场地沉陷下PVC管抗震试验的数值模拟分析  

Numerical simulation analysis of seismic experiment on PVC pipelines subjected to site subsidence

作　　者：贾晓辉[1,2] 刘爱文[2] 杨歧焱[1] 李姜[1] 刘檀[1] 牛露[1] 

机构地区：[1]河北省地震局,河北石家庄050021 [2]中国地震局地球物理研究所,北京100081

出　　处：《世界地震工程》2016年第3期101-105,共5页World Earthquake Engineering

基　　金：地震行业专项(201308018);国家自然科学基金(51078335);河北省地震科技星火计划项目(DZ201504177011)

摘　　要：为研究PVC管的抗震性能,依据日本学者对PVC管所做的场地沉陷下的试验布局,建立了场地沉陷下PVC管的三维有限元模型。模拟结果显示,在50cm的沉陷位移作用下,沉陷区的接口发生了转动破坏;在沉陷区与非沉陷区的过渡区域,PVC管体进入了塑性。由管体壳单元、接口单元和土弹簧单元组成的有限元模型,能比较真实地给出管体和接口的变形。试验与数值模拟结果均表明,PVC管的抗震性能较弱。In order to study the seismic performance of polyvinyl chloride （PVC） pipelines, a 3D finite element model of PVC pipelines subjected to subsidence was established. The finite element model is built on the experi- ment, which is designed by Japanese scholars. As the FEM simulation shows, when the settlement displacement is up to 50cm, large rotation failure of joint in the subsidence zone is found. In addition, plastic deformation of pipe body is produced in the transition area of non - settlement and settlement. The finite element model, consisting of shell element, joint element and soil spring element, can present the deformation of pipe body and joint more actu- ally. Both the experiment and numerical simulation come to the conclusion that the seismic performance of PVC pipelines is weaker.

关 键 词：PVC管 场地沉陷 抗震试验 数值模拟 

分 类 号：P315.93[天文地球—地震学]