场地地形对地下结构抗震性能的影响

Site topography influence on seismic performance of underground structure

为了研究场地地形对地下结构地震反应的影响,采用有限元数值分析方法,以地基土-地铁站结构体系为研究对象,分析场地地形下土-地下结构体系的地震反应。作为初步研究,主要对水平地震输入下含土坡的单一土层地形展开分析,研究体系的地震反应规律,并探求不同坡度下的土-地下结构体系地震反应变化规律。

Based on soil - subway structure system, finite element method of numerical analysis is used to analyze seismic response of underground structure, so as to study the effect of site topography on underground structures. As a preliminary study, terrain with a single slope under horizontal seismic input is mainly considered, and its law of seismic response is studied. Seismic response law of soil - underground structure system under slope with different gradients is also analyzed, which can serve as a basis for further research.