水平振动激励下的层状软土振动及其隔振分析  

Analysis of Vibration and Isolation in Layered Soft Soils under Horizontal Vibration Excitation

作　　者：张帅[1] 陈清军[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2014年第2期67-73,共7页Structural Engineers

基　　金：科技部国家重点试验室基础研究资助项目(SLDRCE08-B-03)

摘　　要：振动对环境的影响愈来愈严重,水平向振动及其隔振问题受到人们的关注。以上海市区某典型软土场地为背景,采用ANSYS软件建立分析模型,以水平向振动作为激励,分别进行了三维层状软土场地的振动反应特征分析,以及空沟隔振效果的二维和三维有限元分析,探讨了不同深度、不同位置的空沟屏障隔振效果。结果表明,空沟屏障隔振对地表振动有良好的隔振效果,但空沟沟后会出现一个小范围的屏障失效区。Ground vibration induced by man-made sources becomes a more and more serious problem for envi- ronment. Horizontal vibration and reduction attract more attentions. Based on environmental vibration, the finite element model of typical soft soils in Shanghai was simulated in ANSYS. The model was subjected to the horizontal vibration excitation. Ground responses of three-dimensional layered soils were obtained and the isolation efficiency of open trench with various depth and location was investigated. It is shown that the trench is efficient for isolating the ground vibration, but the barrier failure occurs in a small-scale area behind the trench.

关 键 词：水平振动激励 层状软土场地 空沟隔振效果分析 有限元法 

分 类 号：TU43[建筑科学—岩土工程]