双向地震下高铁客站抗震性能的振动台试验研究

Shaking table test research of high-speed railway station under bi-directional earthquake excitation

"房桥合一"新型混合结构体系作为高速铁路大型客站典型结构形式,其结构特征复杂,抗震性能并不明确,理论和数值分析之外尚缺少试验论证。以天津西站典型结构为例,进行缩尺比为1/35的振动台模型试验,研究其在多级双向典型地震波激励下的抗震性能,通过试验分析并与有限元计算结果比较,获得了客站典型结构在不同水准双向地震下的动力响应特性和结构损伤情况,指出当前所设计客站结构的抗震性能良好、设计偏于保守、薄弱环节主要集中于上部屋盖结构。

'Building-Bridge Integrated System( BBIS) 'is one of the commonly used structure types in High-Speed Railway station,and it has a complex structure and unclear seismic performance. Moreover,BBIS structure is still short of experiments to verify. Based on the typical structure of Tianjin West Railway Station example,carries on the scale ratio of 1/35 of the shaking table model test was conducted and research on the multi-stage bidirectional typical seismic behavior under seismic excitation was performed. Through comparing the results of experiment analysis with the finite element calculation,obtain the dynamic response characteristics and damage district of the structure under different level bidirectional earthquake was obtained. Meanwhile,the study points out that the seismic performance of current design station structure is good but conservative,the weak position is mainly concentrated in the upper roof structure.