中文摘要：

利用自行研制的三维叠层剪切模型箱,完成黏土层中典型三层三跨地铁车站模型的地震响应大型振动台试验。通过对车站模型结构和土层中的加速度时程及其傅里叶频率幅值谱的对比研究,分析地下结构动应变变化规律及结构破坏宏观现象。揭示地下结构地震破坏机制为地下结构地震响应主要受周围土层控制,土层相对较软时,地下结构易发生破坏。同时,埋深越浅,地下结构破坏越严重。地下结构的地震破坏模式是地下结构周围土体的剪切变形使结构产生层间相对位移,当位移过大时,楼板与侧墙将发生拉伸破坏。而柱子则在剪切或弯矩作用下可分别产生剪切破坏和弯曲破坏,或在同一根柱子上同时出现剪切和弯曲组合破坏。

英文摘要：

By use of self-designed laminar shear container,a shaking table test on underground structure which lays in clay is conducted. The results of comparing the acceleration time-history and Fourier spectrum of station model and soil,and the analyzing regulations of the underground structure dynamic strain and the underground structure failure macro phenomena show that the failure mechanism of underground structure under underground seismic response is mainly controlled by the surrounding soil. The softer soil is,the easier underground structure be damaged;the shallower the depth is,the more serious underground structures be damaged. Underground structure seismic damage mode is the relative displacement between adjacent layers caused by shear displacement of surrounding soil. When the displacement is too large,the floor and side-wall would appear tensile failure. Meanwhile , shear or bending moment acting on columns will cause shear damage , bending damage or combination of shear damage and bending damage.