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首页> 外文期刊>Advances in civil engineering >Effects of Burial Depth on the Seismic Response of Subway Station Structure Embedded in Saturated Soft Soil
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Effects of Burial Depth on the Seismic Response of Subway Station Structure Embedded in Saturated Soft Soil

机译：埋深对饱和软土中地铁车站结构地震响应的影响

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摘要

For the aim to study the effects of burial depth on seismic response in the subway station’s structure embedded in saturated soft soil, on the basis of the OpenSEES program, numerical models with four cases of burial depth for the nonlinear interaction system including subway station’s structure and saturated soft soil are developed with the u-p formulations of Biot’s theory as it seeks to describe the saturated two-phase media. The effects of burial depth on the seismic response and the failure pattern of the subway station structure are investigated. The numerical results show that (1) the burial depth has a significant effect on the nonuniform uplift of station’s structure due to the movement of soil from far field towards baseplate; (2) with the increase of burial depth, the inertial effect of overlaying soil of the subway station structure becomes more obvious, and the peak zone of the pore pressure ratio contracts from the outer area to the baseplate bottom with decreasing amplitude; (3) the dynamic index R decreases with the increasing burial depth of the station’s structure; and (4) in terms of the middle column, the burial depth of the station’s structure has the most crucial effect on the additional dynamic shear force and bending moment at the top end.
机译：为了研究埋深对埋在饱和软土中的地铁站结构的地震反应的影响，在OpenSEES程序的基础上，为地下相互作用的非线性相互作用系统（包括地铁站的结构和结构）建立了四种埋藏深度的数值模型。饱和软土是根据Biot理论的向上公式开发的，旨在描述饱和的两相介质。研究了埋深对地铁车站结构地震反应和破坏模式的影响。数值结果表明：（1）由于土壤从远场向底板移动，埋藏深度对站结构的非均匀抬升有显着影响; （2）随着埋深的增加，地铁车站结构覆土的惯性作用变得更加明显，孔隙压力比的峰值区从外部向底板底部收缩，幅度减小。 （3）动态指数R随着车站结构埋深的增加而减小; （4）就中柱而言，车站结构的埋葬深度对顶端的额外动态剪力和弯矩具有最关键的影响。

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