二维层状地基波阻板隔振分析  

2-D analysis of vibration isolation by wave impeding block in layered ground

作　　者：高广运[1] 冯世进[1] 李伟 郑建国 

机构地区：[1]同济大学地下建筑与工程系,上海200029 [2]上海申元岩土工程有限公司,上海200011 [3]中国联合工程公司,浙江杭州310022

出　　处：《振动工程学报》2007年第2期174-179,共6页Journal of Vibration Engineering

基　　金：国家自然科学基金重点项目(50538010;50678128);高等学校博士学科点专项科研基金(20050247030)

摘　　要：为了研究层状地基中波阻板的隔振效果,基于薄层法在研究层状介质中波的传播问题的高效性、边界单元法处理无限域问题的精确性,结合两种方法的优点,本文采用以薄层法层状半空间基本解答作为格林函数的边界元法,分别对上软下硬和上硬下软两种层状半空间地基中波阻板的隔振效果进行分析。研究表明:增加波阻板的厚度、提高波阻板的弹性模量可以显著提高隔振效果;分层土体厚度和土性对于水平和竖向的位移振幅衰减系数有较大影响。Thin-layered method （TLM） is very efficient for the study of the wave propagation in layered media, and while boundary element method （BEM） is precise for solving the infinite domain problems. To combine the advantages of these two methods, in this paper, the fundamental solution of stratified half-space, that is obtained via TLM, is employed as the Green function for BEM,and then the vibration isolation effect of wave impeding block （WlB） in stratified half-space is analyzed in detail. The results show that the increments of both the thickness and the modulus of WlB lead to a pretty good isolation effect. It is also found that the properties and thickness of layered soils significantly affect the effect of ground vibration isolation in horizontal and vertical directions.

关 键 词：层状地基 波阻板 隔振 薄层法 边界元 

分 类 号：TU435[建筑科学—岩土工程]