Innovative Infrastructure Solutions最新文献_第7页

Development of impact factor expression for the design and performance evaluation of long-span-balanced cantilever-type prestressed box girder bridges 大跨度平衡悬臂式预应力箱梁桥设计与性能评价影响因子表达式的发展

Innovative Infrastructure Solutions Pub Date : 2023-10-21 DOI: 10.1007/s41062-023-01251-1

Bindesh Nunia, J. Prashanth, S. Choudhury

引用次数: 0

Multi-criteria decision support system for bridge construction system selection utilizing value engineering and TOPSIS 基于价值工程和TOPSIS的桥梁施工体系选择多准则决策支持系统

Innovative Infrastructure Solutions Pub Date : 2023-10-18 DOI: 10.1007/s41062-023-01267-7

Alaa ElMarkaby, Abdelmonem Sanad, Ahmed Elyamany, Ebtisam Yehia

{"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}

引用次数: 0

Differential scanning calorimetry of aluminium EN AB-42000 alloy rheocasting semi-solid in different stage heating rates 不同阶段升温速率下EN AB-42000铝合金流变铸造半固态的差示扫描量热法

Innovative Infrastructure Solutions Pub Date : 2023-10-17 DOI: 10.1007/s41062-023-01256-w

Kawan M. Abdulrahman, Viktor Gonda, Mihály Réger

{"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}

引用次数: 0

A systematic approach for rework reduction in precast buildings in India 印度预制建筑返工减少的系统方法

Innovative Infrastructure Solutions Pub Date : 2023-10-17 DOI: 10.1007/s41062-023-01270-y

Pravin Minde, Mrudula Kulkarni, Abhaysinha G. Shelake, Omkar Jadhav, Rahul Dandage

引用次数: 0

Development of synthetic acceleration time histories for seismic ground response studies for site classes C to E for Bihar region: a case study 比哈尔邦地区C至E级场地地震地面反应研究中合成加速度时程的发展:一个案例研究

Innovative Infrastructure Solutions Pub Date : 2023-10-17 DOI: 10.1007/s41062-023-01265-9

Prabhakar Kumar, Shiv Shankar Kumar

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Experimental investigation of biochemical and geotechnical properties of municipal solid waste undergoing biodegradation for landfill design 城市生活垃圾生物降解的生物化学和岩土力学特性试验研究

Innovative Infrastructure Solutions Pub Date : 2023-10-15 DOI: 10.1007/s41062-023-01263-x

Swati Patil, Mahesh Endait

引用次数: 0

The flexural response of RC beams strengthened by EB/NSM techniques using FRP and metal materials: a state-of-the-art review 使用FRP和金属材料的EB/NSM技术加固RC梁的弯曲响应:最新的回顾

Innovative Infrastructure Solutions Pub Date : 2023-10-13 DOI: 10.1007/s41062-023-01245-z

F. A. Megahed, M. H. Seleem, A. A. M. Badawy, I. A. Sharaky

{"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}

引用次数: 0

Mechanical behavior of reinforced concrete hybrid beams made with normal concrete, foamed cellular concrete and fiber reinforced foamed cellular concrete 普通混凝土、泡沫泡沫混凝土和纤维增强泡沫泡沫混凝土混合梁的受力性能

Innovative Infrastructure Solutions Pub Date : 2023-10-13 DOI: 10.1007/s41062-023-01258-8

Facundo Atuel Retamal, Viviana Carolina Rougier

引用次数: 0

Optimizing the number of crews working in parallel and their work sequence to minimize project duration and cost for repetitive construction projects 优化并行工作的人员数量及其工作顺序，以最大限度地减少重复施工项目的项目持续时间和成本

Innovative Infrastructure Solutions Pub Date : 2023-10-11 DOI: 10.1007/s41062-023-01233-3

Emad Abdelbasset, Abbas Hassan, Nabil H. Amer, Yasser A. Khalifa

{"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}

引用次数: 0

The impact of using natural waste biopolymer cement on the properties of traditional/fibrous concrete 使用天然废生物聚合物水泥对传统纤维混凝土性能的影响

Innovative Infrastructure Solutions Pub Date : 2023-10-11 DOI: 10.1007/s41062-023-01253-z

Sameh Yehia, Arafa M. Ibrahim, Doaa F. Ahmed

{"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}

引用次数: 0