桩基和刚性复合地基抗震性能的振动台试验数值模拟  

Seismic Resistance Simulation for Shaking Table Test of the Pile Foundation and the Rigid Composite Foundation

作　　者：倪克闯[1] 高文生[1] 

机构地区：[1]中国建筑科学研究院地基基础研究所,北京100013

出　　处：《建筑科学》2013年第5期25-29,共5页Building Science

基　　金：国家十二五课题:超高层建筑地基基础安全保障关键技术研究(20120106110131021)

摘　　要：采用有限元软件ABAQUS,建立桩基和刚性复合地基抗震性能振动台试验的三维数值分析模型,本文分析了桩基和复合地基在同一地震动条件下的应力、弯矩以及不同土层的加速度峰值变化特性。结果表明,在地震作用下,桩基桩顶与承台连接处、桩在土体软硬分层处是最不利位置,在抗震设计中应引起重视。A finite element model was developed, using ABAQUS, to conduct numerical pseudo shaking table test for analyzing the seismic behavior of the pile foundation and the rigid composite foundation. This paper analyzes the stress, moment, peak acceleration of both the pile foundation and the rigid composite foundation, subjected to the same earthquake ground motion. The results show that the weakest positions of the pile foundation are the connection joint between the pile top and at the surface between the hard and soft layered soils. Attention should be paid in the seismic design.

关 键 词：振动台试验 桩基 刚性复合地基 数值模拟 有限元 

分 类 号：TU473[建筑科学—结构工程] TU413.5[建筑科学—土工工程]