基于接触单元的埋地管线有限元抗震分析  

Seismic Finite-Element Analysis of Buried Pipeline Based on Contact-Element

作　　者：陈家伟[1] 叶志明[1] 陈玲俐[1] 

机构地区：[1]上海大学土木工程系,上海200072

出　　处：《上海大学学报（自然科学版）》2009年第3期306-309,315,共5页Journal of Shanghai University:Natural Science Edition

基　　金：上海市科委重大基础研究资助项目(04JC14035)

摘　　要：埋地管线有多种简化计算模型,但计算结果相差较大.管土之间的相互作用可以看成管土接触问题,利用接触单元建立埋地管线及土体三维实体模型,并对地震荷载作用下的管线进行应力计算,给出了最大轴向应力.对比规范方法、理论方法、梁-土弹簧模型、管土接触模型的4种计算结果,现有简化模型的计算结果偏小,偏于不安全.There are some simple models of pipeline with clearly different results. Interaction between the pipeline and soil can be considered as pipe-soil contact. Based on the pipe-soil contact model, a 3D finite-element model of buried pipeline and soil is established in the paper. Seismic responses of pipeline and the axis stress are given. Comparison among several methods including the standard method, a theoretical method, the beam-soil-spring model and the proposed pipe-soil contact model show that the results of simple models are too small and not safe enough.

关 键 词：地下管线 管土接触 地震分析 有限元法 

分 类 号：TU961[建筑科学]