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

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.