Seismic performance of the cantilever segment in prefabricated stepped beam–column joints

Yun Li, Yi An, Xin Cheng, Wenda Li, Yuehan Jin
{"title":"Seismic performance of the cantilever segment in prefabricated stepped beam–column joints","authors":"Yun Li, Yi An, Xin Cheng, Wenda Li, Yuehan Jin","doi":"10.1002/tal.2170","DOIUrl":null,"url":null,"abstract":"The seismic performance and construction speed of the prefabricated steel structures are greatly influenced by the configuration of the beam–column joints. The stepped beam–column joint proposed in this paper, featuring with flush surfaces on both the upper and lower beam flanges, was designed to satisfy the requirements of favorable seismic resistance and high installation efficiency. Notably, the junction between the stepped cantilever segment and the stepped beam segment is crucial in the stepped joint. Therefore, cyclic loading tests were conducted on two cantilever specimens with different connection forms to determine their seismic behavior and failure modes. The experimental results indicated that the connection forms have a minor effect on the elastic phase behavior. However, a significant influence was observed on the ultimate load‐bearing capacity and energy dissipation. The result also indicated that the specimen with a thicker end plate exhibited excellent seismic performance, with favorable load‐bearing and plastic deformation capacity. The seismic performance of the joint specimen with U‐shaped latch was inferior, with the welding seam on the flange connected to the end plate tearing prematurely due to the stress concentration. Besides, elaborate finite element models were established, which were confirmed by the test results. Finally, parametric analysis considering the effect of end plate thickness was conducted, and the bolts' forces during the loading progress on the connection surfaces were analyzed. The result indicated that the joint's load‐bearing capacity and stiffness would decrease with the reduction of end plate thickness.","PeriodicalId":501238,"journal":{"name":"The Structural Design of Tall and Special Buildings","volume":"19 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The Structural Design of Tall and Special Buildings","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/tal.2170","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

The seismic performance and construction speed of the prefabricated steel structures are greatly influenced by the configuration of the beam–column joints. The stepped beam–column joint proposed in this paper, featuring with flush surfaces on both the upper and lower beam flanges, was designed to satisfy the requirements of favorable seismic resistance and high installation efficiency. Notably, the junction between the stepped cantilever segment and the stepped beam segment is crucial in the stepped joint. Therefore, cyclic loading tests were conducted on two cantilever specimens with different connection forms to determine their seismic behavior and failure modes. The experimental results indicated that the connection forms have a minor effect on the elastic phase behavior. However, a significant influence was observed on the ultimate load‐bearing capacity and energy dissipation. The result also indicated that the specimen with a thicker end plate exhibited excellent seismic performance, with favorable load‐bearing and plastic deformation capacity. The seismic performance of the joint specimen with U‐shaped latch was inferior, with the welding seam on the flange connected to the end plate tearing prematurely due to the stress concentration. Besides, elaborate finite element models were established, which were confirmed by the test results. Finally, parametric analysis considering the effect of end plate thickness was conducted, and the bolts' forces during the loading progress on the connection surfaces were analyzed. The result indicated that the joint's load‐bearing capacity and stiffness would decrease with the reduction of end plate thickness.
预制阶梯梁柱连接中悬臂段的抗震性能
预制钢结构的抗震性能和施工速度在很大程度上受到梁柱连接构造的影响。本文提出的阶梯式梁柱连接结构,上下梁翼缘表面平齐,可满足良好的抗震性能和较高的安装效率要求。值得注意的是,在阶梯式连接中,阶梯式悬臂段和阶梯式梁段之间的交界处至关重要。因此,对采用不同连接形式的两个悬臂试件进行了循环加载试验,以确定其抗震行为和破坏模式。实验结果表明,连接形式对弹性阶段的行为影响较小。但对极限承载能力和能量耗散的影响很大。结果还表明,端板较厚的试样具有良好的抗震性能,承载能力和塑性变形能力都很强。而带有 U 型插销的连接试件抗震性能较差,与端板连接的凸缘焊缝因应力集中而过早撕裂。此外,还建立了精细的有限元模型,并得到了试验结果的证实。最后,进行了考虑端板厚度影响的参数分析,并分析了加载过程中螺栓在连接面上的作用力。结果表明,接头的承载能力和刚度会随着端板厚度的减小而降低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信