Abstract This study was conducted to investigate the effect of variations in the asphaltic concrete core Rockfill dam geometric parameters on the core behavior at different upper, middle, and lower points under two-dimensional static stress-strain analysis. The mentioned analysis was performed using SIGMA/W software. In the modeling and analysis process, the geometry of a large number of dams constructed around the world was studied and many numerical models with variations in eight classes of height, three dams upstream/downstream slope modes, and three different asphaltic core positions and thicknesses on a rigid foundation were created and analyzed. In addition, for each of the above models, four dam operation stages including “End of Construction”, “Full Reservoir”, “Half-Full Reservoir”, and “Rapid Drawdown” were considered. The results show, in four different stages of construction and impounding and three different slope modes, the maximum stress as well as horizontal and vertical displacements at the upper, middle, and lower points of the core increase with increasing height. In all models, increasing upstream and downstream slopes results in an increase in the amount of vertical displacement for all construction and impounding stages at the upper, middle, and lower points of the core. In the middle and lower points of the core, with increasing height, the amount of deviatoric stress increases for all construction and impounding conditions. In addition, for all operation cases, the maximum strain increases in all points of the vertical and tilted cores as the core thickness increases. Additional results are presented in the next sections.
{"title":"Static Parametric Stress-Strain Analysis for Asphaltic Concrete Core of Rockfill Dams","authors":"Shahram Shiravi","doi":"10.2478/jaes-2022-0013","DOIUrl":"https://doi.org/10.2478/jaes-2022-0013","url":null,"abstract":"Abstract This study was conducted to investigate the effect of variations in the asphaltic concrete core Rockfill dam geometric parameters on the core behavior at different upper, middle, and lower points under two-dimensional static stress-strain analysis. The mentioned analysis was performed using SIGMA/W software. In the modeling and analysis process, the geometry of a large number of dams constructed around the world was studied and many numerical models with variations in eight classes of height, three dams upstream/downstream slope modes, and three different asphaltic core positions and thicknesses on a rigid foundation were created and analyzed. In addition, for each of the above models, four dam operation stages including “End of Construction”, “Full Reservoir”, “Half-Full Reservoir”, and “Rapid Drawdown” were considered. The results show, in four different stages of construction and impounding and three different slope modes, the maximum stress as well as horizontal and vertical displacements at the upper, middle, and lower points of the core increase with increasing height. In all models, increasing upstream and downstream slopes results in an increase in the amount of vertical displacement for all construction and impounding stages at the upper, middle, and lower points of the core. In the middle and lower points of the core, with increasing height, the amount of deviatoric stress increases for all construction and impounding conditions. In addition, for all operation cases, the maximum strain increases in all points of the vertical and tilted cores as the core thickness increases. Additional results are presented in the next sections.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"12 1","pages":"87 - 96"},"PeriodicalIF":1.1,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45263641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Bachayo, A. Memon, M. Hussain, I. Rahman, S. Ahmed
Abstract Construction waste is a global concern among the practitioners and has got attention of the researchers for many years. This issue is serious in construction industry of Pakistan also and various researchers have contributed in addressing it. This paper identified design and procurement related factors and assessed their risk level in causing construction waste. Data was collected through questionnaire survey amongst the practitioners from client consultants and contractors working on construction projects in Karachi and Hyderabad division of the Sind province. A total of 72 completed questionnaire forms were analysed and the results shows that 8 of the 20 factors are highly important factors and fall in the red zone of the risk matrix. It was also observed that last minute client requirements is reported as most important factor in design related issues while “items not in compliance with specification” is the most risk factor in the category of the procurement. Besides these, “last minute client requirements” and “Mistakes in quantity surveys” are the key factors which have significant effect on project cost. The findings of this study will be helpful for the practitioner to improve design and procurement quality for controlling the waste generation.
{"title":"Risk Level of Design and Procurement Factors Causing Construction Waste Generation","authors":"A. Bachayo, A. Memon, M. Hussain, I. Rahman, S. Ahmed","doi":"10.2478/jaes-2022-0002","DOIUrl":"https://doi.org/10.2478/jaes-2022-0002","url":null,"abstract":"Abstract Construction waste is a global concern among the practitioners and has got attention of the researchers for many years. This issue is serious in construction industry of Pakistan also and various researchers have contributed in addressing it. This paper identified design and procurement related factors and assessed their risk level in causing construction waste. Data was collected through questionnaire survey amongst the practitioners from client consultants and contractors working on construction projects in Karachi and Hyderabad division of the Sind province. A total of 72 completed questionnaire forms were analysed and the results shows that 8 of the 20 factors are highly important factors and fall in the red zone of the risk matrix. It was also observed that last minute client requirements is reported as most important factor in design related issues while “items not in compliance with specification” is the most risk factor in the category of the procurement. Besides these, “last minute client requirements” and “Mistakes in quantity surveys” are the key factors which have significant effect on project cost. The findings of this study will be helpful for the practitioner to improve design and procurement quality for controlling the waste generation.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"12 1","pages":"11 - 16"},"PeriodicalIF":1.1,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44175534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. H. Wagan, A. H. Memon, N. Memon, F. T. Memon, M. H. Lashari
Abstract To reduce the consumption of cement in construction industry has been a hot area of consideration now days due to high evolution of CO2 gases during its production. Since decades efforts are made to replace cement with cementitious materials; minerals, agricultural, industrial by products etc. A few are fly ash, ground granulated blast furnace slag, silica fume, rice husk ash etc. These cementitious materials are often adopted as partial replacement of cement. However, their effectiveness and suitability as cementitious material depends upon their properties and the source of the production. Pakistan is an agricultural country and one of the major crops is Rice crop. It produces a substantial amount of rice husk during the processing g of the rice. A substantial amount of Rice Husk Ash (RHA) is produced on the burning of rice husk used as fuel in the rice mills while generating steam for parboiling process of rice grains. This ash causes the environmental problems also if not dumped properly. RHA is believed to have siliceous properties which may be used as supplementary cementitious material in concrete. As the suitability of supplementary cementitious materials is dependent upon the source of rice husk, temperature of burning of husk, its fineness and other properties. This study is focused on to determine the effect of rice husk ash produced by burning of the rice husk obtained from the local rice mills. Experimental investigation carried includes the determination of workability and compressive strength of concrete with different dosage of RHA from 5% to 30% with an increment of 5% tested at 1day, 3days, 7days and 28 days of the age of concrete. The results are compared with corresponding concrete without RHA and tested at the same ages. The results show the reduction in both the parameter; workability and compressive strength due to RHA particularly at its higher dosage beyond 10% by weight of cement.
{"title":"Rice Husk Ash (RHA) Based Concrete: Workability and Compressive Strength with Different Dosages and Curing Ages","authors":"I. H. Wagan, A. H. Memon, N. Memon, F. T. Memon, M. H. Lashari","doi":"10.2478/jaes-2022-0016","DOIUrl":"https://doi.org/10.2478/jaes-2022-0016","url":null,"abstract":"Abstract To reduce the consumption of cement in construction industry has been a hot area of consideration now days due to high evolution of CO2 gases during its production. Since decades efforts are made to replace cement with cementitious materials; minerals, agricultural, industrial by products etc. A few are fly ash, ground granulated blast furnace slag, silica fume, rice husk ash etc. These cementitious materials are often adopted as partial replacement of cement. However, their effectiveness and suitability as cementitious material depends upon their properties and the source of the production. Pakistan is an agricultural country and one of the major crops is Rice crop. It produces a substantial amount of rice husk during the processing g of the rice. A substantial amount of Rice Husk Ash (RHA) is produced on the burning of rice husk used as fuel in the rice mills while generating steam for parboiling process of rice grains. This ash causes the environmental problems also if not dumped properly. RHA is believed to have siliceous properties which may be used as supplementary cementitious material in concrete. As the suitability of supplementary cementitious materials is dependent upon the source of rice husk, temperature of burning of husk, its fineness and other properties. This study is focused on to determine the effect of rice husk ash produced by burning of the rice husk obtained from the local rice mills. Experimental investigation carried includes the determination of workability and compressive strength of concrete with different dosage of RHA from 5% to 30% with an increment of 5% tested at 1day, 3days, 7days and 28 days of the age of concrete. The results are compared with corresponding concrete without RHA and tested at the same ages. The results show the reduction in both the parameter; workability and compressive strength due to RHA particularly at its higher dosage beyond 10% by weight of cement.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"12 1","pages":"113 - 120"},"PeriodicalIF":1.1,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42199515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Szabo, T. Kovács, G. Ionescu, K. Cziszter, Daniela-Smaranda Ionescu, A.F. Sărăcuț-Ardelean
Abstract Water Supply Systems (WSS) can very well be dubbed as the backbone of every major human settlement for thousands of years at this point as every major human settlement throughout history has, regardless of time period or rural/urban erection or evolution has had its emplacement close to if not dead center over a significant water source that can provide this valuable and desperately needed resource to the populace. Of course, with the passage of time and the ever increasing number of the population and their life style, new techniques and technologies were incorporated within the grand design of the water supply pipeline, mainly automation and operation reliability boosts by means of electricity. It is a given that electrical current is not cheap to produce and maintain, although it is a field of ongoing study and research when it comes to optimizing the energy consumption of any system that runs on this costly resource, both for making the overall operation of the entire system more reliable but also more economical, all the while taking inspiration of multiple specialty works published within this field and, of course, already established local and European Union standards within Romania.
{"title":"Comparative Studies and Research on Optimizing Electric Consumption of Water Supply Systems","authors":"S. Szabo, T. Kovács, G. Ionescu, K. Cziszter, Daniela-Smaranda Ionescu, A.F. Sărăcuț-Ardelean","doi":"10.2478/jaes-2022-0014","DOIUrl":"https://doi.org/10.2478/jaes-2022-0014","url":null,"abstract":"Abstract Water Supply Systems (WSS) can very well be dubbed as the backbone of every major human settlement for thousands of years at this point as every major human settlement throughout history has, regardless of time period or rural/urban erection or evolution has had its emplacement close to if not dead center over a significant water source that can provide this valuable and desperately needed resource to the populace. Of course, with the passage of time and the ever increasing number of the population and their life style, new techniques and technologies were incorporated within the grand design of the water supply pipeline, mainly automation and operation reliability boosts by means of electricity. It is a given that electrical current is not cheap to produce and maintain, although it is a field of ongoing study and research when it comes to optimizing the energy consumption of any system that runs on this costly resource, both for making the overall operation of the entire system more reliable but also more economical, all the while taking inspiration of multiple specialty works published within this field and, of course, already established local and European Union standards within Romania.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"12 1","pages":"97 - 106"},"PeriodicalIF":1.1,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46036582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sibel Sağlıyan, E. Yalçın, K. E. Alyamaç, C. Polat
Abstract The aim of this study is to investigate the fresh and hardened properties of the self-compacting heavy-weight concrete (SCHWC) and to develop a mathematical model for the prediction of these properties. The binder was the Portland cement and fly ash (FA). Barite aggregate was used to achieve the heavy-weight concrete (HWC). A polycarboxylate based super plasticizer was used to increase workability and reach self-compacting feature. To research the fresh and hardened properties SCHWC many concrete mixes were prepared accordingly with “water-cement ratios”, “total aggregate-cement ratios”, and “fly ash-cement ratios”. These samples were tested to get the slump-flow, V-funnel, 7 and 28-day compressive strength values. The Response Surface Methodology (RSM) was used to develop regression equations using these experimental results. It is observed that the estimated values obtained with RSM are compatible with those obtained by the experimental method for the fresh and hardened properties of SCHWC.
{"title":"Prediction of Fresh and Hardened Properties of Self-Compacting Heavy-Weight Concrete Using Response Surface","authors":"Sibel Sağlıyan, E. Yalçın, K. E. Alyamaç, C. Polat","doi":"10.2478/jaes-2022-0012","DOIUrl":"https://doi.org/10.2478/jaes-2022-0012","url":null,"abstract":"Abstract The aim of this study is to investigate the fresh and hardened properties of the self-compacting heavy-weight concrete (SCHWC) and to develop a mathematical model for the prediction of these properties. The binder was the Portland cement and fly ash (FA). Barite aggregate was used to achieve the heavy-weight concrete (HWC). A polycarboxylate based super plasticizer was used to increase workability and reach self-compacting feature. To research the fresh and hardened properties SCHWC many concrete mixes were prepared accordingly with “water-cement ratios”, “total aggregate-cement ratios”, and “fly ash-cement ratios”. These samples were tested to get the slump-flow, V-funnel, 7 and 28-day compressive strength values. The Response Surface Methodology (RSM) was used to develop regression equations using these experimental results. It is observed that the estimated values obtained with RSM are compatible with those obtained by the experimental method for the fresh and hardened properties of SCHWC.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"12 1","pages":"77 - 86"},"PeriodicalIF":1.1,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47401028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract For the safe and economical design of a foundation under any civil engineering structure, precise estimation of the ultimate bearing capacity (UCB) of soil beneath the foundation is of significant concern. Numerous researchers have contributed to these field and proposed theories and equations to predict the subsoil’s ultimate bearing capacity. But determining the approximate value of bearing capacity depends on soil type and its characteristics, groundwater table, types of loads, loaded area of footing, depth of footing, etc. Moreover, deciding the appropriate depth and size of footing is a crucial task. This paper aims to propose a simplified numerical approach to predict the bearing capacity of soil beneath the foundation (NABBSF) using MATLAB software. Considering shear failure and excessive settlement criteria, this model will predict the ultimate, safe, and allowable soil bearing capacity beneath an isolated footing at different depths. The validity and accuracy of the proposed model is verified by comparing it with real field data.
{"title":"A Simplified Numerical Approach to Predict Bearing Capacity of Soil for Shallow Foundation","authors":"J. Das, B. Bharali","doi":"10.2478/jaes-2022-0005","DOIUrl":"https://doi.org/10.2478/jaes-2022-0005","url":null,"abstract":"Abstract For the safe and economical design of a foundation under any civil engineering structure, precise estimation of the ultimate bearing capacity (UCB) of soil beneath the foundation is of significant concern. Numerous researchers have contributed to these field and proposed theories and equations to predict the subsoil’s ultimate bearing capacity. But determining the approximate value of bearing capacity depends on soil type and its characteristics, groundwater table, types of loads, loaded area of footing, depth of footing, etc. Moreover, deciding the appropriate depth and size of footing is a crucial task. This paper aims to propose a simplified numerical approach to predict the bearing capacity of soil beneath the foundation (NABBSF) using MATLAB software. Considering shear failure and excessive settlement criteria, this model will predict the ultimate, safe, and allowable soil bearing capacity beneath an isolated footing at different depths. The validity and accuracy of the proposed model is verified by comparing it with real field data.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"12 1","pages":"33 - 36"},"PeriodicalIF":1.1,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45258801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The single pile is a structural element that has an important role in supporting any part of the superstructure. This paper adopted three dimensional finite element modelling by using ANSYS to discover the influence of soil size domain on pile diameter, pile length, load eccentricity and torsion magnitude. One type of soil was used and described by Drucker-Prager model. The numerical analysis has been performed to show how the variation in soil size domain effects on the behaviour of single pile under torsion load. The procedure which is adopted in the investigation depends on fixing all variables and changing one variable to show the impact of this variable on the pile response considering soil domain variation. From the investigation, it is obvious that the pile diameter, eccentricity and torsion load have a major influence on the pile response, while the pile length has a minor influence on the pile response. Here, the increase in pile diameter reduces the load transfer to the soil; also the increase in eccentricity increases the load transfer to the soil while the increase in soil domain reduces the pile response. When the torsion load increases the pile response increases too. The pile response refers to displacement, rotation, shear force and bending moment.
{"title":"Investigating the Response of Single Pile Under Pure Torsion","authors":"A. Hasan, Rafi M. Qasim","doi":"10.2478/jaes-2022-0006","DOIUrl":"https://doi.org/10.2478/jaes-2022-0006","url":null,"abstract":"Abstract The single pile is a structural element that has an important role in supporting any part of the superstructure. This paper adopted three dimensional finite element modelling by using ANSYS to discover the influence of soil size domain on pile diameter, pile length, load eccentricity and torsion magnitude. One type of soil was used and described by Drucker-Prager model. The numerical analysis has been performed to show how the variation in soil size domain effects on the behaviour of single pile under torsion load. The procedure which is adopted in the investigation depends on fixing all variables and changing one variable to show the impact of this variable on the pile response considering soil domain variation. From the investigation, it is obvious that the pile diameter, eccentricity and torsion load have a major influence on the pile response, while the pile length has a minor influence on the pile response. Here, the increase in pile diameter reduces the load transfer to the soil; also the increase in eccentricity increases the load transfer to the soil while the increase in soil domain reduces the pile response. When the torsion load increases the pile response increases too. The pile response refers to displacement, rotation, shear force and bending moment.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"12 1","pages":"37 - 42"},"PeriodicalIF":1.1,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47849531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Pagounis, N. Merlemis, D. Anastasiou, O. Arabatzi, V. Zacharis, M. Tsakiri
Abstract An optimized compact-based method is introduced that verifies the distance measuring precision of surveying instruments. The paper describes the improvement of the compact based method not only in establishing a compact facility by using shorter lengths and folded path but also in the assessment process by implementing the official ISO standard for electronic distance measuring equipment (ISO 17123-4). The method produces statistically comparable results to ISO standards and is suited for regular instrument checks in institutions with limited space available.
{"title":"Compact Testing of Total Station Instruments Using Folded Optics","authors":"V. Pagounis, N. Merlemis, D. Anastasiou, O. Arabatzi, V. Zacharis, M. Tsakiri","doi":"10.2478/jaes-2022-0011","DOIUrl":"https://doi.org/10.2478/jaes-2022-0011","url":null,"abstract":"Abstract An optimized compact-based method is introduced that verifies the distance measuring precision of surveying instruments. The paper describes the improvement of the compact based method not only in establishing a compact facility by using shorter lengths and folded path but also in the assessment process by implementing the official ISO standard for electronic distance measuring equipment (ISO 17123-4). The method produces statistically comparable results to ISO standards and is suited for regular instrument checks in institutions with limited space available.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"12 1","pages":"71 - 76"},"PeriodicalIF":1.1,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44297509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The BLUE line of Delhi Metro (DM) has been examined to identify the post COVID-19 access–egress attributes of users. An on-board survey of metro commuters is conducted in February and March 2021. The respondents reported six different modes for access and egress trips to nearest metro stations with 38.7% and 43% users opting for walking for access-egress trip respectively. The E-rickshaw is observed to be most preferred para-transit mode whereas private vehicle has small mode share for access-egress trip. It is revealed that 46.5% of respondents are captive riders whereas 51% owns at least one motorized private vehicle. The average access and egress distance covered by walking is (0.81+ 0.32/0.35) Km respectively. The average access and egress trip time by walking is (11.19+3.73) and (11.07+4.45) minutes respectively. The average access and egress trip time by E-rickshaw is (13.21+4.09) and (12.56+2.95) minutes respectively. The access and egress trip time by motorized modes are in the range of (12.36-14.39) and (10.41-13.56) minutes respectively. The average main haul distance across all access-egress modes is observed to be (19.69+11.19) Km. To understand the factors influencing the access–egress mode choice multinomial logistic (MNL) regression models are proposed. The access-egress time and distance are observed to be significant factors in access-egress mode choice. Less parking facility offered by DM is significant factor in access mode choice. Occasional commuters are only significant factor in context with frequency of travelling in DM.
{"title":"Post COVID-19 Access-Egress Attributes for Urban Metro Transit Users in Delhi","authors":"Salman Khursheed, F. A. Kidwai","doi":"10.2478/jaes-2022-0009","DOIUrl":"https://doi.org/10.2478/jaes-2022-0009","url":null,"abstract":"Abstract The BLUE line of Delhi Metro (DM) has been examined to identify the post COVID-19 access–egress attributes of users. An on-board survey of metro commuters is conducted in February and March 2021. The respondents reported six different modes for access and egress trips to nearest metro stations with 38.7% and 43% users opting for walking for access-egress trip respectively. The E-rickshaw is observed to be most preferred para-transit mode whereas private vehicle has small mode share for access-egress trip. It is revealed that 46.5% of respondents are captive riders whereas 51% owns at least one motorized private vehicle. The average access and egress distance covered by walking is (0.81+ 0.32/0.35) Km respectively. The average access and egress trip time by walking is (11.19+3.73) and (11.07+4.45) minutes respectively. The average access and egress trip time by E-rickshaw is (13.21+4.09) and (12.56+2.95) minutes respectively. The access and egress trip time by motorized modes are in the range of (12.36-14.39) and (10.41-13.56) minutes respectively. The average main haul distance across all access-egress modes is observed to be (19.69+11.19) Km. To understand the factors influencing the access–egress mode choice multinomial logistic (MNL) regression models are proposed. The access-egress time and distance are observed to be significant factors in access-egress mode choice. Less parking facility offered by DM is significant factor in access mode choice. Occasional commuters are only significant factor in context with frequency of travelling in DM.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"12 1","pages":"53 - 60"},"PeriodicalIF":1.1,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44278696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract In recent years, Building Information Modelling (BIM) is much popularized as construction design approach. It is very useful in providing the necessary information for any project before it is built. BIM implementation has demonstrated several merits; however practitioners have also reported some demerits and barriers which restrict the adoption of BIM in the construction industry. This study assessed the merits, demerits and barrier to implementation of BIM in the construction industry of Pakistan. Data collected form 42 practitioners involved in handling construction BIM based construction projects was analyzed statistically with average index method. The results showed that significant merits of the BIM as perceived by the practitioners are BIM helps in improving quality of Work; BIM is useful in controlling time and cost of the project; and helps in achieving client satisfaction. At the same time, the respondents mentioned BIM adds work for the designer and Interoperability as the significant demerits. Assessment regarding the barriers to BIM showed that top 3 common barriers are: lack of competent staff to operate the software; unawareness of the technology; and not ready to distort normal operational structure. These findings will help the practitioner to take necessary measurement for enhancing the implementation of BIM in the construction industry.
{"title":"Building Information Modeling in Construction Industry of Pakistan: Merits, Demerits and Barriers","authors":"M. Hussain, A. Memon, A. Bachayo","doi":"10.2478/jaes-2022-0007","DOIUrl":"https://doi.org/10.2478/jaes-2022-0007","url":null,"abstract":"Abstract In recent years, Building Information Modelling (BIM) is much popularized as construction design approach. It is very useful in providing the necessary information for any project before it is built. BIM implementation has demonstrated several merits; however practitioners have also reported some demerits and barriers which restrict the adoption of BIM in the construction industry. This study assessed the merits, demerits and barrier to implementation of BIM in the construction industry of Pakistan. Data collected form 42 practitioners involved in handling construction BIM based construction projects was analyzed statistically with average index method. The results showed that significant merits of the BIM as perceived by the practitioners are BIM helps in improving quality of Work; BIM is useful in controlling time and cost of the project; and helps in achieving client satisfaction. At the same time, the respondents mentioned BIM adds work for the designer and Interoperability as the significant demerits. Assessment regarding the barriers to BIM showed that top 3 common barriers are: lack of competent staff to operate the software; unawareness of the technology; and not ready to distort normal operational structure. These findings will help the practitioner to take necessary measurement for enhancing the implementation of BIM in the construction industry.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":"12 1","pages":"43 - 46"},"PeriodicalIF":1.1,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45287766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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