大体积浅埋Y型柱地铁车站振动台试验研究  

Shaking-Table Experiment for a Large, Shallow Metro Station with a Y-Column Structure

作　　者：吴秉林 陶连金[1] 李积栋[2] 李书龙[1] 

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点试验室,北京100124 [2]中国建筑工程总公司技术中心,北京101300

出　　处：《现代隧道技术》2015年第6期92-98,110,共8页Modern Tunnelling Technology

基　　金：国家自然科学基金重点项目(51038009);北京市自然科学基金重点项目(8111001)

摘　　要：文章以北京地铁6号线2期新华大街Y型柱地铁车站为工程背景,通过车站模型振动台试验,研究了不同地震动作用下大体积浅埋Y型柱地铁车站结构的地震响应特性。研究结果表明:(1)相同强度地震波作用下,Y型柱顶部峰值加速度大于底部加速度,且两者差值随着输入地震波强度的增加而增大;(2)同一埋深条件下,Y型柱应变大于边墙的应变,柱应变反应最值出现在下柱中间位置,柱分叉点应变值也较大;边墙最大应变出现在顶部,最小应变出现在中部;(3)同一地震波下,随着埋深的增加位移幅值减小,即模型上部的位移大于下部位移,这种不一致的相对位移变化可能增加结构的内力,对结构造成破坏。Based on the Xinhua street station of the phase II project of Beijing metro line 6, the seismic response behaviors of a large, shallow metro station with a Y-column under different seismic actions were studied by a shaking-table test of a station model. The study results show that：1） under the effect of seismic waves with the same intensity, the peak acceleration at the top of the Y-column is larger than that at the bottom, and the differ- ence increases incrementally with seismic wave intensity; 2） at the same overburden depth, the strain of the Y- column is larger than that of the side wall, and the maximum strain of the column appears in the middle of the lower Y-column, with the strain at the branching point of the column also being high. The maximum strain of the side wall appears at the top and the minimum strain at the middle; under the same seismic wave, the displace- ment amplitude decreases with an increase of the overburden depth, indicating that the displacement of the upper part is larger than that of the lower part of the model. The inconsistency of the relative displacement variations could increase the internal force of the structure and cause damage to the structure itself.

关 键 词：地铁车站 Y型柱 地震响应 振动台 

分 类 号：TU93[建筑科学—结构工程]