高速铁路客站站厅结构竖向地震激励的振动台试验研究  

Shaking Table Test Research on Station Hall Structure of High-speed Railway Station under Vertical Earthquake Excitation

作　　者：余志武[1,2] 刘汉云[1] 国巍[1,2] 邬亮[1] 

机构地区：[1]中南大学土木工程学院,长沙410075 [2]高速铁路建造技术国家工程实验室,长沙410075

出　　处：《防灾减灾工程学报》2014年第4期443-450,共8页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(50938008;51108466);长江学者和创新团队发展计划(IRT1296);湖南省研究生科研创新项目(2014)资助

摘　　要：新型"房桥合一"高速铁路客站站厅往往采用大跨度钢桁架结构形式,其特点是上弦有混凝土楼板,为候车厅,上下弦中间为设备层,整个桁架承受较大荷载,对竖向地震较为敏感。选取具有一定代表性的天津西站站厅结构,基于相似理论,制定了1/20缩尺的9桁架单元典型模型及试验方案;输入多量级典型地震波,完成了检验其竖向抗震性能的振动台试验研究,并与有限元计算结果比较,获得了大跨站厅结构在不同水准竖向地震下的动力响应特性和屈服机制;指出当前该站厅结构抗震性能良好,薄弱环节集中于主次桁架的端部斜腹杆及节点处,主要构件并没有出现屈服破坏。The station hall of new type of integrated building-bridge high-speed railway station of- ten take the form of long span steel truss structure. Station hall structure is concrete floors in the upper string, which is made for the waiting hall. What is more, the device layer is in the middle of upper sting and the lower one. To sum up, the whole truss under high load is more sensitive to the vertical earthquake. This paper takes a certain representative Tianjin West Railway Station hall structure for example, designs the ratio of 1/20 reduced scale of the nine truss element typi- cal model and plans experimental program based on the similarity theory. Then, inputs multiple- magnitude typical seismic waves, completes the shaking table research on testing vertical seismic performance, compares with finite element calculation and acquired the dynamic response charac- teristics and yielding mechanism of large-span station hall structure under different levels＇ verti- cal earthquake excitation. The results indicate that the current designed station hall structure has good seismic performance and weak links focus on the end oblique abdominal rod of the primary and secondary trusses and nodes while the yield failure of main components does not occur.

关 键 词：高速铁路客站 站厅结构 房桥合一 竖向地震 振动台试验 抗震性能 

分 类 号：TU352.1[建筑科学—结构工程]