防灾减灾工程学报2018，Vol.38Issue(1)：22-29,167,9.DOI:10.13409/j.cnki.jdpme.2018.01.004
静载作用下埋地管道数值模拟及其力学性能分析
Numerical Simulation and Mechanical Performance Analysis of Buried Pipes Subjected to Static Load
摘要
Abstract
Mechanical and deformation performance of buried pipes subjected to static loads was investigated through finite element method(FEM).The numerical results were verified by published experimental results from model tests,and then the effects of relative density(Dr),width of load plate(B),location of load plate(L),buried depth(H) and wall thickness of pipes (t) on the performance of buried pipes were studied comprehensively.The numerical results showed that limit bearing capacity of load plate above buried pipe remarkably increases with increase of relative density,and radial deformation and strains of pipe decrease under the same loading level;circumferential compression strains constitute a major part of pipe strains.With increase of width of load plate,the limit bearing capacity of load plate above buried pipe increases linearly and radial deformation and strains in pipes increase significantly.By increasing the buried depth continually,the limit bearing capacity of load plate above buried pipe increases firstly and then decreases,and it lastly tends to be steady.For the buried depth of 3D,the vertical earth pressure at the top of pipe is about half of that without pipes,witch indicates that there is remarkable soil arching effect above pipes.Increasing the horizontal distance from center of load plate to circle point of pipes doesn't affect greatly the radial deformation and strain in pipes,but the distribution of radial deformation and strains along pipes varies with buried depth.Additionally,increasing wall thickness of pipes,which doesn't result in great change of radial deformation and limit bearing capacity of load plate above buried pipe,is helpful for reducing hoop strains.关键词
埋地管道/有限元/模型试验/力学性能/静载Key words
buried pipes/finite element method/model test/mechanical performance/static load分类
建筑与水利引用本文复制引用
肖成志,王嘉勇,杨爱克..静载作用下埋地管道数值模拟及其力学性能分析[J].防灾减灾工程学报,2018,38(1):22-29,167,9.基金项目
国家自然基金项目(50909032)、河北省自然基金项目(E2014202038)、河北省研究生创新项目(CXZZSS2017027)资助 （50909032）
