考虑预应力影响的壳-弹簧模型及其在预制地下管廊纵向抗震分析中的应用  

Shell-spring model for longitudinal seismic analysis of precast utility tunnels considering prestress

作　　者：梁建文[1] 李东桥 王长祥[2] 甘梦云 闫启超 LIANG Jianwen;LI Dongqiao;WANG Changxiang;GAN Mengyun;YAN Qichao(School of Civil Engineering,Tianjin University,Tianjin 300350,China;North China Municipal Engineering Design&Research Institute Co.,Ltd.,Tianjin 300074,China)

机构地区：[1]天津大学建筑工程学院,天津300350 [2]中国市政工程华北设计研究院有限公司,天津300074

出　　处：《地震工程与工程振动》2021年第4期13-22,共10页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51978462);国家重点研发项目(2017YFC0805000)。

摘　　要：利用ABAQUS有限元软件,采用壳单元模拟管廊结构,非线性地基弹簧单元模拟土-结构相互作用,非线性弹簧单元模拟带止水橡胶的承插式接头和预应力钢绞线,提出了一种考虑预应力影响的预制地下管廊纵向抗震分析的壳-弹簧有限元模型,并基于反应位移法分析了某拟建预制地下双舱管廊在地震波作用下的内力和变形。研究表明:文中壳-弹簧模型充分反映了预制地下管廊纵向接头构造及初始装配预应力,以及地震作用下的结构真实变形及内力分布,适用于预制地下管廊的纵向抗震分析。Using ABAQUS finite element software,a shell-spring model considering the steel strand prestress for longitudinal seismic analysis of precast utility tunnels is proposed.The shell element is used to simulate the utility tunnel structure,the nonlinear foundation spring is used to simulate the soil-structure interaction,and the nonlinear spring element is used to simulate the socket joint and the steel strand prestress.The response deformation method is utilized to calculate the response of two-cabin precast utility tunnels under seismic wave is studied.It is shown that,the shell-spring model can fully describes the joint structure and the initial prestress of precastutility tunnels,as well as the loss of the prestress and joint failure mechanism under seismic wave,which is suitable for longitudinal seismic analysis of precastutility tunnels.

关 键 词：预制地下管廊 纵向抗震分析 壳-弹簧模型 预应力 反应位移法 

分 类 号：TU452[建筑科学—岩土工程]