为了研究地铁车站中柱在地震作用下的响应,运用先进截面整体分析,从中获取位移响应施加于构建精细构件模型的思路,实现了地铁车站中柱在地震作用下的三维弹塑性时程分析。首先对地铁车站进行截面弹塑性时程分析,获取中柱两端的相对位移时程响应,施加于中柱的精细模型两端,以达到模拟中柱在地震作用下的时程反应的目的。结果显示,在施加的罕遇地震作用下,3.94s时中柱产生大规模的塑性区,在4.6s和5.0s时,中柱端部的混凝土相继失效甚至脱落,完全形成塑性铰。中柱的精细模拟与地铁车站截面模拟的结果吻合,并且与实际震害非常相似。

The paper has analyzed the mid-column section and come up with the idea of displacement response which was applied on rigorous component model. Three-dimensional elastic-plastic time history analysis of subway station mid-column under earthquake action was achiered. The subway station was submitted to sectional elastic-plastic time history analysis,and relative displacement time history response of both ends of the mid-column was obtained. Then relative displacement time history response was applied to the both ends of elaborate model of mid-column to achieve the time history response in the earthquake action. The results showed that mid-column generated a large-scale plastic zone when rare earthquake was applied at 3.94s. In addition, the concrete of the end portion of mid-column failed, even fell off, and the plastic hinge fully formed at 4.6s and 5.0s. The results of refinement simulation of mid-column was in accordance with that of section simulation of subway station. Moreover it was very similar to the actual earthquake damage.