桩基弦振效应的数值模拟与性能分析

Numerical Simulation and Performance Analysis of the Degree of Lateral Oscillation of Pile

文章利用C++语言编制了ANSYS到FLAC的接口程序,模拟了砂土粘聚力、内摩擦角、标贯数、桩长细比、动荷载等因素对液化砂土中桩的弦振效应的影响,得出了相关的规律曲线及各因素影响的敏感曲线。研究结果表明,桩基弦振效应随砂土粘聚力、内摩擦角、标贯数、动荷载频率、桩弹性模量的增加而减小,随桩长细比、动荷载振幅增加而增大。

In this paper, using assembly language C^＋＋ complied some procedures which can exchange models from ANSYS to FLAC, Some factors which leading to the lateral oscillation of pile are studied, and according to the numerical simulation, some useful conclusions are achieved. The degree of liquefaction of saturated sand grows with the increasing of soil layer depth, cohesive strength,but it not sensitive to the internal friction angle of soil. The degree of lateral oscillation of pile reduces with the raising of cohesive strength, internal friction angle, load frequency, elasticity coefficient of pile, but it enhances with the adding of pile slenderness ratio,load＇s oscillation.