{"title":"砖砌体结合钢木构件改造的实验研究和分析模型","authors":"Survesh Chetival, Sanjay Chikermane","doi":"10.1617/s11527-024-02490-z","DOIUrl":null,"url":null,"abstract":"<div><p>Masonry is a complex structural material with different properties due to a combination of units and mortar. Masonry has very high compressive strength, but when subjected to lateral forces such as earthquakes, its load-carrying capacity reduces significantly because of low tensile capacity. For this research, an experimental study was carried out to study brick masonry's behaviour and failure pattern. A retrofitting scheme was proposed to enhance in-plane load-carrying capacity under push-over loading conditions. A push-over test was performed on the brick masonry walls, and after failure, it was retrofitted and subjected to loading. The retrofitted wall has increased the masonry's load-carrying capacity and enhanced its ductile behaviour, having a yield drift of 8.63%. As the proposed system undergoes large deformations before failure, the behaviour factor R is calculated as 4.53 for ductility of 10.8. Masonry and its components are characterised by performing laboratory experiments and compared with previous studies. The mechanical properties of brick units, mortar, and masonry prism are obtained according to suitable code procedures. An analytical model based on the virtual work approach is developed to estimate failure patterns and load-carrying capacity. The analytical model predicts a failure pattern for conventional brick walls, the same as the experiment failure pattern.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":null,"pages":null},"PeriodicalIF":3.4000,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental investigation and analytical model of brick masonry retrofitted by combination of steel and timber members\",\"authors\":\"Survesh Chetival, Sanjay Chikermane\",\"doi\":\"10.1617/s11527-024-02490-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Masonry is a complex structural material with different properties due to a combination of units and mortar. Masonry has very high compressive strength, but when subjected to lateral forces such as earthquakes, its load-carrying capacity reduces significantly because of low tensile capacity. For this research, an experimental study was carried out to study brick masonry's behaviour and failure pattern. A retrofitting scheme was proposed to enhance in-plane load-carrying capacity under push-over loading conditions. A push-over test was performed on the brick masonry walls, and after failure, it was retrofitted and subjected to loading. The retrofitted wall has increased the masonry's load-carrying capacity and enhanced its ductile behaviour, having a yield drift of 8.63%. As the proposed system undergoes large deformations before failure, the behaviour factor R is calculated as 4.53 for ductility of 10.8. Masonry and its components are characterised by performing laboratory experiments and compared with previous studies. The mechanical properties of brick units, mortar, and masonry prism are obtained according to suitable code procedures. An analytical model based on the virtual work approach is developed to estimate failure patterns and load-carrying capacity. The analytical model predicts a failure pattern for conventional brick walls, the same as the experiment failure pattern.</p></div>\",\"PeriodicalId\":691,\"journal\":{\"name\":\"Materials and Structures\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2024-10-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials and Structures\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1617/s11527-024-02490-z\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials and Structures","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1617/s11527-024-02490-z","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
摘要
砌体是一种复杂的结构材料,由于单元和砂浆的组合而具有不同的特性。砌体具有很高的抗压强度,但在受到地震等侧向力作用时,由于抗拉能力较低,其承载能力会大大降低。在这项研究中,对砖砌体的行为和破坏模式进行了实验研究。研究提出了一种改造方案,以提高砖砌体在推覆荷载条件下的平面承载能力。对砖砌体墙体进行了推倒试验,试验失败后,对其进行了改造并使其承受荷载。改造后的墙体提高了砌体的承载能力,增强了其延展性能,屈服漂移为 8.63%。由于拟建系统在失效前会发生较大变形,因此计算出延展性为 10.8 的行为系数 R 为 4.53。通过实验室实验对砌体及其组成部分进行了表征,并与之前的研究进行了比较。砖单元、砂浆和砌体棱柱的力学性能是根据适当的规范程序获得的。基于虚功方法开发了一个分析模型,用于估算破坏模式和承载能力。分析模型预测了传统砖墙的破坏模式,与实验破坏模式相同。
Experimental investigation and analytical model of brick masonry retrofitted by combination of steel and timber members
Masonry is a complex structural material with different properties due to a combination of units and mortar. Masonry has very high compressive strength, but when subjected to lateral forces such as earthquakes, its load-carrying capacity reduces significantly because of low tensile capacity. For this research, an experimental study was carried out to study brick masonry's behaviour and failure pattern. A retrofitting scheme was proposed to enhance in-plane load-carrying capacity under push-over loading conditions. A push-over test was performed on the brick masonry walls, and after failure, it was retrofitted and subjected to loading. The retrofitted wall has increased the masonry's load-carrying capacity and enhanced its ductile behaviour, having a yield drift of 8.63%. As the proposed system undergoes large deformations before failure, the behaviour factor R is calculated as 4.53 for ductility of 10.8. Masonry and its components are characterised by performing laboratory experiments and compared with previous studies. The mechanical properties of brick units, mortar, and masonry prism are obtained according to suitable code procedures. An analytical model based on the virtual work approach is developed to estimate failure patterns and load-carrying capacity. The analytical model predicts a failure pattern for conventional brick walls, the same as the experiment failure pattern.
期刊介绍:
Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.