地铁车站与横跨桥梁耦联破坏数值模拟

以典型的两层三跨形式地铁车站为研究对象,采用非线性动力时程反应分析方法,对软土场地的地铁车站与上部交叉桥梁模型进行数值模拟分析,给出了一种潜在的地铁车站-桥梁耦联破坏模式,分析了地铁车站与上部桥梁的地震动力相互作用.数值模拟结果表明:桥梁对车站的地震响应影响较小,车站发生破坏主要取决于地震作用及其本身的强度;地铁车站发...

Numerical simulation of coupling failure between subway station and cross bridge

In this paper, a typical two-story and three-span subway station is taken as the research object. The nonlinear dynamic time-history analysis method is adopted to conduct numerical simulation analysis on the model of the subway station and the upper bridge on soft site. A potential coupling failure mode of subway station and bridge is presented. The seismic interaction between the subway station and the upper bridge is studied. Numerical simulation results show that: the bridge has a little effect on the seismic response of the station, and the damage of the station mainly depends on the earthquake action and structure strength; the destruction of the subway station will cause a large horizontal and vertical deformation of the soil in adjacent areas, resulting in the bridge beam fall; after the destruction of the station, the bridge foundation makes the soil move towards the station, which aggravates the earthquake damage of subway station.