摘要
基于非线性动力学理论和有限元理论,运用ADINA有限元软件建立了管土模型,对地震作用下的埋地管线进行了动力分析。探讨了压缩模量、内摩擦角和黏聚力等土性力学参数以及地震作用等对埋地管线最大横向位移和最大等效应力的影响。结果表明:在地震作用下,土体的黏聚力越大,内摩擦角越小,埋地管线的最大横向位移就越小,而随着土体压缩模量的增加,埋地管线的最大横向位移先增大后减小;管线的最大等效应力随着土体压缩模量、内摩擦角的增加而减小,随着黏聚力的增大而增大;当地震荷载增大时,管线的最大横向位移和最大等效应力增大。
Based on the nonlinear dynamics theory and finite element theory, the pipe -soil model was established to analysis the dynamic response of the buried pipeline under the action of the earth- quake by applying the scaled finite element software adina . The impacts of the seismic action and soil mechanics parameters on the maximum transverse displacement and the maximum equivalent stress on buried pipeline have been discussed , where soil mechanics parameters includes three factors： modulus of compression,internal friction angle and cohesion. The results show that under the seismic action, the greater the cohesion of soil and the smaller internal friction angle , the smaller the maximum transverse displacement of buried pipeline ; With the increasing of compression modulus of soil, the transverse maximum displacement of buried pipeline first increases then decreases; Maximum equivalent stress of pipeline decreases with the increasing of soil compression modulus and the decreasing of internal friction angle , it also increases with the augment of cohesion; Besides, when the seismic load increases , the maximum transverse displacement and the maximum equivalent stress of pipeline increases.
出处
《低温建筑技术》
2015年第7期94-96,107,共4页
Low Temperature Architecture Technology
基金
国家自然科学基金项目(51208510)
关键词
地震作用
埋地管线
数值分析
动力分析
earthquake action
buried pipeline
numerical analysis
dynamic analysis
