Pub Date : 2023-10-21DOI: 10.1007/s41062-023-01251-1
Bindesh Nunia, J. Prashanth, S. Choudhury
{"title":"Development of impact factor expression for the design and performance evaluation of long-span-balanced cantilever-type prestressed box girder bridges","authors":"Bindesh Nunia, J. Prashanth, S. Choudhury","doi":"10.1007/s41062-023-01251-1","DOIUrl":"https://doi.org/10.1007/s41062-023-01251-1","url":null,"abstract":"","PeriodicalId":13525,"journal":{"name":"Innovative Infrastructure Solutions","volume":"69 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135511704","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 : 2023-10-18DOI: 10.1007/s41062-023-01267-7
Alaa ElMarkaby, Abdelmonem Sanad, Ahmed Elyamany, Ebtisam Yehia
Abstract When selecting the appropriate bridge deck construction system, it is essential to consider many criteria such as the span length, geographical location, construction speed, cost, site conditions, resource availability, technology, ease of construction, and service life. The objective of this study is to optimize the decision-making process for selecting a bridge deck construction system in the preliminary design and planning stage. The proposed model allows designers or decision-makers to make an informed choice of an appropriate construction system according to project criteria through a decision support system. The model employs value engineering methodology and a multi-criteria decision-making method and utilizes the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS), a multi-criteria decision-making method. To gather modeling data from a focus group consisting of professional bridge engineers, a semi-structured interview and two questionnaires are conducted. When applying the proposed model to two active bridge construction projects in Egypt, it reveals that "Span by Span using launching girder" and "precast post tension girder" are better suited to cases one and two, respectively. The study makes a contribution by presenting a decision support system that combines value engineering methodology and a multi-criteria decision-making method (TOPSIS). This system empowers designers and decision-makers to make project decisions considering specific criteria and constraints.
摘要在选择合适的桥面施工体系时，必须考虑跨径长度、地理位置、施工速度、成本、场地条件、资源可用性、技术、施工难易程度、使用寿命等诸多标准。本研究的目的是优化在初步设计和规划阶段选择桥面施工体系的决策过程。建议的模型允许设计师或决策者通过决策支持系统根据项目标准做出适当的建筑系统的明智选择。该模型采用价值工程方法和多准则决策方法，并利用多准则决策方法TOPSIS (technical for Preference Order by Similarity to Ideal Solution)。为了收集由专业桥梁工程师组成的焦点小组的建模数据，进行了半结构化访谈和两次问卷调查。将本文提出的模型应用于埃及两座现役桥梁建设项目，结果表明，“跨跨推梁”和“预制后张梁”分别适用于第一种和第二种情况。本研究提出了一种将价值工程方法与多准则决策方法(TOPSIS)相结合的决策支持系统。该系统使设计师和决策者能够根据特定的标准和约束条件做出项目决策。
{"title":"Multi-criteria decision support system for bridge construction system selection utilizing value engineering and TOPSIS","authors":"Alaa ElMarkaby, Abdelmonem Sanad, Ahmed Elyamany, Ebtisam Yehia","doi":"10.1007/s41062-023-01267-7","DOIUrl":"https://doi.org/10.1007/s41062-023-01267-7","url":null,"abstract":"Abstract When selecting the appropriate bridge deck construction system, it is essential to consider many criteria such as the span length, geographical location, construction speed, cost, site conditions, resource availability, technology, ease of construction, and service life. The objective of this study is to optimize the decision-making process for selecting a bridge deck construction system in the preliminary design and planning stage. The proposed model allows designers or decision-makers to make an informed choice of an appropriate construction system according to project criteria through a decision support system. The model employs value engineering methodology and a multi-criteria decision-making method and utilizes the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS), a multi-criteria decision-making method. To gather modeling data from a focus group consisting of professional bridge engineers, a semi-structured interview and two questionnaires are conducted. When applying the proposed model to two active bridge construction projects in Egypt, it reveals that \"Span by Span using launching girder\" and \"precast post tension girder\" are better suited to cases one and two, respectively. The study makes a contribution by presenting a decision support system that combines value engineering methodology and a multi-criteria decision-making method (TOPSIS). This system empowers designers and decision-makers to make project decisions considering specific criteria and constraints.","PeriodicalId":13525,"journal":{"name":"Innovative Infrastructure Solutions","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135823371","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 : 2023-10-17DOI: 10.1007/s41062-023-01256-w
Kawan M. Abdulrahman, Viktor Gonda, Mihály Réger
Abstract Differential scanning calorimetry (DSC) is used to identify the thermal histories of samples to analyse and diagnose production and quality concerns connected to industrial rheocasting semi-solid alloy, that had undergone different tempers of aluminium alloy EN AB-42000 alloy. In this study, the solidus temperatures of several alloy samples are investigated using thermodynamic calculations and DSC observations in this work. The balance of important characteristics, including pseudo-eutectic, thermal sensitivity, heat flow, and enthalpies behaviour, of Al alloys has been investigated using experimental data from DSC and solid fractions. In addition, the choice of heating rates is critical as high rates can blur the two peaks in the mushy zone, while low rates lead to slower measurements. Using smaller sample weights and slower rates is preferable to obtain more accurate results. Analysing the shape of the fs curve, exact composition, and a reference composition without contaminants is essential for understanding complex behaviours, including pseudo-eutectic phenomena. The thermal sensitivity of compositions also plays a crucial role in the analysis. Despite heat flow decreasing with decreased sample weight, the measurement limit can still be exceeded at high heating or cooling rates (20 °C/min) during the eutectic reaction. The eutectic reaction exhibits higher peaks with enthalpies ranging from 360 to 430 mJ/g. However, drawing conclusions regarding trends in heating versus cooling or comparing low-mass and higher-mass samples can be challenging. The non-equilibrium transformation of the eutectic occurs within a more confined temperature range. Increasing rates lead to overlapping reactions, resulting in complex thermal behaviour.
{"title":"Differential scanning calorimetry of aluminium EN AB-42000 alloy rheocasting semi-solid in different stage heating rates","authors":"Kawan M. Abdulrahman, Viktor Gonda, Mihály Réger","doi":"10.1007/s41062-023-01256-w","DOIUrl":"https://doi.org/10.1007/s41062-023-01256-w","url":null,"abstract":"Abstract Differential scanning calorimetry (DSC) is used to identify the thermal histories of samples to analyse and diagnose production and quality concerns connected to industrial rheocasting semi-solid alloy, that had undergone different tempers of aluminium alloy EN AB-42000 alloy. In this study, the solidus temperatures of several alloy samples are investigated using thermodynamic calculations and DSC observations in this work. The balance of important characteristics, including pseudo-eutectic, thermal sensitivity, heat flow, and enthalpies behaviour, of Al alloys has been investigated using experimental data from DSC and solid fractions. In addition, the choice of heating rates is critical as high rates can blur the two peaks in the mushy zone, while low rates lead to slower measurements. Using smaller sample weights and slower rates is preferable to obtain more accurate results. Analysing the shape of the fs curve, exact composition, and a reference composition without contaminants is essential for understanding complex behaviours, including pseudo-eutectic phenomena. The thermal sensitivity of compositions also plays a crucial role in the analysis. Despite heat flow decreasing with decreased sample weight, the measurement limit can still be exceeded at high heating or cooling rates (20 °C/min) during the eutectic reaction. The eutectic reaction exhibits higher peaks with enthalpies ranging from 360 to 430 mJ/g. However, drawing conclusions regarding trends in heating versus cooling or comparing low-mass and higher-mass samples can be challenging. The non-equilibrium transformation of the eutectic occurs within a more confined temperature range. Increasing rates lead to overlapping reactions, resulting in complex thermal behaviour.","PeriodicalId":13525,"journal":{"name":"Innovative Infrastructure Solutions","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136033514","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 : 2023-10-17DOI: 10.1007/s41062-023-01265-9
Prabhakar Kumar, Shiv Shankar Kumar
{"title":"Development of synthetic acceleration time histories for seismic ground response studies for site classes C to E for Bihar region: a case study","authors":"Prabhakar Kumar, Shiv Shankar Kumar","doi":"10.1007/s41062-023-01265-9","DOIUrl":"https://doi.org/10.1007/s41062-023-01265-9","url":null,"abstract":"","PeriodicalId":13525,"journal":{"name":"Innovative Infrastructure Solutions","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135994875","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 : 2023-10-15DOI: 10.1007/s41062-023-01263-x
Swati Patil, Mahesh Endait
{"title":"Experimental investigation of biochemical and geotechnical properties of municipal solid waste undergoing biodegradation for landfill design","authors":"Swati Patil, Mahesh Endait","doi":"10.1007/s41062-023-01263-x","DOIUrl":"https://doi.org/10.1007/s41062-023-01263-x","url":null,"abstract":"","PeriodicalId":13525,"journal":{"name":"Innovative Infrastructure Solutions","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136184991","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 : 2023-10-13DOI: 10.1007/s41062-023-01245-z
F. A. Megahed, M. H. Seleem, A. A. M. Badawy, I. A. Sharaky
Abstract Reinforced concrete (RC) beams strengthened in flexure using externally bonded (EB) or near-surface mounted (NSM) fiber-Reinforced Polymers (FRP) and metals have gained considerable interest over the last few decades. As few of the previous review papers concerned with NSM elements or both EB and NSM methods so this paper aimed to review the previous research that handled the behavior of RC beams strengthened by NSM and EB techniques, compared their advantages and disadvantages and reported the future recommendations. Moreover, the review focused on the effect of strengthening materials (metallic and FRP materials), strengthening method, strengthening elements characteristics (shape and area), and any other factors affecting the performance of the strengthened RC beams in each technique. The review demonstrated that the strengthening element’s failure mode significantly affects the RC beams’ load-carrying capacity strengthened by EB or NSM. Moreover, the type of FRP materials and the end anchorage significantly affect the load efficiency of the strengthened RC beams depending on the type of failure mode.
{"title":"The flexural response of RC beams strengthened by EB/NSM techniques using FRP and metal materials: a state-of-the-art review","authors":"F. A. Megahed, M. H. Seleem, A. A. M. Badawy, I. A. Sharaky","doi":"10.1007/s41062-023-01245-z","DOIUrl":"https://doi.org/10.1007/s41062-023-01245-z","url":null,"abstract":"Abstract Reinforced concrete (RC) beams strengthened in flexure using externally bonded (EB) or near-surface mounted (NSM) fiber-Reinforced Polymers (FRP) and metals have gained considerable interest over the last few decades. As few of the previous review papers concerned with NSM elements or both EB and NSM methods so this paper aimed to review the previous research that handled the behavior of RC beams strengthened by NSM and EB techniques, compared their advantages and disadvantages and reported the future recommendations. Moreover, the review focused on the effect of strengthening materials (metallic and FRP materials), strengthening method, strengthening elements characteristics (shape and area), and any other factors affecting the performance of the strengthened RC beams in each technique. The review demonstrated that the strengthening element’s failure mode significantly affects the RC beams’ load-carrying capacity strengthened by EB or NSM. Moreover, the type of FRP materials and the end anchorage significantly affect the load efficiency of the strengthened RC beams depending on the type of failure mode.","PeriodicalId":13525,"journal":{"name":"Innovative Infrastructure Solutions","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135853244","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 : 2023-10-11DOI: 10.1007/s41062-023-01233-3
Emad Abdelbasset, Abbas Hassan, Nabil H. Amer, Yasser A. Khalifa
Abstract Scheduling repetitive construction projects poses a significant challenge in optimally utilizing multiple concurrent crews and sequencing their work to minimize project duration and cost. To address this challenge, this study presents the development of a multi-objective scheduling optimization model for repetitive construction projects consisting of three modules. First, a scheduling module ensures the harmonious coordination of multiple concurrent crews for each activity while considering varying productivity rates, work continuity constraints, and project precedence relationships. Second, a cost module incorporates various contractual cost components to enable a thorough evaluation of project costs and provides flexibility to contractors encountering different contract terms. Third, an optimization module utilizes a genetic algorithm to identify optimal combinations of crews working in parallel and their optimal work sequence, to simultaneously minimize project duration and cost. An application example from the literature was analyzed to validate the model and demonstrate its superiority over previous models. The results showed significant reductions of 8% and 0.78% in project duration and overall costs, respectively, compared to previous models. Furthermore, the capabilities of the model were demonstrated through a real-life case study involving a highway development and renovation project, highlighting its practical benefits and effectiveness in a real-world construction scenario.
{"title":"Optimizing the number of crews working in parallel and their work sequence to minimize project duration and cost for repetitive construction projects","authors":"Emad Abdelbasset, Abbas Hassan, Nabil H. Amer, Yasser A. Khalifa","doi":"10.1007/s41062-023-01233-3","DOIUrl":"https://doi.org/10.1007/s41062-023-01233-3","url":null,"abstract":"Abstract Scheduling repetitive construction projects poses a significant challenge in optimally utilizing multiple concurrent crews and sequencing their work to minimize project duration and cost. To address this challenge, this study presents the development of a multi-objective scheduling optimization model for repetitive construction projects consisting of three modules. First, a scheduling module ensures the harmonious coordination of multiple concurrent crews for each activity while considering varying productivity rates, work continuity constraints, and project precedence relationships. Second, a cost module incorporates various contractual cost components to enable a thorough evaluation of project costs and provides flexibility to contractors encountering different contract terms. Third, an optimization module utilizes a genetic algorithm to identify optimal combinations of crews working in parallel and their optimal work sequence, to simultaneously minimize project duration and cost. An application example from the literature was analyzed to validate the model and demonstrate its superiority over previous models. The results showed significant reductions of 8% and 0.78% in project duration and overall costs, respectively, compared to previous models. Furthermore, the capabilities of the model were demonstrated through a real-life case study involving a highway development and renovation project, highlighting its practical benefits and effectiveness in a real-world construction scenario.","PeriodicalId":13525,"journal":{"name":"Innovative Infrastructure Solutions","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136098680","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 : 2023-10-11DOI: 10.1007/s41062-023-01253-z
Sameh Yehia, Arafa M. Ibrahim, Doaa F. Ahmed
Abstract The naturally occurring wastes contain a large number of active groups. In this study, shrimp shell wastes were modified chemically to form chitosan. When mixing concrete with a natural polymer the result revealed a synergistic impact on the characteristics and functionality of the concrete structure. The formed chitosan was characterized by Fourier-Transform Infrared Spectroscopy (FT-IR), Thermogravimetric Analysis (TGA), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). Five concrete mixes were designed to achieve the study objective. For certain concrete mixes, admixtures such as a natural polymer (chitosan), and chemical (superplasticizer) were added with 0.05% by weight of the cement content. Those admixtures were added to study their behavior on the characteristics of the concrete mixes, and then compare test results with control concrete mixes. Also, the purpose of the experiment was expanded to study the impact of adding the admixtures to fibrous concrete, as this fibrous concrete faces interlocking due to steel fiber's presence in the fresh concrete mixture. The results indicated that concrete-embedded chitosan exhibited significant enhancement in the mechanical properties. Further, the surface shape of concrete was characterized by the presence of chitosan crystallites which spread and filled the spaces in the chitosan structure. Also, it’s noted that chitosan can delay the rate of cement hydration to a small value, which may help in hot weathering concrete.
{"title":"The impact of using natural waste biopolymer cement on the properties of traditional/fibrous concrete","authors":"Sameh Yehia, Arafa M. Ibrahim, Doaa F. Ahmed","doi":"10.1007/s41062-023-01253-z","DOIUrl":"https://doi.org/10.1007/s41062-023-01253-z","url":null,"abstract":"Abstract The naturally occurring wastes contain a large number of active groups. In this study, shrimp shell wastes were modified chemically to form chitosan. When mixing concrete with a natural polymer the result revealed a synergistic impact on the characteristics and functionality of the concrete structure. The formed chitosan was characterized by Fourier-Transform Infrared Spectroscopy (FT-IR), Thermogravimetric Analysis (TGA), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). Five concrete mixes were designed to achieve the study objective. For certain concrete mixes, admixtures such as a natural polymer (chitosan), and chemical (superplasticizer) were added with 0.05% by weight of the cement content. Those admixtures were added to study their behavior on the characteristics of the concrete mixes, and then compare test results with control concrete mixes. Also, the purpose of the experiment was expanded to study the impact of adding the admixtures to fibrous concrete, as this fibrous concrete faces interlocking due to steel fiber's presence in the fresh concrete mixture. The results indicated that concrete-embedded chitosan exhibited significant enhancement in the mechanical properties. Further, the surface shape of concrete was characterized by the presence of chitosan crystallites which spread and filled the spaces in the chitosan structure. Also, it’s noted that chitosan can delay the rate of cement hydration to a small value, which may help in hot weathering concrete.","PeriodicalId":13525,"journal":{"name":"Innovative Infrastructure Solutions","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136209500","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：