With the development of urbanization, underground structures unavoidably come within the vicinity of ground surface structures, and interaction between ground structure, soil, and underground structure interaction can significantly affect the seismic response of underground structures. Three-dimensional high-fidelity numerical dynamic analysis is conducted to investigate underground structures' seismic response in saturated sand with and without a ground structure. In the numerical analysis, saturated sand is simulated using a plasticity constitutive model for large post-liquefaction deformation of sand. The numerical analysis method is first validated based on a centrifuge shaking table test for a ground structure-underground structure system in liquefiable sand, and then applied to reveal the influence of ground structures on nearby underground structure seismic behavior. Results show that nearby ground structures significantly affect the underground structure's seismic response in saturated sand. A ground structure directly above an underground structure can amplify the underground structure's dynamic internal forces and restrict its uplift, whereas a ground structure to the side can amplify the underground structure's deformation and cause rotation. Factors including relative structure positions, ground structure characteristics, and ground motion properties influence the ground structure's effects on the underground structure's seismic response.

随着城市化的发展，地下结构不可避免地会进入地表结构附近，地表结构，土壤之间的相互作用以及地下结构的相互作用会严重影响地下结构的地震反应。进行了三维高保真数值动力分析，以研究地下结构在有无地面结构的情况下在饱和砂土中的地震反应。在数值分析中，使用可塑性本构模型模拟饱和砂土，使砂土在液化后发生较大变形。首先基于离心振动台试验对液化砂土中地下结构系统的数值分析方法进行了验证，然后用于揭示地面结构对附近地下结构地震行为的影响。结果表明，附近的地面结构在饱和砂土中显着影响地下结构的地震响应。地下结构正上方的地面结构会放大地下结构的动态内力并限制其上扬，而侧面的地面结构会放大地下结构的变形并引起旋转。包括相对结构位置，地面结构特征和地震动特性在内的因素会影响地面结构对地下结构的地震响应的影响。饱和砂土中的地震响应。地下结构正上方的地面结构会放大地下结构的动态内力并限制其上扬，而侧面的地面结构会放大地下结构的变形并引起旋转。包括相对结构位置，地面结构特征和地震动特性在内的因素会影响地面结构对地下结构的地震响应的影响。饱和砂土中的地震响应。地下结构正上方的地面结构会放大地下结构的动态内力并限制其上扬，而侧面的地面结构会放大地下结构的变形并引起旋转。包括相对结构位置，地面结构特征和地震动特性在内的因素会影响地面结构对地下结构的地震响应的影响。