考虑地震动空间非一致性的地铁车站结构振动台试验数值研究

Research on the seismic responses of subway station subway structure under spatially non-uniform seismic ground motion based on shaking table tests

长度超过百米的地下结构受到地震动空间变异性的影响较大,为深入了解粉质粘土地基条件下地铁车站在非一致地震动激励下的动力反应规律,设计并完成了粉质粘土地基条件下非一致地震动激励下地铁车站模型的振动台试验。采用ABAQUS软件建立了三维有限元模型,模拟考虑非一致波动输入的地铁车站振动台试验模型。对比了有限元试验模型与振动台试验的基频和加速度结果,以及有限元试验模型与实际地铁车站有限元模型的内力和加速度结果。通过三者的相互验证,对非一致波动输入地铁车站振动台试验的方法进行了研究。

The spatial non-uniformity of seismic excitation has a relatively high influence on underground structure whose length is more than 100 meters. The shaking table tests were designed and conducted on scaled subway station model with silty clay foundation under non-uniform earthquake excitation. ABAQUS software is used to simulate the shaking table test of subway structure. The comparisons between the subway station shaking table test,finite elements model of shaking table model and the actual subway finite element model are done. It shows that the results of the three are in good agreement.