埋深对土-地下结构地震反应的影响

Embedment depth influence on seismic performance of underground structure

利用MSC.Marc建立土-地下结构相互作用有限元模型,以土-地下结构为研究对象,对水平地震作用下深埋地下结构工况展开分析,研究了土-地下结构的地震反应规律,对地基土随地表变化的加速度峰值、随埋深变化的加速度峰值、地下结构的加速度峰值、地下结构的应变进行了具体分析;研究了三种埋深工况下地基土与结构的地震反应规律,经过对比分析,证明地下结构埋深越浅,地下结构与土层的地震反应越强烈。

Based on soil-subway structure system,soil-underground structure interaction finite element model is established by MSC. Marc. The response of underground structure when embedded deeper under the action of the horizontal seismic is considered. Specific analysis the peak acceleration in different surface point and buried depth point,the peak acceleration of underground structure and the strain of underground structure; the response of soil and structure in three working conditions is discussed. Though comparative analysis,prove that the more shallow underground structure buried,the stronger underground structure and the soil layer seismic response.