以甘肃兰州地铁一号线某地铁车站为工程背景,基于ADINA分析软件32CPU有限元显式计算平台,建立地基土与车站结构相互作用的非线性地震响应计算模型.数值分析在El-Centro、Kobe和兰州波的多遇地震条件下其车站及地基土的动力响应差异.结果表明:车站结构振型与周围地基土振型基本一致;车站底板、中板及顶板的加速度时程曲线形状基本相同;中柱和侧墙均随着埋深的增加其水平位移减小;车站周围的地表土体均发生了不同程度的沉降,其距车站7.5 m范围的沉降尤为显著,致使周围建筑物会遭受到一定程度的损坏.%Based on the explicit finite method of the ADINA software and the 32-CPU parallel computing cluster platform, a nonlinear seismic response calculation model of the interaction between the foundation soil and the station structure is established to study its nonlinear seismic response to the El-Centro, recorded Kobe ground motions, and the Lanzhou artificial waves under frequent seismic activity.Using the subway station of the subway line 1 in Lanzhou as an example, the results indicate that the vibration mode of the subway structure is similar to the foundation soil and the shape of the acceleration versus time-history curves of the midpoint of the ceiling, middle, and bottom of the subway station are all basically similar.Also, as the buried depth increases, the horizontal displacement of the center pillar and side wall decreases;the surface ground around the subway station produces a different degree of settlement.The settlement away from the subway station in the 7.5-m range is particularly serious because it led to partial damage around the buildings.
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