近年来，地下结构在能源、交通、城市建设和国防工程等方面获得广泛应用。由于我国大部分地区为地震设防区，地下结构的抗震设计具有重要的理论意义和实用价值，日益成为工程设计人员关心的重要问题。本文主要进行了场地及地下结构地震反应的数值分析研究。通过采用适当的边界条件，建立合理的计算模型，运用有限单元法分析地下结构地震反应，讨论其动力响应规律。

In recent years, underground structures have been utilized widely in energy sources, traffic, city construction, and national defending engineering, etc. As most areas of our country belong to earthquake-fortified regions, anti-seism and security evaluation of underground structures has important academic theoretical and practical value. On the basis of relevant boundary conditions and the establishment of reasonable numeration model, this paper analyzes layering level soil and underground structures through utilizing FEM (finite element method).