{"title":"A brief commentary on MSc teaching of timber structural analysis at UCL","authors":"W. Sebastian","doi":"10.1680/jstbu.23.00032","DOIUrl":"https://doi.org/10.1680/jstbu.23.00032","url":null,"abstract":"","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87238539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Commentary: Reflections on the Turkey-Syria Earthquakes of 06 February 2023","authors":"D. D’Ayala","doi":"10.1680/jstbu.23.00027","DOIUrl":"https://doi.org/10.1680/jstbu.23.00027","url":null,"abstract":"","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83529110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
River crossing bridges in seismically active regions are typically susceptible to two natural hazards – earthquakes and floods. For such bridges, design parameters related to piers may play major roles on bridge multihazard performance. The current study explores the same for key bridge design parameters – aspect ratio and longitudinal reinforcement ratio for piers, and differential ground elevation between multiple bents. Multihazard condition at the southeast part of Nepal is considered as hazard condition at testbed. Regional seismic hazard is represented with a suite of earthquakes generated based on regional seismic design spectra. Due to the regional flood hazard, expected pier scour of investigated bridges are estimated from 100-year flood discharge (including climate change projection) in the Koshi river, Nepal. Three-dimensional finite element models of chosen bridges, without and with scour, are developed including ±10% variations in the stated design parameters. Fragility and risk curves of the investigated bridges are developed and compared to assess relative influences of the design parameters on performance of these bridges. Observations signify that pier aspect ratio and longitudinal reinforcement ratio can significantly influence the multihazard performance of riverine bridges. Research outcome also demonstrates how design parameters may be revised to perform risk-targeted multihazard design of bridges.
{"title":"Effect of bridge design parameters on multihazard performance of river crossing bridges","authors":"D. Devendiran, S. Banerjee","doi":"10.1680/jstbu.22.00168","DOIUrl":"https://doi.org/10.1680/jstbu.22.00168","url":null,"abstract":"River crossing bridges in seismically active regions are typically susceptible to two natural hazards – earthquakes and floods. For such bridges, design parameters related to piers may play major roles on bridge multihazard performance. The current study explores the same for key bridge design parameters – aspect ratio and longitudinal reinforcement ratio for piers, and differential ground elevation between multiple bents. Multihazard condition at the southeast part of Nepal is considered as hazard condition at testbed. Regional seismic hazard is represented with a suite of earthquakes generated based on regional seismic design spectra. Due to the regional flood hazard, expected pier scour of investigated bridges are estimated from 100-year flood discharge (including climate change projection) in the Koshi river, Nepal. Three-dimensional finite element models of chosen bridges, without and with scour, are developed including ±10% variations in the stated design parameters. Fragility and risk curves of the investigated bridges are developed and compared to assess relative influences of the design parameters on performance of these bridges. Observations signify that pier aspect ratio and longitudinal reinforcement ratio can significantly influence the multihazard performance of riverine bridges. Research outcome also demonstrates how design parameters may be revised to perform risk-targeted multihazard design of bridges.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82305104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
It is common practice in earthquake-prone areas to design structures with earthquake loading in mind. The severity of the structure's damage depends on the earthquake's magnitude and the type of structure. Sometimes, the high-intensity earthquake can trigger explosive materials to explode inside the structures. This combination of loading scenarios could lead to an overall increase in damage to the structures. So, it is essential to study the vulnerability analysis of the structures subjected to multi-hazard loading scenarios. This study mainly discusses the combined effect of the earthquake followed by the blast loading on the reinforced concrete structure. The results show that damage to the structure increases under combined earthquake and blast loading. Furthermore, the earthquake-induced vibrations in the structure intensify after the blast load. A parametric study of the structure is also performed, taking into account the possible load combinations of earthquake and blast loading. Moreover, this study discusses a numerical solution to the aforementioned problem, which strengthens fundamental knowledge and provides structure engineer a deeper insight of multihazard loading scenario considered in this study.
{"title":"Vulnerability analysis of earthquake driven blast load on the reinforced concrete structure","authors":"Shivani Verma, M. Goel, N. Sirdesai","doi":"10.1680/jstbu.22.00165","DOIUrl":"https://doi.org/10.1680/jstbu.22.00165","url":null,"abstract":"It is common practice in earthquake-prone areas to design structures with earthquake loading in mind. The severity of the structure's damage depends on the earthquake's magnitude and the type of structure. Sometimes, the high-intensity earthquake can trigger explosive materials to explode inside the structures. This combination of loading scenarios could lead to an overall increase in damage to the structures. So, it is essential to study the vulnerability analysis of the structures subjected to multi-hazard loading scenarios. This study mainly discusses the combined effect of the earthquake followed by the blast loading on the reinforced concrete structure. The results show that damage to the structure increases under combined earthquake and blast loading. Furthermore, the earthquake-induced vibrations in the structure intensify after the blast load. A parametric study of the structure is also performed, taking into account the possible load combinations of earthquake and blast loading. Moreover, this study discusses a numerical solution to the aforementioned problem, which strengthens fundamental knowledge and provides structure engineer a deeper insight of multihazard loading scenario considered in this study.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85386396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The construction industry is responsible for nearly half of the UK's carbon emissions, and the use of an extremely large volume of concrete, the world's most widely used man-made material, accounts for more than 7% of global CO2 emissions. The scale of this problem spawned research that explored the potential for structurally efficient non-prismatic geometries to substantially reduce the amount of concrete in building elements, thus also reducing their embodied carbon footprint. In particular, the research focused on segmented thin concrete shells as floor slabs, leveraging computational design and digital fabrication methodologies to automate their production off-site. An important part of this research was the development of a computational framework for the design of thin concrete shells, to make such construction methodology accessible to building designers in practice. The framework combined solutions for parametric modelling, finite element analysis, isogeometric analysis, form finding and optimisation, and also embedded fabrication constraints specific to the project's automated manufacturing system. This paper documents the application of the developed computational framework in the design of a 4.5m x 4.5m prototype, illustrating how automating concrete construction can transform the industry towards net-zero.
建筑业占英国碳排放量的近一半，而混凝土是世界上使用最广泛的人造材料，其使用量极大，占全球二氧化碳排放量的7%以上。这个问题的规模催生了研究，探索了结构高效的非棱柱几何结构的潜力，从而大大减少了建筑元素中的混凝土量，从而也减少了它们的碳足迹。特别地，该研究侧重于分段薄混凝土壳作为楼板，利用计算设计和数字制造方法来实现场外生产的自动化。这项研究的一个重要部分是开发一种用于设计薄混凝土壳的计算框架，使建筑设计师在实践中可以使用这种施工方法。该框架结合了参数化建模、有限元分析、等几何分析、形式查找和优化的解决方案，以及特定于项目自动化制造系统的嵌入式制造约束。本文记录了开发的计算框架在4.5m x 4.5m原型设计中的应用，说明了自动化混凝土施工如何将行业转变为净零。
{"title":"Computational design exploration of a segmented concrete shell building floor system","authors":"E. Costa, R. Oval, P. Shepherd, J. Orr","doi":"10.1680/jstbu.22.00156","DOIUrl":"https://doi.org/10.1680/jstbu.22.00156","url":null,"abstract":"The construction industry is responsible for nearly half of the UK's carbon emissions, and the use of an extremely large volume of concrete, the world's most widely used man-made material, accounts for more than 7% of global CO2 emissions. The scale of this problem spawned research that explored the potential for structurally efficient non-prismatic geometries to substantially reduce the amount of concrete in building elements, thus also reducing their embodied carbon footprint. In particular, the research focused on segmented thin concrete shells as floor slabs, leveraging computational design and digital fabrication methodologies to automate their production off-site. An important part of this research was the development of a computational framework for the design of thin concrete shells, to make such construction methodology accessible to building designers in practice. The framework combined solutions for parametric modelling, finite element analysis, isogeometric analysis, form finding and optimisation, and also embedded fabrication constraints specific to the project's automated manufacturing system. This paper documents the application of the developed computational framework in the design of a 4.5m x 4.5m prototype, illustrating how automating concrete construction can transform the industry towards net-zero.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89054546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mahsa Saeidzadeh, M. Chenaghlou, Arash Akbari Hamed
Regarding the approved desired structural performance of the self-centering pinned beam-column connections with friction dampers (SC-PC-FD), it is required to present an accurate mechanical model of SC-PC-FD connection for easy modelling of the frames with this type of connections using the common commercial structural analysis and design software. Therefore, this paper presents a simple mechanical model and verifies its accuracy considering the obtained results by experimental and numerical studies on 2-strand and 4-strand SC-PC-FD connections. Moreover, the seismic performance of the frames with SC-PC-FD connections was evaluated using incremental dynamic analysis and compared to moment-resisting frames. For this purpose, 1-, 3- and 5-story building models with moment and SC-PC-FD connections were designed, and two-dimensional frames were subjected to the considered far-field, pulse near-field, and no-pulse near-field earthquake records as per FEMA-P695 and then, the collapse margin ratio (CMR) and fragility curves of these models were obtained. It was concluded that the developed component-based mechanical model accurately predicted the monotonic and cyclic behaviour of SC-PC-FD connection. Moreover, the amount of maximum residual interstory drift ratio, along with the number of developed plastic hinges at the main members of self-centering models was reduced significantly, and the novel system achieved more CMR values.
{"title":"On the mechanical model and seismic performance of frames with a self-centering connection","authors":"Mahsa Saeidzadeh, M. Chenaghlou, Arash Akbari Hamed","doi":"10.1680/jstbu.22.00233","DOIUrl":"https://doi.org/10.1680/jstbu.22.00233","url":null,"abstract":"Regarding the approved desired structural performance of the self-centering pinned beam-column connections with friction dampers (SC-PC-FD), it is required to present an accurate mechanical model of SC-PC-FD connection for easy modelling of the frames with this type of connections using the common commercial structural analysis and design software. Therefore, this paper presents a simple mechanical model and verifies its accuracy considering the obtained results by experimental and numerical studies on 2-strand and 4-strand SC-PC-FD connections. Moreover, the seismic performance of the frames with SC-PC-FD connections was evaluated using incremental dynamic analysis and compared to moment-resisting frames. For this purpose, 1-, 3- and 5-story building models with moment and SC-PC-FD connections were designed, and two-dimensional frames were subjected to the considered far-field, pulse near-field, and no-pulse near-field earthquake records as per FEMA-P695 and then, the collapse margin ratio (CMR) and fragility curves of these models were obtained. It was concluded that the developed component-based mechanical model accurately predicted the monotonic and cyclic behaviour of SC-PC-FD connection. Moreover, the amount of maximum residual interstory drift ratio, along with the number of developed plastic hinges at the main members of self-centering models was reduced significantly, and the novel system achieved more CMR values.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77325302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Headed studs are the shear connectors in composite structures used at the adjoining face of a steel beam and concrete slab. In this research, the conventional shape of a headed stud is restructured to resemble a coconut palm stem shape without change in overall material volume, aiming to improve the shear strength of the composite connection. Six innovative shear connectors named coconut palm stem royal-shaped headed stud shear connectors (CPSR studs) are proposed here for composite structures. The Abaqus/Explicit has been employed to model a push-out specimen. A proposed FE model was successfully validated with the experimental result published in the literature. The six different forms of CPSR studs encased in three grades of concrete (C40, C50, and C60) have been studied for shear strength, stiffness, and load-slip performance. Comparison of findings of the analysis of innovative CPSR studs have been made with uniformed cross-sectional headed studs, and results show the 35-41%, 37-44%, and 41-52% improvement in the ultimate strength of the shear connection when embedded in C40, C50, and C60 grade concrete, respectively. So, ultimately achieving economic reflection with improved shear strength capacity of headed stud shear connection without change in the overall volume of stud material.
{"title":"3D finite element analysis of innovative coconut palm stem shaped headed shear connectors","authors":"R. Pardeshi, Y. Patil","doi":"10.1680/jstbu.21.00169","DOIUrl":"https://doi.org/10.1680/jstbu.21.00169","url":null,"abstract":"Headed studs are the shear connectors in composite structures used at the adjoining face of a steel beam and concrete slab. In this research, the conventional shape of a headed stud is restructured to resemble a coconut palm stem shape without change in overall material volume, aiming to improve the shear strength of the composite connection. Six innovative shear connectors named coconut palm stem royal-shaped headed stud shear connectors (CPSR studs) are proposed here for composite structures. The Abaqus/Explicit has been employed to model a push-out specimen. A proposed FE model was successfully validated with the experimental result published in the literature. The six different forms of CPSR studs encased in three grades of concrete (C40, C50, and C60) have been studied for shear strength, stiffness, and load-slip performance. Comparison of findings of the analysis of innovative CPSR studs have been made with uniformed cross-sectional headed studs, and results show the 35-41%, 37-44%, and 41-52% improvement in the ultimate strength of the shear connection when embedded in C40, C50, and C60 grade concrete, respectively. So, ultimately achieving economic reflection with improved shear strength capacity of headed stud shear connection without change in the overall volume of stud material.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88251173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sangmoon Lee, B. Jeon, Sungwan Kim, Dawoon Yun, WooYoung Jung
It was intended to find a way to improve the earthquake resistance performance more effectively through various reinforcement methods regarding between the cabinet bottom and concrete slab, which is a vulnerable connection part in the event of an earthquake. In order to improve the earthquake resistance performance of an electric cabinet, methods such as installing a vibration isolation device, increasing the number of connecting bolts between cabinet bottom panel and base channel, welding a steel grid of cabinet bottom panel, etc. were considered and, in order to compare the performance of each case, a three-axis shaking table test was performed. As a result of comparing the seismic performance of each case according to the acceleration response, it was found that the reduction of seismic force was the best when applying the vibration isolation device. However, there is a disadvantage in that the spatial and temporal limitations are large and the unit price is high in field application. For this reason, it is predicted that a method of ensuring the higher rigidity of an electric cabinet by increasing the number of connecting bolts proved through this study would be a more economical and realistic seismic performance method in field application.
{"title":"Evaluating the applicability of seismic retrofit of an electric cabinet in a power plant","authors":"Sangmoon Lee, B. Jeon, Sungwan Kim, Dawoon Yun, WooYoung Jung","doi":"10.1680/jstbu.22.00058","DOIUrl":"https://doi.org/10.1680/jstbu.22.00058","url":null,"abstract":"It was intended to find a way to improve the earthquake resistance performance more effectively through various reinforcement methods regarding between the cabinet bottom and concrete slab, which is a vulnerable connection part in the event of an earthquake. In order to improve the earthquake resistance performance of an electric cabinet, methods such as installing a vibration isolation device, increasing the number of connecting bolts between cabinet bottom panel and base channel, welding a steel grid of cabinet bottom panel, etc. were considered and, in order to compare the performance of each case, a three-axis shaking table test was performed. As a result of comparing the seismic performance of each case according to the acceleration response, it was found that the reduction of seismic force was the best when applying the vibration isolation device. However, there is a disadvantage in that the spatial and temporal limitations are large and the unit price is high in field application. For this reason, it is predicted that a method of ensuring the higher rigidity of an electric cabinet by increasing the number of connecting bolts proved through this study would be a more economical and realistic seismic performance method in field application.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79998186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The response of sandwich structures under the synergistic effects of blast wave and fragments is a topic of interest for researchers and designers. Thus, the performance of sandwich structure used for enhancing the protection of target structure is numerically investigated because it may experience such complex loading condition occurring due to combined blast and fragment impact. The conventional sandwich structure modelled using aluminum alloy resisted bare blast load imposed on it. But, from the analysis, it is observed that fragments penetrated through front facesheet of the conventional sandwich structure, indicating a lower resistance of front facesheet to combined blast and fragment effects. Thus, behavior of conventional aluminum honeycomb sandwich structures is compared with enhanced sandwich configurations consisting of front facesheet covered with multilayer lightweight composite Kevlar® fabric material. The Kevlar® fabric arrested the maximum number of fragments, and reduced their momentum, thereby reducing the damage level of the sandwich structure. Further, the effect of the charge weight and shape of the fragments on the damage modes of the sandwich structure is also assessed. It is further observed that, with the increase in charge weight, the momentum of the fragments increases, and these penetrate the back facesheet of the sandwich structure.
{"title":"Performance of honeycomb sandwich structure under combined blast and impact of fragments","authors":"P. Shirbhate, M. Goel","doi":"10.1680/jstbu.22.00167","DOIUrl":"https://doi.org/10.1680/jstbu.22.00167","url":null,"abstract":"The response of sandwich structures under the synergistic effects of blast wave and fragments is a topic of interest for researchers and designers. Thus, the performance of sandwich structure used for enhancing the protection of target structure is numerically investigated because it may experience such complex loading condition occurring due to combined blast and fragment impact. The conventional sandwich structure modelled using aluminum alloy resisted bare blast load imposed on it. But, from the analysis, it is observed that fragments penetrated through front facesheet of the conventional sandwich structure, indicating a lower resistance of front facesheet to combined blast and fragment effects. Thus, behavior of conventional aluminum honeycomb sandwich structures is compared with enhanced sandwich configurations consisting of front facesheet covered with multilayer lightweight composite Kevlar® fabric material. The Kevlar® fabric arrested the maximum number of fragments, and reduced their momentum, thereby reducing the damage level of the sandwich structure. Further, the effect of the charge weight and shape of the fragments on the damage modes of the sandwich structure is also assessed. It is further observed that, with the increase in charge weight, the momentum of the fragments increases, and these penetrate the back facesheet of the sandwich structure.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85116950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To improve the seismic behavior of cold–formed steel (CFS) walls, a novel infilled CFS wall covered with wall sheathings was presented in this study. Four full–scale specimens were tested under cyclic lateral loads. The wall sheathings, including gypsum wallboards (GWBs), oriented strand boards (OSBs), and fiber cement boards (FCBs), were employed to investigate their impacts on the seismic performance of the walls. The failure process, failure mode, load–displacement curve, strength degradation, stiffness degradation, energy dissipation, deformation, and strain variation of the walls were investigated. Observations of the test showed that the failure modes of the walls are the failure of connections between the CFS frame and sheathing as well as the crushing of the infilled material. Because the peak loads and lateral stiffness of the walls were increased by 1.25–1.72 times compared with the specimen without sheathing, it can be seen that the sheathings play an important role in the lateral resistance of the walls. Additionally, an analysis model and calculation formulas for predicting the lateral stiffness of the walls were proposed. The comparisons between calculated value and experimental data indicated that the proposed theoretical method can accurately predict the lateral stiffness of the wall. Highlights: A new type of cold–formed thin–walled steel shear wall filled with phosphogypsum was proposed. Four full–scale specimens were tested to investigate the impacts of wall sheathings on the seismic behavior of the walls. A theoretical method for predicting lateral stiffness of infilled CFS walls was analyzed.
{"title":"Effect of wall sheathings on seismic behavior of phosphogypsum-filled CFS shear walls","authors":"Song Hu, Yong Huang, Li Zhou","doi":"10.1680/jstbu.22.00183","DOIUrl":"https://doi.org/10.1680/jstbu.22.00183","url":null,"abstract":"To improve the seismic behavior of cold–formed steel (CFS) walls, a novel infilled CFS wall covered with wall sheathings was presented in this study. Four full–scale specimens were tested under cyclic lateral loads. The wall sheathings, including gypsum wallboards (GWBs), oriented strand boards (OSBs), and fiber cement boards (FCBs), were employed to investigate their impacts on the seismic performance of the walls. The failure process, failure mode, load–displacement curve, strength degradation, stiffness degradation, energy dissipation, deformation, and strain variation of the walls were investigated. Observations of the test showed that the failure modes of the walls are the failure of connections between the CFS frame and sheathing as well as the crushing of the infilled material. Because the peak loads and lateral stiffness of the walls were increased by 1.25–1.72 times compared with the specimen without sheathing, it can be seen that the sheathings play an important role in the lateral resistance of the walls. Additionally, an analysis model and calculation formulas for predicting the lateral stiffness of the walls were proposed. The comparisons between calculated value and experimental data indicated that the proposed theoretical method can accurately predict the lateral stiffness of the wall. Highlights: A new type of cold–formed thin–walled steel shear wall filled with phosphogypsum was proposed. Four full–scale specimens were tested to investigate the impacts of wall sheathings on the seismic behavior of the walls. A theoretical method for predicting lateral stiffness of infilled CFS walls was analyzed.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72681418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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