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采用Byrne简化的Martin-Finn振动孔压增量模型描述土体的液化特性,采用Davidenkov黏弹性本构模型描述土体的非线性特性,建立了可液化地基-地铁车站结构非线性静、动力耦合相互作用的二维分析模型,采用动力有效应力分析方法对可液化地基上两层三跨岛式地铁车站结构的地震动反应进行了数值分析,并与动力总应力方法分析的结果进行对比,结果表明:地铁车站结构两侧及底部邻近位置的土体较易液化,地基土的液化对地下结构邻近地表的加速度反应有明显的影响,且在地基土液化的影响下地下结构有明显上浮的趋势,并呈现出中部上凸的变形特征,地下结构的破坏型式为上层顶板和底板两端的受拉破坏、下层底板边跨跨中的上拱弯曲破坏、中柱的受压破坏、侧墙底端的弯曲破坏。
Using the simplified Martin-Finn vibration pore pressure increment model by Byrne to describe the liquefaction characteristics of soil, the nonlinear characteristics of soil are described by using Davidenkov viscoelastic constitutive model and the nonlinear static and dynamic coupling of liquefiable foundation is established Interaction analysis model of two-dimensional analysis of dynamic response of cantilever liquefiable ground with two three-storey subway station structure of the ground motion response of the numerical analysis and analysis of the results with the results of the total dynamic stress method The results show that the soil near the two sides and the bottom of metro station structure is liquefied easily, and the liquefaction of foundation soil has a significant effect on the acceleration response of the subsurface structures nearby the ground surface, and the subsurface structure obviously floats under the influence of liquefaction of foundation soil , And showed the deformation characteristics of the central convex, the destruction of the underground structure of the upper roof and floor at both ends of the tensile failure, the lower floor span of the upper arch bending damage, the column of the pressure failure, the bottom of the side wall Bending damage.