【摘要】 跨断层埋地管线系统主要由管线及其周围土体两种不同介质组成,具有分析介质不连续性特性。为实现对管-土接触介质的不连续性分析,采用非连续变形分析与有限元分析相结合的方法,将跨逆断层埋地管线系统从实际工作状态中取出一部分作为分析对象。利用有限元分析方法对管线及其周围土体进行网格划分;而管-土之间的相互作用,利用非连续变形分析中的不连续介质接触处理方法实现模拟。通过模型的数值分析,研究了逆断层作用下管-土之间的非连续变形相互作用状态,验证了利用非连续变形分析与有限元方法相结合解决埋地管线-土接触的可行性和有效性,为管-土相互作用分析提供了新的研究思路和研究方法。更多还原

【Abstract】 The buried pipeline subject to reverse-fault is studied,which mainly composite with two different materials,buried pipeline and the surrounding soil.The buried pipeline subject to reverse-fault is divided from its actual working state and the analysis system is discontinuous medium.The discontinuous deformation analysis(DDA) coupled with finite element method(FEM) is proposed.The pipe is dispersed with beam elements,the soil discretized with iso-parameter elements based on FEM.And the pipe-soil interaction is described using DDA.According to the analysis model,the pipe-soil contact status is studied.The results verify the feasibility and effectiveness of using DDA coupled with FEM to study buried pipeline.The study provides a new approach and new technique for studying pipe-soil discontinuous medium interaction.更多还原