埋地管线数值模拟中土体计算区域的选取问题研究
Study on the Selection of Soil Calculation Area in Numerical Simulation of the Buried Pipeline
刘鹏 1陈洪富 1孙柏涛1
作者信息
- 1. 中国地震局工程力学研究所地震工程与工程振动重点实验室,黑龙江哈尔滨 150080;地震灾害防治应急管理部重点实验室,黑龙江哈尔滨 150080
- 折叠
摘要
详细论述了动力无限元基本理论,提出了一种在非一致激励时无限元边界面上地震动的输入方法.在此基础上,考虑管线-土体之间的黏结滑移效应,采用动力无限元边界,建立了埋地管线的三维有限元-无限元耦合的精细化模型,对非一致地震波激励下埋地管线的动力响应进行了数值分析,对管线周围的土体计算范围的取值进行了系统研究,给出了管线周围土体的有效计算宽度W、有效计算长度L和有效计算深度H的取值范围.结果表明:W的取值与管径D紧密相关,H可取30～60m,L应至少包含一个地震动的卓越周期段的波长,此分析结果可满足大多数工程需求.
Abstract
In this paper,the basic theory of dynamic infinite element is discussed,and an input method for ground mo-tion at the boundary surface of the infinite element by non-uniform excitation is proposed.Then,on condition that the bond slip effect between pipelines and soil is involved,a refined model of buried pipelines,which couples three-dimensional finite element with infinite element,is established by using dynamic infinite element bounda-ries.The dynamic response of buried pipelines by the non-uniform seismic wave excitation is numerically ana-lyzed.The values of the calculation range of the soil around the pipeline are systematically studied,and the effec-tive width W,the effective length L,and the effective depth H of the soil around the pipeline are given.The results indicate that the value of W is closely related to the pipe diameter D;H can be taken between 30-60 m,and L should include at least one wavelength of the predominant period of the ground motion.In this case,the results can meet most engineering requirements.
关键词
埋地管线/无限元/边界条件/有限元分析/管线-土体相互作用Key words
buried pipeline/infinite element/boundary condition/finite element analysis/pipe-soil inter-action引用本文复制引用
基金项目
黑龙江省重点研发计划(GA22C001)
国家重点研发计划(2019YFC1509301)
出版年
2024
NETL
NSTL
维普
万方数据