支盘桩的非线性有限元分析

为了分析支盘桩在不同工作条件下的工作性能及桩土相互作用机理,采用ANSYS软件,借助不同的土体力学参数,对支盘桩进行了非线性有限元数值模拟研究.计算表明,支盘分担了大量上部荷载,并且其分担的比例跟所施加的荷载及土体的弹性模量有关;支盘桩塑性区的贯通是由下向上发展的;桩顶土体水平位移向轴,从桩体第一个支盘附近起,桩周土水平位移背轴;荷载达到一定值时,支盘会与其上部土体发生脱离.

Non-linear Finite Element Analysis of Squeezed Branch Pile

In order to analyze the capability of squeezed branch pile under different work conditions and the cooperation mechanism between the pile and soil, non-liner numerical simulation is carried out using ANSYS. Contact interface elements are placed between the pile and soil. It is shown that the squeezed branches take lots of load, and the ratio is related to the load and the elastic modulus of soil. The plastic section of the soil is run-through from bottom to the top. The horizontal displacement of the top soil goes to the pile, but the horizontal displacement of the soil of the bottom goes away from the pile. The squeezed branch will break away from the soil above the squeezed branch when the load is big enough.