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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7.5m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。
Taking a metro station of Lanzhou Subway Line of Gansu as an example, based on the 32CPU finite element explicit calculation platform of ADINA software, a nonlinear seismic response calculation model of interaction between subsoil and station structure is established. Numerical analysis of the dynamic response of the stations and foundations under the conditions of frequent earthquake in El-Centro, Kobe and Lanzhou waves. The results show that the vibration modes of the station structure are basically the same as the vibration modes of the surrounding foundation soil. The acceleration time history curves of the bottom plate, the mid plate and the roof plate of the station are basically the same. The horizontal displacement of the center column and the side wall decreases with the increase of the buried depth. Subsidence of surface soil around the station all occurred in different degrees. The settlement within 7.5m from the station was particularly significant, causing the surrounding buildings to suffer a certain degree of damage.