饱和砂土振动液化过程中桩的响应数值模拟

首先通过桩土相互作用的振动台模型试验模拟饱和砂土的振动液化过程,并实测桩身应变等数据,为数值计算提供可供比较的试验数据;其次依据饱和弱化土层p-y关系,利用拟静力计算方法,应用温克尔地基梁模型数值模拟饱和砂土振动液化过程中桩身弯矩。通过拟静力计算结果和试验结果的对比分析,认为当桩顶惯性力的折减系数为0.6时,数值模拟结果成立。

Numerical Research on Pile Response during Vibro-liquefaction of Saturated Sands

First,through a pile-soil interaction shaking table model,this paper simulates the liquefaction process of saturated sands and measures the strain of a pile,which provides test data for numerical calculation;Second,based on the p-y relationship of degraded soil,pseudo static method and Winkler foundation beam model are used to simulate the pile bending moment during the liquefaction of saturated sands,through the pseudo static calculation results and the experimental results contrast analysis,it is considered that the numerical simulation result is established when the reduction coefficient of inertial force at the pile top is 0.6.