软土地基中立体交叉隧道地震动力响应分析  

Seismic dynamic response analysis of three-dimensional crossing tunnel on soft foundation

作　　者：胡建平[1] 刘亚莲[1] 

机构地区：[1]广东水利电力职业技术学院,广东广州510635

出　　处：《四川建筑科学研究》2013年第2期240-243,共4页Sichuan Building Science

基　　金：广东省科技计划项目(2009B060700114)

摘　　要：基于动力学基本方程,运用有限单元法和Newmark直接积分法,选用ADINA软件,研究了在不同方向地震作用下软土基地中立体交叉隧道群的位移、加速度和应力响应,并通过对其动力响应规律进行分析与比较得到:地震波输入方向不同,立体交叉隧道的位移、加速度和应力响应都不同;立体交叉隧道最大位移常出现在上部隧道的交叉部位,最大主拉应力一般出现在下部隧道出口顶部,最大主压应力通常发生在上部隧洞顶板与边墙连接处,且沿轴线方向接近均匀分布。为立体交叉隧道的设计与施工提供理论指导。The displacement,acceleration and stress response to seismic action of the three-dimensional crossing tunnel groups in soft foundation are analysed using ADINA,based on basic dynamic equations and with the application of finite element method and Newmark immediate integration.Analysis of its dynamic response rule reveals that the displacement,acceleration and stress response to seismic action of the three-dimensional crossing tunnel vary from different input directions of seismic wave.Also,the maximum displacement usually occurs at the crossing of upper tunnel,the maximum principle tensile stress often appears at the top of the exit to the lower tunnel,and the maximum principle compressive stress,which approximately evenly distributes along the axis,normally happens at the juncture of the roof of the upper tunnel and the sidewall.These results offer theoretical guidance to design and construction of three-dimensional crossing tunnel.

关 键 词：软土地基 立体交叉隧道 地震 动力响应分析 

分 类 号：TU93[建筑科学—结构工程]