土体非线性对圆形隧道结构地震反应的影响  

Effect of Soil Nonlinearity on Seismic Response of Circular Tunnel Structures

作　　者：毛喜芳[1] 丁海平[1,2] 沈江元[1] 

机构地区：[1]苏州科技学院江苏省结构工程重点实验室,江苏苏州215011 [2]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《苏州科技学院学报（工程技术版）》2009年第2期17-20,共4页Journal of Suzhou University of Science and Technology （Engineering and Technology）

基　　金：江苏省青蓝工程中青年学术带头人资助项目;地震科学基金项目(A08045)

摘　　要：以圆形截面盾构隧道为模拟研究对象,利用快速拉格郎日分析的显式有限差分程序FLAC,分别讨论了土体为线性和非线性两种情况下,在不同刚度下隧道衬砌结构内力的变化规律。计算结果表明,土体弹性模量愈大,衬砌结构的内力愈小,且线性情况下衬砌结构的内力小于考虑土体非线性时衬砌结构的内力。With the shield tunnel of the circular section as the simulation object, using the explicit, finite difference program in ＂Fast Lagrangian Analysis of Continua＂, this paper discussed the changes of the liner structure internal force under the conditions of the linear soil and nonlinear soil. The results show that the greater the elastic modulus of soil is, condition is less than that the smaller the internal force of liner is, and the linear internal force under the liner of the nonlinear＇s.

关 键 词：有限差分法 FLAC 粘性边界 非线性 土-结构相互作用 

分 类 号：TU375.3[建筑科学—结构工程]