摘要
研究目的:装配式混凝土技术因其生产高效、便于连接、节能环保等优势逐渐广泛应用于地下结构,针对装配式构件连接抗震性能较差的特点,本文提出一种型钢插入式连接的装配式出入口结构,并探讨其接缝抗震性能。通过采用低周反复试验,得到型钢连接节点的承载能力、耗能能力、刚度、破坏形态等指标,并对型钢承插接口的抗震性能进行评价。研究结论:(1)试验及分析结果表明,试件破坏形态均为侧墙整体受弯延性破坏;(2)与现浇试件相比,装配式试件峰值承载力、刚度、延性及耗能等指标与现浇试件基本接近;(3)在保证峰值承载力基本相当的前提下,型钢长度500 mm的试件具有较好的延性与耗能性能,且相对经济,建议作为装配式出入口接缝连接构造的优选方案。
Research purposes:Prefabricated concrete technology has been widely used in underground structures because of its advantages of high production efficiency,easy connection,energy conservation and environmental protection.In view of the poor seismic performance of prefabricated member connections,this paper proposes a fabricated access structure with section steel plug-in connections,and discusses its joint seismic performance.Through the low cycle repeated test,the bearing capacity,energy dissipation capacity,stiffness,failure mode and other indicators of the steel connection joints are obtained and the seismic performance of the steel socket joints is evaluated.Research conclusions:(1)The test and analysis results show that the failure mode of the specimens is the flexural ductility failure of the side wall as a whole.(2)Compared with cast-in-place specimens,the peak load-bearing capacity,stiffness,ductility and energy consumption of fabricated specimens are basically similar to those of cast-in-place specimens.(3)On the premise that the peak bearing capacity is basically the same,the specimen with a length of 500 mm of section steel has good ductility and energy dissipation performance,and is relatively economical.It is recommended to be used as the preferred scheme for the connection structure of prefabricated access joints.
作者
徐军林
潘正义
许俊超
郭正兴
方城
朱张峰
XU Junlin;PAN Zhengyi;XU Junchao;GUO Zhengxing;FANG Cheng;ZHU Zhangfeng(China Railway Siyuan Survey and Design Group Co.Ltd,Wuhan,Hubei 430000,China;Southeast University,Nanjing,Jiangsu 210000,China;Nanjing Tech University,Nanjing,Jiangsu 210000,China)
出处
《铁道工程学报》
EI
北大核心
2022年第8期87-92,共6页
Journal of Railway Engineering Society
关键词
装配式出入口
低周反复试验
装配式混凝土
型钢插入式连接
抗震性能
subway entrance of prefabricated concrete
low-cycle repeated tests
prefabricated concrete
section steel plug-in connection
seismic performance
