斜撑安装位置对车站吊架横向抗震性能影响的试验研究  

Experimental Study on the Influence of Installation Position of Horizontal Bracing on Seismic Performance of Seismic Bracing in Subway Station

作　　者：靳永福 闫超 杨澄宇[3] 蔡雪松 JIN Yongfu;YAN Chao;YANG Chengyu;CAI Xuesong(Wuxi Metro Group Co.,Ltd.,Wuxi 214000,China;Guangzhou Metro Design&Research Institute Co.,Ltd.,Guangzhou 510010,China;State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]无锡地铁集团有限公司,无锡214000 [2]广州地铁设计研究院股份有限公司,广州510010 [3]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2023年第2期107-115,共9页Structural Engineers

摘　　要：地铁车站中的吊架用于挂载风管、水管、通讯电缆等设备。在地震过程中,由于设备自身的质量会引起较大的水平向地震惯性力,有可能导致非结构构件的失效破坏,进而影响地铁车站的使用。目前针对地铁车站内非结构构件的研究相对较少,非结构构件的动力响应、破坏机理不明确,缺乏成熟的抗震设计方法。本文采用拟静力试验的方式,对三种斜撑安装形式的地铁车站吊架的抗震性能进行了研究。通过分析试验现象、滞回曲线和应变数值,并结合有限元数值模拟结果,讨论了不同试件的受力特点和破坏机理。根据结果,建议将横向斜撑安装在中间一档横梁位置以充分发挥斜撑的抗震性能;试验中发生的破坏都是由于连接件错位滑脱或连接件自身剪断/拉断破坏造成的,在实际工程中宜重点关注。Bracings in subway stations are used to mount air ducts,water pipes,communication cables and other equipment.Under an earthquake attack,due to the dead weight of the equipment itself and the acceleration induced by ground motion,equipment will create large horizontal inertia force,which may lead to the damage or failure of nonstructural components,hence affects the operation of subway system.At present,there are relatively few studies on seismic performance of nonstructural members in subway stations.Dynamic response and failure mechanism of nonstructural members are still not clear,and practical seismic design method is also in short.The dynamic performance of seismic bracing with three types of horizontal bracings is studied in this paper.The quasi-static test is adopted in this study.The dynamic response and failure mode of all three specimens are discussed by experimental phenomena,hysteretic curves and strain values,combined with the results of finite element analysis.Based on the results of this study,it is recommended to install the horizontal bracing at the location of middle crossbeam to maximize its seismic efficacy.One more finding is that all failures in this test are caused by slippage or material failure of connector,which should be paid more attention to in following construction.

关 键 词：非结构构件 抗震支吊架 拟静力试验 抗震性能 

分 类 号：U231.4[交通运输工程—道路与铁道工程]