支撑与腰梁及连续墙节点抗震性能研究  

Research on the Seismic Behavior of Strut-waling-diaphragm Wall Joint

作　　者：麦家儿 卢晓智 何冠鸿 裴行凯 MAI Jiaer;LU Xiaozhi;HE Guanhong;PEI Xingkai(Guangzhou Metro Design&Research Institute Co.Ltd,Guangzhou,Guangdong 510669,China)

机构地区：[1]广州地铁设计研究院股份有限公司,广州510669

出　　处：《铁道工程学报》2024年第7期99-105,共7页Journal of Railway Engineering Society

基　　金：国家重点研发计划项目(2017YFB1201104)。

摘　　要：研究目的:装配式建筑技术具有材料能耗低、生产效率高等优点,国内已逐步将装配式建筑技术应用于地铁车站的建设当中。为适应广州地区常见的内支撑支护体系,广州地铁提出一种新型的装配式地铁车站形式,该地铁车站的临时支护结构将作为车站的永久结构,采用“两墙合一”的设计,因此该工程对其地下连续墙-腰梁-支撑连接节点的连接精度及力学性能要求较高。本文基于该工程背景,针对连续墙-腰梁-支撑连接节点的足尺构件进行低周循环加载试验,探究在本工程中采用钢板连接及接驳器连接两种连接方案的适用性及安全性,并对比两种足尺节点的抗震性能的差异。研究结论:(1)试验结果表明两种连接方式的节点均能满足装配式地铁车站结构的设计抗震性能要求;(2)两个构件的破坏位置均为腰梁与支撑连接处界面,在进行抗震设计时应加强该处的连接强度;(3)与钢筋接驳器连接的节点相比,钢板连接节点的强度退化小、刚度大、延性好、抗震性能更优,可优先作为该类装配式地铁车站的连接方式;(4)本研究成果可为装配式地铁车站节点的抗震设计提供参考。Research purposes:Prefabricated construction technology has advantages such as low material consumption and high production efficiency.In China,prefabricated construction technology has gradually been applied to the construction of metro stations.To adapt to the common internal support and protection system in Guangzhou,Guangzhou Metro has proposed a new form of prefabricated metro station.The temporary support structure of this metro station will serve as a permanent structure of the station,adopting a"two-in-one wall"design.Therefore,this project places high demands on the connection accuracy and mechanical performance of the strut-waling-diaphragm joint.Based on this project,low cycle loading tests were conducted on the full-scale joints to explore the applicability and safety of two connection schemes:steel plate and mechanical coupler connection used in this project.The seismic performance differences between the two full-scale joints were also compared.Research conclusions:(1)The test results showed that both types of connection methods can meet the seismic performance requirements for the design of prefabricated metro station structures.(2)The failure locations of both joints were at the interface between the waling beam and the strut.During the design phase,the connection strength at this location should be reinforced.(3)Compared to the coupler-connected joint,the steel plate-connected joint behaved with less strength degradation,higher stiffness,better ductility,and superior seismic performance.Therefore,steel plate connection joints should be prioritized as the preferred connection method for this type of prefabricated metro station.(4)The research results can provide reference for seismic design of prefabricated metro station nodes.

关 键 词：地铁车站 装配式结构 足尺试验 低周循环加载 

分 类 号：U25[交通运输工程—道路与铁道工程]