【摘要】 介绍了饱和砂土多屈服面动本构模型的基本原理,将其运用到围岩的整体刚度矩阵计算中,对三维地铁车站进行了地震响应分析,并与按单屈服面模型理论计算结果进行比较,说明了对地铁地震响应分析时采用多屈服面动本构模型的必要性.分析了沿隧道轴向,应力与位移的变化趋势,从而说明,以往所采用的二维平面模型是存在弊端的,有必要建立三维模型进行地震响应分析.更多还原

【Abstract】 This paper firstly describes the theory of elastoplastic constitutive model of saturated sands, and puts forward the stress-strain model in calculation of the rigidity matrix. Seismic analysis is carried out for a 3D metro tunnel. The importance of applying the multi-yield surface elastoplastic constitutive models is emphasizes through comparisons of it with single yield surface constitutive models. Study of the trend of displacement and stress along the axis of the tunnel illustrates that seismic analysis based on 2D model has its disadvantages, so the applicant of 3D model is necessary.更多还原