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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。
Using finite element software ABAQUS, a three-dimensional numerical analysis model of shaking table test of seismic performance of pile foundation and composite foundation is established. The paper analyzes the stress and moment of pile foundation and composite foundation under the same ground motion and the peak acceleration of different soil layers Change characteristics. The results show that under the action of earthquake, the connection between pile top and cap, pile is the most unfavorable position in soft and hard layer of soil, and should be paid more attention in earthquake resistance design.