)
Nondestructive Testing And Evaluation     Hybrid Journal   (Followers: 17)
npj Materials Degradation     Open Access  
Obras y Proyectos     Open Access   (Followers: 1)
Open Journal of Civil Engineering     Open Access   (Followers: 7)
Photonics and Nanostructures - Fundamentals and Applications     Hybrid Journal   (Followers: 2)
Practice Periodical on Structural Design and Construction     Full-text available via subscription   (Followers: 4)
Proceedings of the Institution of Civil Engineers - Bridge Engineering     Hybrid Journal   (Followers: 8)
Proceedings of the Institution of Civil Engineers - Civil Engineering     Hybrid Journal   (Followers: 12)
Proceedings of the Institution of Civil Engineers - Management, Procurement and Law     Hybrid Journal   (Followers: 8)
Proceedings of the Institution of Civil Engineers - Municipal Engineer     Hybrid Journal   (Followers: 3)
Proceedings of the Institution of Civil Engineers - Structures and Buildings     Hybrid Journal   (Followers: 4)
Random Structures and Algorithms     Hybrid Journal   (Followers: 5)
Research in Nondestructive Evaluation     Hybrid Journal   (Followers: 7)
Revista IBRACON de Estruturas e Materiais     Open Access   (Followers: 1)
Road Materials and Pavement Design     Hybrid Journal   (Followers: 11)
Russian Journal of Nondestructive Testing     Hybrid Journal   (Followers: 6)
Science and Engineering of Composite Materials     Hybrid Journal   (Followers: 61)
Selected Scientific Papers - Journal of Civil Engineering     Open Access   (Followers: 3)
Slovak Journal of Civil Engineering     Open Access   (Followers: 2)
Soils and foundations     Full-text available via subscription   (Followers: 5)
Steel Construction - Design and Research     Hybrid Journal   (Followers: 3)
Structural and Multidisciplinary Optimization     Hybrid Journal   (Followers: 10)
Structural Concrete     Hybrid Journal   (Followers: 11)
Structural Control and Health Monitoring     Hybrid Journal   (Followers: 9)
Structural Engineering International     Full-text available via subscription   (Followers: 12)
Structural Mechanics of Engineering Constructions and Buildings     Open Access  
Structural Safety     Hybrid Journal   (Followers: 7)
Structural Survey     Hybrid Journal  
Structure     Full-text available via subscription   (Followers: 23)
Structure and Infrastructure Engineering: Maintenance, Management, Life-Cycle Design and Performance     Hybrid Journal   (Followers: 13)
Structures     Hybrid Journal   (Followers: 1)
Study of Civil Engineering and Architecture     Open Access   (Followers: 9)
Superlattices and Microstructures     Hybrid Journal   (Followers: 2)
Surface Innovations     Hybrid Journal  
Technical Report Civil and Architectural Engineering     Open Access  
Teknik     Open Access  
The IES Journal Part A: Civil & Structural Engineering     Hybrid Journal   (Followers: 6)
The Structural Design of Tall and Special Buildings     Hybrid Journal   (Followers: 6)
Thin Films and Nanostructures     Full-text available via subscription   (Followers: 2)
Thin-Walled Structures     Hybrid Journal   (Followers: 4)
Transactions of the VŠB - Technical University of Ostrava. Construction Series     Open Access   (Followers: 1)
Transportation Geotechnics     Full-text available via subscription   (Followers: 1)
Transportation Infrastructure Geotechnology     Hybrid Journal   (Followers: 8)
Underground Space     Open Access  
Water Science & Technology     Partially Free   (Followers: 25)
Water Science and Technology : Water Supply     Partially Free   (Followers: 22)


Journal Cover KSCE Journal of Civil Engineering
  [SJR: 0.355]   [H-I: 15]   [2 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1226-7988 - ISSN (Online) 1976-3808
   Published by Springer-Verlag Homepage  [2355 journals]
  • Application of solar thermoelectric generation system for health
           monitoring system of civil infrastructures
    • Authors: Jaejun Lee; Chisoo Lim; Jaekyu Lim; Sungchul Yang; Jeonghyuk Im
      Pages: 110 - 116
      Abstract: Abstract Harvesting energy stands alone as one of the most promising techniques for approaching the global energy problem due to population growth, industrialization, and depletion of natural resources and environmental concerns. Energy harvesting technology in civil engineering is a new research territory that encompasses technologies that capture, accumulate and store the energy wasted at pavements. Their most enticing characteristic is that they already offer extended paved surfaces. This paper describes the Thermoelectric Generator (TEG) concept that was proposed and implemented to exploit the natural temperature difference between the air and an infrastructure to harvest the natural heat available. The object of this paper was to evaluate the application possibility of TEG as a future source of electrical power using civil infrastructure based on four case studies. The proposed system was composed of a TEG, conductive material, acrylic pipe, mortar specimen, and magnifying glass to verify the implementation of energy harvesting on infrastructure. In the TEG, the ambient thermal gradient between the two surfaces of the thermoelectric module was converted into electrical energy. The experimental results verified the feasibility of the proposed concept and hence of the thermoelectric harvesting of ambient thermal energy using solar heat in roadway.
      PubDate: 2018-01-01
      DOI: 10.1007/s12205-017-0945-7
      Issue No: Vol. 22, No. 1 (2018)
  • Wavelet based macrotexture analysis for pavement friction prediction
    • Authors: Guangwei Yang; Qiang Joshua Li; You Jason Zhan; Kelvin C. P. Wang; Chaohui Wang
      Pages: 117 - 124
      Abstract: Abstract Pavement friction and texture characteristics are important aspects of road safety. Despite extensive studies conducted in the past decades, knowledge gaps still remain in understanding the relationship between pavement macrotexture and surface skid resistance. This paper implements discrete wavelet transform to decompose pavement surface macrotexture profile data into multi-scale characteristics and investigate their suitability for pavement friction prediction. Pavement macrotexture and friction data were both collected within the wheel-path from six High Friction Surface Treatment sites in Oklahoma using a high-speed profiler and a Grip Tester. The collected macrotexture profiles are decomposed into multiple wavelengths, and the total and relative energy components are calculated as indicators to represent macrotexture characteristics at various wavelengths. Correlation analysis is performed to examine the contribution of the energy indicators on pavement friction. The macrotexture energy within wavelengths from 0.97 mm to 3.86 mm contributes positively to pavement friction while that within wavelengths from 15.44 mm to 61.77 mm shows negative impacts. Subsequently, pavement friction prediction model is developed using multivariate linear regressive analysis incorporating the macrotexture energy indicators. Comparisons between predicted and monitored friction data demonstrates the robustness of the proposed friction prediction model.
      PubDate: 2018-01-01
      DOI: 10.1007/s12205-017-1165-x
      Issue No: Vol. 22, No. 1 (2018)
  • Numerical modeling of long term reservoir sedimentation in semi-two
           dimensional manner
    • Authors: Jungkyu Ahn; Chang Geun Song
      Pages: 135 - 140
      Abstract: Abstract Reservoir sedimentation reduces the benefits from the storage of fresh water. The volume and distribution of sediment deposition must be predicted for a long term reservoir operation plan. Either or both experimental and numerical modeling can be applicable for an evaluation of reservoir sedimentation. Because sedimentation occurs along entire reservoirs and throughout the reservoir life span, a one-dimensional numerical sediment transport model, GSTARS, was considered in this study. Even though the model is not a truly two or three dimensional one, the model has capability of simulating channel geometric change in a semi-two dimensional manner using the stream tube concept. In this study, the effect of the number of stream tubes on the performance of the numerical simulation was analyzed using 14 years of real reservoir sedimentation data, and reasonable results were produced with three stream tubes. The densities of the deposited sediment depend on the reservoir operation scheme, especially for clay and silt. It was found that the predicted results vary with the density, and the prediction with various density with respect to location is required for a study reach where reservoir and river regions exit together.
      PubDate: 2018-01-01
      DOI: 10.1007/s12205-017-1086-8
      Issue No: Vol. 22, No. 1 (2018)
  • Properties and reaction mechanisms of magnesium phosphate cement mixed
           with acetic acid
    • Authors: Jun Li; Yong-sheng Ji; Guo-dong Huang; Zhan-zhan Xu; Gui-hong Yan
      Pages: 231 - 235
      Abstract: Objective This study aims to improve the coagulation time, strength, and construction cost of magnesium phosphate cement. Methods We analyzed the microstructure changes in the hardened magnesium phosphate cement paste through qualitative analysis, quantitative test, microscopic examination, and research regarding adding different concentrations of acetic acid on magnesium phosphate cement slurry time, effects of flow resistance, and mechanical properties. Results When a moderate amount of AA was used, the setting time of MAPC mortar was significantly prolonged but was later reduced as the concentration increased. In the early phase, the degree of MAPC mortar hydration increased, whereas compressive strength significantly increased initially and increased slowly in the later phase. The crystal morphology and size of MAPC hydrates changed, and hardened MAPC became more compact in structure. The AA absorbed some ammonia in the MAPC condensation. Conclusion Acetic acid can effectively regulate coagulation time, induce early hydration reaction rate, and improve the performance of magnesium phosphate cement, which can reduce the construction cost of magnesium phosphate cement.
      PubDate: 2018-01-01
      DOI: 10.1007/s12205-017-1408-x
      Issue No: Vol. 22, No. 1 (2018)
  • Probabilistic assessment of meteorological drought over South Korea under
           RCP scenarios using a hidden Markov model
    • Authors: Jisoo Yu; Yei Jun Park; Hyun-Han Kwon; Tae-Woong Kim
      Pages: 365 - 372
      Abstract: Abstract Most drought indices are evaluated based on pre-defined thresholds, which are inadequate for demonstrating the inherent uncertainty of drought. This study employed a hidden Markov model-based drought index (HMM-DI) for probabilistic assessment of meteorological drought in South Korea. The HMM-DI was developed to take into account the inherent uncertainty embedded in daily precipitation and to assess drought severity without using pre-defined thresholds. Daily rainfall data recorded during 1973–2015 at 56 stations over South Korea were aggregated with 6- and 12-month windows to develop HMM-DIs for various time scales. The HMM-DIs were extended to assess future droughts in South Korea using synthesized monthly rainfall data (2016–2100) under Representative Concentration Pathway (RCP) 4.5 and 8.5 scenarios. The overall results indicated that the HMM-DI can classify drought conditions considering inherent uncertainty embedded in observations and can also demonstrate the probabilistic drought occurrence in the future.
      PubDate: 2018-01-01
      DOI: 10.1007/s12205-017-0788-2
      Issue No: Vol. 22, No. 1 (2018)
  • Effect of global warming on chloride ion erosion risks for offshore RC
           bridges in China
    • Authors: Hui-Bing Xie; Yuan-Feng Wang; Jian Gong; Ming-Hui Liu; Xiao-Yuan Yang
      Abstract: Abstract Chloride ion penetration, which leads to corrosion of steel reinforcement, is the leading cause of offshore reinforced concrete bridge deterioration. Global warming would accelerate the process of chloride ion penetration and then structural degradation. In China, durability design code for concrete structures has been issued in 2008, and some thresholds of design parameters have been specified to mitigate corrosion in concrete bridge. However, influence of global warming on structure durability was not considered in the issued code. This would overestimate the durability of concrete structures. In this paper, a reliability based method was adopted to evaluate the influence of climate change on the durability of offshore RC bridges considering the acceleration of chloride ion penetration caused by temperature rise. Two climate change scenarios according to IPCC report were considered to define the global warming. A baseline scenario, in which the mean average temperature equals to that of the year 2000, were defined. It is found that the amount of chloride ion on the surface of reinforcing steel bar in the global warming scenarios are 6%-15% higher than that of structure in the baseline scenario. Meanwhile, the probability of corrosion initiation and corrosion damage increased also. In 2100, structures in environmental categories III-C and III-F, designed according to Chinese codes, can no longer adapt the impact of climate change on structure. Comparison of reliability of improved and pre-improved structure was conducted to verify the effectiveness of the proposed improvement measures.
      PubDate: 2018-01-12
      DOI: 10.1007/s12205-018-1547-8
  • A study of the load allocation using watershed model and load duration
           curve in TMDL
    • Authors: Eun Jeong Lee; Tae Geun Kim; Kyoung-sik Choi
      Abstract: Abstract Total Maximum Daily Load (TMDL) system in Korea is a system that manages the discharge load per unit watershed to achieve the water quality target under the conditions of the six month flow (Q275) and the low water discharge (Q185). However, since the flow conditions of water quality are various in each unit watershed, it is necessary to understand the effect of improving the water quality by flow duration analysis in order to operate an effective TMDL. In this study, the HSPF model was operated by the flow and TP after calibration and verification, and the Low Duration Curve (LDC) was created using simulation results. LDC was used to calculate the excess rate of the water quality target for each flow condition. The scenario to install the artificial wetland was applied to the model for the water quality target and the achievement of the water quality target by the flow duration analysis was evaluated. In addition, the management system of TMDL in Korea would be developed more scientifically by suggesting the allocation load considering the baseline discharge and the safety discharge so that the water quality target can be achieved by the flow duration analysis in the study area.
      PubDate: 2018-01-12
      DOI: 10.1007/s12205-018-0910-0
  • Mapping the influence of project management on project cost
    • Authors: Haiyan Jin; Liyin Shen; Zheng Wang
      Abstract: Abstract This paper develops a framework to map the influence of Project Management (PM) attributes on project cost and then tests these relationships between PM attributes and project cost on industrial construction projects. PM attributes are identified and classified into five areas: Human Resource Management (HRM), function of PM, partnering and supply chain, design efficiency, and quality. The framework model is tested on survey data from member companies of the Construction Industry Institute (CII) using the Structural Equation Modeling method. The results reveal that quality, function of PM, and HRM can have a significant positive impact on project cost. Quality is found to have the most direct and greatest impact on project cost efficiency among PM attributes. The goal of this statistical study is to demonstrate the paths and strengths of the effects of PM attributes on project cost.
      PubDate: 2018-01-12
      DOI: 10.1007/s12205-018-0397-8
  • Assessment of ensemble flood forecasting with numerical weather prediction
           by considering spatial shift of rainfall fields
    • Authors: Wansik Yu; Eiichi Nakakita; Sunmin Kim; Kosei Yamaguchi
      Abstract: Abstract This study evaluated the ensemble flood forecasting by using ensemble forecast outputs of the Numerical Weather Prediction (NWP) model with a distributed hydrologic model. Ensemble NWP rainfall with a 2 km horizontal resolution and 30 hour forecast time was assessed whether it can produce suitable rainfall compared with the deterministic rainfall forecast during the typhoon TALAS, 2011. The ensemble flood forecast based on ensemble NWP rainfall was also assessed for hydrological applications. This study presents a methodology using the spatial movement of ensemble rainfall field in order to improve the accuracy of ensemble flood prediction considering the location correction of Quantitative Precipitation Forecast (QPF). This study was conducted using the largest flood events occurred by typhoon TALAS in 2011 with regard to the Futatsuno (356.1 km2) and Nanairo (182.1 km2) dam catchments in the Shingu river basin (2,360 km2) located in Kii Peninsula of Japan. As a result, the flood prediction using the spatial movement of ensemble rainfall field could improve the under-predicted interval of the flood prediction using the original ensemble rainfall. In addition, it was able to reproduce the peak discharge in the first and second prediction intervals for both catchments and to cover the observed value. The method we proposed in this study can be used in hydrological applications such as real-time flood prediction including flood prediction and warning systems, optimized discharge flow for dam operation.
      PubDate: 2018-01-12
      DOI: 10.1007/s12205-018-0407-x
  • Experimental study on bond performances of track slab and mortar based on
           DIC technology
    • Authors: Chengguang Su; Dan Liu; Chenxu Ding; Chuang Gong; Pingrui Zhao; Xueyi Liu
      Abstract: Abstract In order to guarantee the normal long-time service performance of CRST II slab track, it is necessary to study the interface parameters between track slab and CA mortar layer of CRTS II slab track. Thus the splitting and shearing model test of concrete and mortar bonded composite specimens were conducted. Based on the Digital Image Correlation (DIC) technology, the stress-strain relationship and cohesion model parameters were obtained from the interface displacement and distribution of strain. The results showed that: The displacement and the strain field distribution of the composite specimens as well as the whole interlaminar cracking process of initiation, propagation and failure can be well described with DIC. The bond failure between the track slab and the CA mortar layer is part of the brittle failure, and the normal and tangent interface tension-displacements are both bilinear. The shear strength between the track slab and the CA mortar layer is 1.82 MPa with the peak strain of 2.49 × 10−4 and the secant modulus of 7.30 × 103 MPa; While the shear strength is 2.40 MPa with the peak strain of 6.17 × 10−3 and the secant modulus of 3.89 × 102 MPa. When the shear strain is about 7.5×10-4, the shear stress-strain curve tends to remain stable. At this point, the shear strain is 0.12 times of the peak strain. Parameters of the cohesive zone model between the track slab and the CA mortar layer are suggested as follows: the normal cohesive strength is 1.792 MPa with the interface stiffness of 708.485 MPa/mm and the critical fracture energy of 0.0252 mJ/mm2; the tangential cohesive strength is 0.956 MPa with the interface stiffness of 63.039 MPa/mm and the critical fracture of 0.018 mJ/mm2.
      PubDate: 2018-01-12
      DOI: 10.1007/s12205-018-0848-2
  • Multivariate probabilistic seismic demand model for the bridge
           multidimensional fragility analysis
    • Authors: Qi’ang Wang; Ziyan Wu; Shukui Liu
      Abstract: Abstract Seismic fragility analysis for bridges is an essential issue for risk assessment of transportation networks exposed to seismic hazards. Considering multiple Performance Limit States (PLSs) and seismic demand parameters, the study proposes a multidimensional fragility evaluation methodology for engineering structures, and the objective of the paper is to show that the uncertainty and dependence between seismic demand parameters should be considered for fragility analysis. Thus, a new Probabilistic Seismic Demand Model (PSDM) following multivariate logarithmic normal distribution is addressed. Taking PLS correlation into consideration, multidimensional PLS formula is constructed to identify the structural failure domain. A RC bridge is studied to show the proposed theory. To consider bridge column plastic deformation and bearing nonlinear characteristic, nonlinear dynamic analyses are carried out. The bridge multidimensional fragility curves are derived and compared with fragility curves for an individual component. Results indicate that uncertainty and dependence of demand parameters can be properly dealt with by the multivariate PSDM. The multidimensional fragility is higher than fragility of any individual component, and the bridge as a system is more fragile. The ignorance of multiple components contribution to the system will generate an overestimation for the whole structural performance, which is adverse to engineering structural safety.
      PubDate: 2018-01-12
      DOI: 10.1007/s12205-018-0414-y
  • Cyclic and post-cyclic shear behaviour of interface between geogrid and
           EPS beads-sand backfill
    • Authors: Reza Alaie; Reza Jamshidi Chenari
      Abstract: Abstract Lightweight sand–EPS beads composite is a new artificial geo-material, which has been recently found applications in geotechnical engineering projects. A series of laboratory tests were carried out using a large-scale cyclic direct shear test apparatus to evaluate the monotonic, cyclic and post-cyclic behaviour of an interface between EPS-sand mixtures and a Polyfelt geogrid. EPS were added to sand at 0%, 0.5%, 1%, and 2% by weight. Tests were conducted under three different vertical stresses (30 kPa, 60 kPa and 90 kPa). The influences of cyclic shear semi-amplitude, number of cycles and normal stress on interface properties are investigated. The test results revealed that for a given strain level, interface shear stiffness decreases and damping ratio was shown to increase with increasing EPS content. Hardening behaviour was observed with the number of cycles under different normal stress levels and EPS contents. The EPS-sand-geogrid specimens did not develop clear peak shear stress at monotonic and post-cyclic direct shear tests. The EPS-sand-geogrid mixtures represent an overall contraction behaviour in monotonic, cyclic and post-cyclic stages. The apparent adhesion of interface was shown to increase and the friction angle of interface to decrease with EPS content.
      PubDate: 2018-01-12
      DOI: 10.1007/s12205-018-0945-2
  • Experimental study on the permeability characteristics of sandstone in
           different chemical solutions
    • Authors: Huayan Yao; Zhenhua Zhang; Dezhong Li
      Abstract: Abstract Groundwater seepage is one of the important factors which affect the physical and mechanical properties of soft rock. In this study, the permeability evolution of sandstone was investigated using water solution seepage tests with different pH values. The results show that the chemical nature of the solutions has a great influence on the evolution of the permeability coefficients of sandstone specimens. Over time, it was determined that the permeability coefficient under the solution with PH = 2 was significantly greater than those under the PH = 7 and PH = 12 solutions used in this study. During the infiltrations, the ions of H+ and OH- which were involved in the water-rock interaction made the pH value of the solution change with different degrees. After the seepage, the ions in the solutions changed significantly. The ion concentrations seeping from sandstone specimen in the acidic solution, such as Ca2+, Mg2+, Fe3+ (Fe2+), Al3+ and K+, were found to be much greater than in the neutral and alkaline solutions. However, the ion concentrations seeping from sandstone specimen in the neutral solution displayed little differences from those in the alkaline solution. The concentration of the Si ion in the alkaline solution was much higher than those of the acid and neutral solutions, and the concentration of the acid solution was slightly higher than that of the neutral solution. The changes in the ion concentration in the osmotic solution reflected that there had been different forms of chemical reactions between the minerals of the sandstone and the solutions. The seepage pressures also had some effects on the permeability coefficients, pH values, and concentrations of ions in the solutions. After the seepage tests, the rock microstructures were observed by the means of a Scanning Electron Microscope (SEM). The results show that some new holes have been formed in the sandstone specimen due to the seepage, especially in the sample with the acid solution. The internal structural changes of the sandstone are found to be the main reasons for the changes in the permeability coefficients.
      PubDate: 2018-01-12
      DOI: 10.1007/s12205-018-1611-4
  • Blast Furnace Slag addition effects on Delayed Ettringite Formation in
           heat-cured mortars
    • Authors: Walid Deboucha; Nordine Leklou; Abdelhafid Khelidj
      Abstract: Abstract Reducing expansion due to Delayed Ettringite Formation (DEF) is becoming an important issue that must be taken into account, when producing heat-cured concrete. Mineral additives used as partial cement replacement should help in achieving the desired aspect. Based on an ongoing experimental program, this research emphasizes on the effect of Blast Furnace Slag (BFS) on the expansion of cement mortars caused by DEF. For this purpose, mortar prisms in which Portland cement was replaced by BFS, with three different replacement levels (10,20 and 40%) and two finenesses degree (400 and 500 m2/kg) were tested in length change, dynamic elasticity modulus and compressive strength over more than 750 days. Results showed that the efficiency of blast furnace slag in controlling expansion related to DEF was conditioned by its levels of replacement.
      PubDate: 2018-01-08
      DOI: 10.1007/s12205-017-0642-6
  • Effect analysis regarding different scenarios to improve water quality of
           the Lake Paldang basin in Korea
    • Authors: Hye-Cheol Oh; Yoshihisa Shimizu; Seog-Ku Kim
      Abstract: Abstract The object of this research is to analyze the water quality improvement of Lake Paldang by implementing Integrated Lake Basin Management (ILBM). To establish ILBM, the basin environment database was built as well as water environment management support system for monitoring present conditions, and predicting changes in basin environment. The major contaminants in Lake Paldang Basin are from domestic pollution, agricultural land, and livestock. Scenarios for reducing contaminants were targeting the increase percentage of sewered population, agricultural and livestock contaminants reduction to analyze the water quality improvement effects. This study applied the SWAT model to Lake Paldang Basin using the basin environment database to improve the water quality of Lake Paldang in Korea. The results of calibration and validation of flow rate, Suspended Solids (SS), Total Nitrogen (TN) and Total Phosphorus (TP) showed that the measurement values and simulation values turned out to be similar, and that it is possible to apply the SWAT model to Lake Paldang Basin. The reduction efficiency of SS by scenario was 11-45%, TN 8-37%, and TP 7-35% and this shows that water quality was significantly improved prior to application. Therefore, to improve the water quality of Lake Paldang, it is recommended to implement the ILBM which is considered to play an important role in making water quality management policy in Korea.
      PubDate: 2018-01-08
      DOI: 10.1007/s12205-017-1305-3
  • Reduction of mean wind forces on photovoltaic system using aerodynamic
    • Authors: Proshit Kumar Saha; Akihito Yoshida; Rei Okada; Yukio Tamura
      Abstract: Abstract This paper describes the results of scale-model wind-tunnel testing of a unique ground-mounted solar photovoltaic (PV) conducted in smooth flow for a single wind direction. The mean wind forces and moments were measured using a six-component High Frequency Force Balance (HFFB). The measured wind loads on the PV system were comparable to those in the Japanese standards. The mitigation effects of aerodynamic appendages such as hanging walls and eaves are reported. The maximum reduction of meanwind- force and moment coefficients occurred with an exterior hanging wall plate with a 70% solidity ratio.
      PubDate: 2018-01-08
      DOI: 10.1007/s12205-017-1060-5
  • Model for filtering the outliers in DSRC travel time data on interrupted
           traffic flow sections
    • Authors: Hyunsuk Park; Youngchan Kim
      Abstract: Abstract This study aims to develop a model that effectively filters outliers in travel time data obtained by using the DSRC on interrupted traffic flow sections. To establish a direction for model development, we identified the characteristics of the DSRC system and existing abnormal data filtering models, causes of outliers in travel time data and their distribution center, changes in the travel time distribution according to the section length and existence of traffic congestion, variation in the number of data samples obtained, and the status of missing data. When an existing model is used to filter the abnormal travel time data obtained on the interrupted traffic flow sections, the mean and median values derived based on the asymmetry of the travel time distribution deviate from the center of the travel time distribution, which leads to fundamental errors in the estimation of the size of the normal travel time data distribution. Moreover, the performance of this model for filtering abnormal data decreases because of the distorted mean and standard deviation when outliers are mixed and optimizing filtering variables is difficult. To overcome these limitations of existing outlier filtering models, we developed a novel outlier filtering model by establishing a model development direction to improve the methods of obtaining data, setting the travel time distribution center, estimating distribution size, and filtering repetitive outliers. The performance of the developed model in filtering outliers is verified by comparing it with that of existing models for the intelligent transport systems installed on 13 types of single-sections and multi-section on the metropolitan national highway, Korea. The comparison indicates that the developed model generally exhibits the best performance for filtering abnormal data on all types of sections. The normal filtering ratio of the developed model was maintained at over 98.5% for all road types and traffic situations, demonstrating improvement of up to 27.4%. The error ratio of travel time at short interrupted traffic flow sections during non-congestion is significantly improved in this model.
      PubDate: 2018-01-08
      DOI: 10.1007/s12205-017-1333-z
  • The grain-based model numerical simulation of unconfined compressive
           strength experiment under thermal-mechanical coupling effect
    • Authors: Zhongyuan Xu; Tianbin Li; Guoqing Chen; Chunchi Ma; Shili Qiu; Zhi Li
      Abstract: Abstract PFC-GBM (Particle Flow Code-Grain Based Model) is the major and fundamental method to simulate rock behaviors in this paper. Geo-materials are composed of micro-grains, the behavior of these grains and the interface between them influence macroscopic behavior of materials. Traditional PFC simulation method could simulate the integral micro-behavior of material, and PFC-GBM simulation focuses on every different grains and interfaces to simulate micro-heterogeneity of material. In this paper, an attempt is made to investigate the strength of rock masses and the development of micro-cracks under thermal-mechanical coupling effect. For this purpose, a numerical model is established based on mineral analysis and pre-existing mechanical experiments of Granite from one of complex tunnels in Yunnan Province. After establishing the model, the specimen were first heated and then compressed according to test sequence of laboratory experiments. The simulation results are calibrated to match the laboratory test results including thermal behaviors and fracture development. The conclusion of simulations show that both of thermal behaviors and fracture development are depended on the micro-heterogeneity of granite in UCS (Unconfined Compressive Strength) experiment, the characteristics of minerals influence the macroscopic fracture mechanism. The simulation reveals that in a certain range of temperature (40°C ~ 90°C), temperature increasing enhance the brittle damage of granite. The situation of 130°C had the obvious thermal-crack before loading and then exhibited a much lower peak strength and failure strain. This numerical observation may guide the underground construction in complex geo-environment.
      PubDate: 2018-01-08
      DOI: 10.1007/s12205-017-1228-z
  • Application of type-2 interval fuzzy sets to contractor qualification
    • Authors: Michał Tomczak; Piotr Jaśkowski
      Abstract: Abstract The selection of a general contractor for construction works is one of the most important decisions made throughout the entire construction project. It may be decisive in the success or failure of the project (e.g. delays in the commissioning of works, exceeding the budget, low quality of works). The article presents a method for supporting group decision-making in the contractor qualification process. The proposed method is a development of Mikhailov's approach to Fuzzy Analytic Hierarchy Process. It consists in the aggregation of the decision makers' judgments using type-2 fuzzy sets, allowing for inaccuracy of the decision-maker’s assessment. The use of an unbiased estimator of standard deviation for determining compromise evaluation enables the small size of the expert group and deviations in their evaluations to be taken into consideration. The quality of the solution obtained through this method was compared with the results obtained by means of Mikhailov’s Fuzzy Preference Programming and Enea & Piazza Method. The use of the proposed method generated better results for this example of preparing a ranking of contractors than the two other methods discussed. The method presented herein may also be proposed for solving decision-making problems in other spheres.
      PubDate: 2018-01-08
      DOI: 10.1007/s12205-017-0431-2
  • The optimisation of the selection of means of transport for the
           implementation of chosen construction projects
    • Authors: Artur Duchaczek; Dariusz Skorupka
      Abstract: Abstract The proper implementation of a transport process is influenced among others, by vehicles, which carry construction materials stored in warehouses and on construction sites. During performing transport undertakings related to the logistic support of various types of construction investments one often has to deal with tasks linked to the need of multi-criterial decision-making. The paper puts forward a proposal for a simple optimisation method, while making an assessment of its pros and cons at the same time. An important advantage of the proposed method is that it has a simple and transparent calculation algorithm. It is therefore recommendable to apply in engineering practice. In the optimisation process, coefficients of importance of each criterion allow account to be taken of individual preferences of a decision maker. Thus, they are one of the key elements of this process. In this paper the DEMATEL method was applied to calculate these coefficients. Currently in Poland there are several well-known and recognised companies specialising in the sale of trucks, yet in this work only Volvo vehicles were taken into consideration in analyses.
      PubDate: 2018-01-08
      DOI: 10.1007/s12205-017-0280-z
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