地下T型交叉管廊纵向抗震设计方法  

Longitudinal seismic design of T-type underground precast utility tunnels

作　　者：梁建文[1] 李东桥 LIANG Jianwen;LI Dongqiao(School of Civil Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学建筑工程学院,天津300350

出　　处：《岩土工程学报》2023年第8期1635-1643,共9页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(51978462)。

摘　　要：基于反应位移法基本原理,提出了地下T型交叉管廊纵向抗震设计的一个方法。该方法引入周期性地层变形输入,分析一个地层变形周期内交叉管廊的变形历程,寻找交叉节点处变形和内力的最不利模式;通过正交试验分析,研究了场地、地震动等参数对最不利模式的敏感性。研究表明,周期性地层变形输入可以捕捉交叉管廊的变形和内力的最不利模式,地震波入射角度对交叉管廊变形和内力最不利模式起控制作用;方法可直接用于地下交叉型结构的纵向抗震设计。Based on the response deformation method,a longitudinal seismic design method for underground cross utility tunnels is proposed.By changing the phase angle of the displacement function,which deforms the site for one period,the periodic ground deformation input is realized.The deformation history of T-type precast utility tunnels is analyzed,as well as the most unfavorable modes for structural deformation and internal forces around the cross node.Through the orthogonal test analysis,the seismic responses of the T-type underground utility tunnels under different site parameters and seismic input parameters are studied,as well as the sensitivity analysis for the most unfavorable modes.The results show that the periodic ground deformation input can catch the most unfavorable modes of structural deformation and internal forces,and the incident angle of seismic wave controls the most unfavorable modes of structural deformation and internal forces.The proposed method can be directly used for the longitudinal seismic design of underground cross structures.

关 键 词：预制管廊 T型交叉管廊 纵向抗震设计 变形历程 最不利模式 反应位移法 

分 类 号：TU435[建筑科学—岩土工程]