Pub Date : 2023-07-31DOI: 10.15866/irece.v14i4.22521
Thaer Jasim Mohammed, Khalid Mohammed Breesem, Abeer F. Hussein
In general, producing environmentally friendly concrete is necessary to conserve concrete material resources and reduce construction costs. Recycled tire rubber has been used to produce concrete in various construction works. In the beginning, rubber concrete mixes are done with different percentages of 0%, 6%, 12% and 24% of rubber tires. Then the slump test and the density of the concrete have been tested, in addition to the compressive strength and tensile strength. The strengthening of rubberized concrete slabs with fibre-reinforced polymer sheets is experimentally investigated to increase strength and durability. Thus, in this paper, twelve rubber concrete slabs have been strengthened by FPR sheets with different methods as external reinforcement in order to improve the fracture and shear strength. It is found out that the strengthening rubbered concrete slabs with inclined angles are unnoticeable higher than the straight strengthening configuration. In addition, the type of failure of rubberized concrete panels is affected by the configuration of external reinforcement.
{"title":"Enhanced Performance of Fracture Strength of Rubberized Concrete Panels by External Reinforcement","authors":"Thaer Jasim Mohammed, Khalid Mohammed Breesem, Abeer F. Hussein","doi":"10.15866/irece.v14i4.22521","DOIUrl":"https://doi.org/10.15866/irece.v14i4.22521","url":null,"abstract":"In general, producing environmentally friendly concrete is necessary to conserve concrete material resources and reduce construction costs. Recycled tire rubber has been used to produce concrete in various construction works. In the beginning, rubber concrete mixes are done with different percentages of 0%, 6%, 12% and 24% of rubber tires. Then the slump test and the density of the concrete have been tested, in addition to the compressive strength and tensile strength. The strengthening of rubberized concrete slabs with fibre-reinforced polymer sheets is experimentally investigated to increase strength and durability. Thus, in this paper, twelve rubber concrete slabs have been strengthened by FPR sheets with different methods as external reinforcement in order to improve the fracture and shear strength. It is found out that the strengthening rubbered concrete slabs with inclined angles are unnoticeable higher than the straight strengthening configuration. In addition, the type of failure of rubberized concrete panels is affected by the configuration of external reinforcement.","PeriodicalId":37854,"journal":{"name":"International Review of Civil Engineering","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135314856","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}
Pub Date : 2023-07-31DOI: 10.15866/irece.v14i4.23337
Abdul Kareem Muhammad Al-Shammaa, Ghusoon Sadiq Al-Qaisee, Bashar Rasheed Al-Hamami
The aim of this study is to find a simple, fast, and economical method for designing RC cantilever beams instead of the traditional methods. Generally, the concrete beams have been designed as T-sections so that their flange has failed within the compression zone, which has embedded with reinforced concrete slab. The structural engineer can select the appropriate section for each span length, but the trial and error method may be used with more effort and time. The economic selection has been become more difficult for cantilever beams especially with a large span due to the significant deflections they have been exposed to. In order to solve this problem, a current theoretical study has been conducted on a number of locally common dropped and inverted T-sections for cantilever RC beams that reinforced with a different reinforcement ratios and their sustained and immediate deflections have been checked according to the ACI -19 provisions. By creating an algorithm and using the Python 3.4 software, the allowable sections have been identified for each required span length. Three curves have been drawn to choose the optimum dimensions for both dropped and inverted T-sections easily. In addition, by comparison, it has been found out that the selection of inverted T-sections has more economy to provide longer spans than dropped sections.
{"title":"Advantages of Using Inverted T-Sections to Construct Cantilever RC Beams","authors":"Abdul Kareem Muhammad Al-Shammaa, Ghusoon Sadiq Al-Qaisee, Bashar Rasheed Al-Hamami","doi":"10.15866/irece.v14i4.23337","DOIUrl":"https://doi.org/10.15866/irece.v14i4.23337","url":null,"abstract":"The aim of this study is to find a simple, fast, and economical method for designing RC cantilever beams instead of the traditional methods. Generally, the concrete beams have been designed as T-sections so that their flange has failed within the compression zone, which has embedded with reinforced concrete slab. The structural engineer can select the appropriate section for each span length, but the trial and error method may be used with more effort and time. The economic selection has been become more difficult for cantilever beams especially with a large span due to the significant deflections they have been exposed to. In order to solve this problem, a current theoretical study has been conducted on a number of locally common dropped and inverted T-sections for cantilever RC beams that reinforced with a different reinforcement ratios and their sustained and immediate deflections have been checked according to the ACI -19 provisions. By creating an algorithm and using the Python 3.4 software, the allowable sections have been identified for each required span length. Three curves have been drawn to choose the optimum dimensions for both dropped and inverted T-sections easily. In addition, by comparison, it has been found out that the selection of inverted T-sections has more economy to provide longer spans than dropped sections.","PeriodicalId":37854,"journal":{"name":"International Review of Civil Engineering","volume":"238 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135314924","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}
Pub Date : 2023-07-31DOI: 10.15866/irece.v14i4.22143
Faroq Maraqa, Jamal Al Adwan, Yazan Alzubi, Bilal Yasin, Ahmed Khatatbeh
Over the last few decades, intensive investigations on the artificial neural network capabilities for addressing structural engineering problems have been concluded in the literature. Multiple models for predicting the load-bearing capacity and failure mode have been developed in this regard. However, most of the studies on the capabilities of artificial neural networks for estimating the ultimate moment capacity were focused on the feedforward backpropagation approach. As a result, this research aims to investigate the performance of using different artificial neural network approaches to forecast the ultimate moment capacity of spiral RC columns. As a part of the study, the performance of feedforward backpropagation, cascade-forward neural networks, and generalized regression neural networks will be compared and evaluated against experimental and traditional results. The findings demonstrated that artificial neural networks provide a reliable method for forecasting the spiral RC columns' moment capacity, and they can outweigh code-based empirical formulation.
{"title":"Estimating Ultimate Moment Capacity of Spirally Reinforced Concrete Columns Using Various Artificial Neural Networks","authors":"Faroq Maraqa, Jamal Al Adwan, Yazan Alzubi, Bilal Yasin, Ahmed Khatatbeh","doi":"10.15866/irece.v14i4.22143","DOIUrl":"https://doi.org/10.15866/irece.v14i4.22143","url":null,"abstract":"Over the last few decades, intensive investigations on the artificial neural network capabilities for addressing structural engineering problems have been concluded in the literature. Multiple models for predicting the load-bearing capacity and failure mode have been developed in this regard. However, most of the studies on the capabilities of artificial neural networks for estimating the ultimate moment capacity were focused on the feedforward backpropagation approach. As a result, this research aims to investigate the performance of using different artificial neural network approaches to forecast the ultimate moment capacity of spiral RC columns. As a part of the study, the performance of feedforward backpropagation, cascade-forward neural networks, and generalized regression neural networks will be compared and evaluated against experimental and traditional results. The findings demonstrated that artificial neural networks provide a reliable method for forecasting the spiral RC columns' moment capacity, and they can outweigh code-based empirical formulation.","PeriodicalId":37854,"journal":{"name":"International Review of Civil Engineering","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135315040","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}
Pub Date : 2023-07-31DOI: 10.15866/irece.v14i4.21039
Rafi Mohammed Qasim, Ihsan Abdulkareem Abdulhussein, Khalid Al-Asadi
Several experimental runs have been conducted in a rectangular flume in order to investigate the effect of composite hydraulic structures and emerged dikes on flow hydraulic characteristics. The composite hydraulic structures used in this study are composed of a rectangular weir and gate with a different dimensional model. The dikes' structure is simulated by wood sheets of 10 cm height with two lengths, 1.0 and 1.5 cm. Three dike arrangements have been adopted in this study and installed downstream of the composite hydraulic structure. These arrangements consist of one side, both sides, and zigzag arrangement. Each dike arrangement has three cases with different dike numbers and spacing values. All the experiments have satisfied the submerged flow condition. The investigation of the flow cross-sectional area that passes the gate and weir of the composite structure and the dike arrangements, numbers, and lengths have been observed to find their effects on downstream average water depth, actual discharge, discharge coefficient of the composite structure, upstream and downstream Froude numbers, and downstream Reynolds number. The main finding in this study is that the existence of dikes downstream of the composite structure causes an increase in the downstream water depth without any conflict or fluctuation in the workability of the composite hydraulic structure. This study shows reasonable and noticeable results for Froude number, flow velocity, head losses, and water surface profile with distance in the downstream region. The experimental work is supported by adopting the statistical test to inspect the suitability and the acceptability of the average downstream water depth. It is strongly stated that all the observed data follow the normal distribution.
{"title":"Experimental Simulation of Interaction Between Weir – Gate Hydraulic Structure and Dikes","authors":"Rafi Mohammed Qasim, Ihsan Abdulkareem Abdulhussein, Khalid Al-Asadi","doi":"10.15866/irece.v14i4.21039","DOIUrl":"https://doi.org/10.15866/irece.v14i4.21039","url":null,"abstract":"Several experimental runs have been conducted in a rectangular flume in order to investigate the effect of composite hydraulic structures and emerged dikes on flow hydraulic characteristics. The composite hydraulic structures used in this study are composed of a rectangular weir and gate with a different dimensional model. The dikes' structure is simulated by wood sheets of 10 cm height with two lengths, 1.0 and 1.5 cm. Three dike arrangements have been adopted in this study and installed downstream of the composite hydraulic structure. These arrangements consist of one side, both sides, and zigzag arrangement. Each dike arrangement has three cases with different dike numbers and spacing values. All the experiments have satisfied the submerged flow condition. The investigation of the flow cross-sectional area that passes the gate and weir of the composite structure and the dike arrangements, numbers, and lengths have been observed to find their effects on downstream average water depth, actual discharge, discharge coefficient of the composite structure, upstream and downstream Froude numbers, and downstream Reynolds number. The main finding in this study is that the existence of dikes downstream of the composite structure causes an increase in the downstream water depth without any conflict or fluctuation in the workability of the composite hydraulic structure. This study shows reasonable and noticeable results for Froude number, flow velocity, head losses, and water surface profile with distance in the downstream region. The experimental work is supported by adopting the statistical test to inspect the suitability and the acceptability of the average downstream water depth. It is strongly stated that all the observed data follow the normal distribution.","PeriodicalId":37854,"journal":{"name":"International Review of Civil Engineering","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135314853","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}
Pub Date : 2023-07-31DOI: 10.15866/irece.v14i4.21805
Malik Ismail Alamayreh, Ali Alahmer, Subhi M. Bazlamit, Mai Bani Younes
The exothermic hydration of cement generates heat, which increases the temperature in the core of the concrete members. This causes a temperature gradient, leading to thermal stresses, and sometimes cracks due to the expansion of the core and contraction of the surface, which reduces massive concrete durability. The goal of this study is to assess the impact of concrete precooling technologies on the quality of massive concrete constructions, such as dams constructed in desert climate. The impact on the strength of concrete and its hydration time under various operating circumstances have been investigated. In massive concrete structures, cooling can be accomplished by reducing the temperature of aggregates using ventilated cold air from an air conditioning system or by using chilled water. In order to determine the initial and the final settings of concrete, the Vicat test has been used. The use of chilled water in the preparation of mortar can increase the cement solidification time. According to experimental laboratory tests, concrete cubes prepared with chilled water have higher compressive strength than those prepared with cooled aggregates. The compressive strength of the concrete mixed with chilled water has increased by 35%, while a 10% increase in compressive strength in the concrete mix has been reached by using precooled aggregates. Results of compressive strength tests on mortar cubes prepared with chilled water have showed a 29% increase after 28 days of curing.
{"title":"Precooling Massive Concrete Mixes Using Cooled Aggregates or Chilled Water","authors":"Malik Ismail Alamayreh, Ali Alahmer, Subhi M. Bazlamit, Mai Bani Younes","doi":"10.15866/irece.v14i4.21805","DOIUrl":"https://doi.org/10.15866/irece.v14i4.21805","url":null,"abstract":"The exothermic hydration of cement generates heat, which increases the temperature in the core of the concrete members. This causes a temperature gradient, leading to thermal stresses, and sometimes cracks due to the expansion of the core and contraction of the surface, which reduces massive concrete durability. The goal of this study is to assess the impact of concrete precooling technologies on the quality of massive concrete constructions, such as dams constructed in desert climate. The impact on the strength of concrete and its hydration time under various operating circumstances have been investigated. In massive concrete structures, cooling can be accomplished by reducing the temperature of aggregates using ventilated cold air from an air conditioning system or by using chilled water. In order to determine the initial and the final settings of concrete, the Vicat test has been used. The use of chilled water in the preparation of mortar can increase the cement solidification time. According to experimental laboratory tests, concrete cubes prepared with chilled water have higher compressive strength than those prepared with cooled aggregates. The compressive strength of the concrete mixed with chilled water has increased by 35%, while a 10% increase in compressive strength in the concrete mix has been reached by using precooled aggregates. Results of compressive strength tests on mortar cubes prepared with chilled water have showed a 29% increase after 28 days of curing.","PeriodicalId":37854,"journal":{"name":"International Review of Civil Engineering","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135314854","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}
Pub Date : 2023-07-31DOI: 10.15866/irece.v14i4.21955
Amina Assouli, Bounoua Tab, Fodil Hammadi, Mohammad Mahdi Kheirikhah, Ahmed Tafraoui
Over the past decades, sandwich structures have shown impressive performances in impact resistance and damage tolerance, which has allowed their innovations in various disciplines to flourish. The birth of sewn sandwiches has given, on the one hand, elements with structural cores that participate in the resistance to transverse shearing and, on the other hand, sandwich skins that contribute to resisting forces from the same direction to achieve an assembly, giving the structure an optimal lightness. After evaluating the behavior of said structure against impact stresses, in this study, it is proposed to start by evaluating the effect of damage caused by impacts of different energies. Then, their influence on the structure's mechanical properties and its ability to undergo one or more new impacts will be checked. For this, by using a microscope, diagnostic tests have been carried out for each sample after the first impact, followed by characterization by non-destructive tests based on vibration analysis in order to examine and compare the properties of a healthy plaque with those of the affected plaques. The tests are carried out on samples of dimensions 150 × 200 × (1.5 + 20 + 1.5 = 23) mm3. The results obtained by using the specialized software PULSE have encouraged a second series of effects on these samples.
{"title":"Diagnostic Study of the Possibility of Damaged Sewn Sandwiches to Undergo a New Impact","authors":"Amina Assouli, Bounoua Tab, Fodil Hammadi, Mohammad Mahdi Kheirikhah, Ahmed Tafraoui","doi":"10.15866/irece.v14i4.21955","DOIUrl":"https://doi.org/10.15866/irece.v14i4.21955","url":null,"abstract":"Over the past decades, sandwich structures have shown impressive performances in impact resistance and damage tolerance, which has allowed their innovations in various disciplines to flourish. The birth of sewn sandwiches has given, on the one hand, elements with structural cores that participate in the resistance to transverse shearing and, on the other hand, sandwich skins that contribute to resisting forces from the same direction to achieve an assembly, giving the structure an optimal lightness. After evaluating the behavior of said structure against impact stresses, in this study, it is proposed to start by evaluating the effect of damage caused by impacts of different energies. Then, their influence on the structure's mechanical properties and its ability to undergo one or more new impacts will be checked. For this, by using a microscope, diagnostic tests have been carried out for each sample after the first impact, followed by characterization by non-destructive tests based on vibration analysis in order to examine and compare the properties of a healthy plaque with those of the affected plaques. The tests are carried out on samples of dimensions 150 × 200 × (1.5 + 20 + 1.5 = 23) mm3. The results obtained by using the specialized software PULSE have encouraged a second series of effects on these samples.","PeriodicalId":37854,"journal":{"name":"International Review of Civil Engineering","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135314855","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}
Pub Date : 2023-07-31DOI: 10.15866/irece.v14i4.22482
D. Christianto, Tavio Tavio, M. R. Irianto
The numerical evaluation of the shear strength of Steel-Fiber Reinforced Concrete (SFRC) beams without coarse aggregate using data from previous research has been performed in MIDAS FEA. The SFRC beams are modeled by using the total strain crack model with Thorenfeldt for compression behavior and brittle tension behavior. Modified bond stress-slip functions proposed by fib have been used to model the bond between concrete and reinforcement. From the finite element analysis, the cracking pattern and the maximum load at failure of SFRC beams without coarse aggregate have been similar to the test results. As the longitudinal reinforcement ratio increases above 3%, the finite element analysis starts to give overestimated maximum load. The highest ratio of maximum load from analysis and test results equal to 136% has been obtained from 7.82% reinforcement. It is also observed that the influence of longitudinal reinforcement ratio on the shear strength of SFRC without coarse aggregate is lower compared to normal-strength concrete predicted by ACI 318-19. Further studies on bond stress-slip relationship of SFRC without coarse aggregate are needed.
{"title":"Shear Strength of SFRC Beams Without Coarse Aggregate Using Finite Element Analysis with Bond-Slip","authors":"D. Christianto, Tavio Tavio, M. R. Irianto","doi":"10.15866/irece.v14i4.22482","DOIUrl":"https://doi.org/10.15866/irece.v14i4.22482","url":null,"abstract":"The numerical evaluation of the shear strength of Steel-Fiber Reinforced Concrete (SFRC) beams without coarse aggregate using data from previous research has been performed in MIDAS FEA. The SFRC beams are modeled by using the total strain crack model with Thorenfeldt for compression behavior and brittle tension behavior. Modified bond stress-slip functions proposed by fib have been used to model the bond between concrete and reinforcement. From the finite element analysis, the cracking pattern and the maximum load at failure of SFRC beams without coarse aggregate have been similar to the test results. As the longitudinal reinforcement ratio increases above 3%, the finite element analysis starts to give overestimated maximum load. The highest ratio of maximum load from analysis and test results equal to 136% has been obtained from 7.82% reinforcement. It is also observed that the influence of longitudinal reinforcement ratio on the shear strength of SFRC without coarse aggregate is lower compared to normal-strength concrete predicted by ACI 318-19. Further studies on bond stress-slip relationship of SFRC without coarse aggregate are needed.","PeriodicalId":37854,"journal":{"name":"International Review of Civil Engineering","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135314922","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}
Pub Date : 2023-07-31DOI: 10.15866/irece.v14i4.20968
Chitti Babu Kapuganti, K. V. G. D. Balaji, T. Santhosh Kumar, I. L. N. Prasad
Earned Value Management (EVM) is the conventional method for controlling and monitoring construction projects. Schedule monitoring with EVM has a lower impact since it measures in budgetary terms. Earned Duration Method (EDM) was presented, which decouples schedule and cost aspects. The parameters in EDM monitors the health of the project schedule and gives the estimated completion date. EDM results are indeterministic, so the estimators require expertise in order to comprehend them. For this purpose, the present study proposes a new methodology entitled "Grey Earned Duration Management (GEDM)" by associating EDM and grey theory. From GEDM, estimators can get a clear idea about the degree of control measures to consider based on the project progress at a particular point in time. GEDM can precisely forecast the upper bound and lower bound of the estimated duration at completion for every tracking point. GEDM significantly enhances the results of EDM by providing a range of the estimated parameter. This paper also presents a case study to distinguish the EDM and GEDM.
{"title":"Grey Earned Duration Management: a New Schedule Monitoring Approach","authors":"Chitti Babu Kapuganti, K. V. G. D. Balaji, T. Santhosh Kumar, I. L. N. Prasad","doi":"10.15866/irece.v14i4.20968","DOIUrl":"https://doi.org/10.15866/irece.v14i4.20968","url":null,"abstract":"Earned Value Management (EVM) is the conventional method for controlling and monitoring construction projects. Schedule monitoring with EVM has a lower impact since it measures in budgetary terms. Earned Duration Method (EDM) was presented, which decouples schedule and cost aspects. The parameters in EDM monitors the health of the project schedule and gives the estimated completion date. EDM results are indeterministic, so the estimators require expertise in order to comprehend them. For this purpose, the present study proposes a new methodology entitled \"Grey Earned Duration Management (GEDM)\" by associating EDM and grey theory. From GEDM, estimators can get a clear idea about the degree of control measures to consider based on the project progress at a particular point in time. GEDM can precisely forecast the upper bound and lower bound of the estimated duration at completion for every tracking point. GEDM significantly enhances the results of EDM by providing a range of the estimated parameter. This paper also presents a case study to distinguish the EDM and GEDM.","PeriodicalId":37854,"journal":{"name":"International Review of Civil Engineering","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135314920","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}
Pub Date : 2023-07-31DOI: 10.15866/irece.v14i4.23079
Indra Tjahjani, Herawati Zetha Rahman, Perdana Miraj
Transit Oriented Development (TOD) has been used in the past decades to cope with urban planning and transportation issues. Despite its successful of adoption to improve land use development, transit demand, economic growth and job opportunities, there is little evidence of practical implementation that takes into account the principle of TOD including density, diversity, and design. This research uses stations located in Java Island in Indonesia as a case study. A combination of Multi-Criteria Decision Making (MCDM) of AHP and TOPSIS has been used to generate potential station for TOD development. The methodology suggests parameters that should be prioritized when designing TOD. It consists of intermodal transport, land use allocation, and commercial and retail density. Out of 389 stations across five provinces under investigation, the findings of this research have found seven stations that are suitable for urban TOD, and 14 stations that can be established as suburban TOD.
{"title":"Decision Making for the Location of Transit Oriented Development: a Case Study in Developing Country","authors":"Indra Tjahjani, Herawati Zetha Rahman, Perdana Miraj","doi":"10.15866/irece.v14i4.23079","DOIUrl":"https://doi.org/10.15866/irece.v14i4.23079","url":null,"abstract":"Transit Oriented Development (TOD) has been used in the past decades to cope with urban planning and transportation issues. Despite its successful of adoption to improve land use development, transit demand, economic growth and job opportunities, there is little evidence of practical implementation that takes into account the principle of TOD including density, diversity, and design. This research uses stations located in Java Island in Indonesia as a case study. A combination of Multi-Criteria Decision Making (MCDM) of AHP and TOPSIS has been used to generate potential station for TOD development. The methodology suggests parameters that should be prioritized when designing TOD. It consists of intermodal transport, land use allocation, and commercial and retail density. Out of 389 stations across five provinces under investigation, the findings of this research have found seven stations that are suitable for urban TOD, and 14 stations that can be established as suburban TOD.","PeriodicalId":37854,"journal":{"name":"International Review of Civil Engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135315041","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}
Pub Date : 2023-07-31DOI: 10.15866/irece.v14i4.22554
Cesar A. Morales
A solution to the large base displacement problem in isolated buildings under seismic load is sought. This is based on the notion of relative transmissibility of mechanical vibrations. A second and important novelty is the application of a new spectral characterization, as narrow band, of ground displacement. In situations where the large isolator displacement is a concern, the proposal can work as a base-isolation design procedure. A standard isolated structural model is employed to demonstrate that the base displacement level can be reduced to well under the ground displacement one, which results in a positive comparison with previous passive and active control solutions; in fact, the design aim is a competitive ½ ratio for both displacements. Nevertheless, it is also demonstrated that these good reduction levels are possible at the expense of a large damping ratio.
{"title":"Relative Transmissibility to Control Isolator Displacement Under Earthquakes","authors":"Cesar A. Morales","doi":"10.15866/irece.v14i4.22554","DOIUrl":"https://doi.org/10.15866/irece.v14i4.22554","url":null,"abstract":"A solution to the large base displacement problem in isolated buildings under seismic load is sought. This is based on the notion of relative transmissibility of mechanical vibrations. A second and important novelty is the application of a new spectral characterization, as narrow band, of ground displacement. In situations where the large isolator displacement is a concern, the proposal can work as a base-isolation design procedure. A standard isolated structural model is employed to demonstrate that the base displacement level can be reduced to well under the ground displacement one, which results in a positive comparison with previous passive and active control solutions; in fact, the design aim is a competitive ½ ratio for both displacements. Nevertheless, it is also demonstrated that these good reduction levels are possible at the expense of a large damping ratio.","PeriodicalId":37854,"journal":{"name":"International Review of Civil Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135315042","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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