桩身参数对单桩荷载传递影响的模拟分析

Simulation Analysis on Influence of Parameters of Pile on Load Transfer of Pile

摘要:

假定不同的桩土参数和加载工况,采用修正的指数曲线模型作为荷载传递函数,应用MATLAB语言编制程序，以矩阵位移法分析桩身荷载传递特性,模拟桩身参数的变化对单桩荷载传递机理的影响.分析结果显示,当长径比较大时,大部分荷载由桩身侧面传递,桩端分担比例不大；在其他条件不变时,仅提高桩身刚度或长径比，对桩端分担比例或桩体承载性能的提高并不显著.

Abstract:

An exponential curve model is modified for load transfer function,and matrix displacement method programmed by MATLAB language is used to the analysis of load transfer of pile. With different parameters of pile and soil as well as loading conditions,simulation analysis is made of the influence by changing the parameters of pile on load transfer mechanism of pile.Results show that the major load is transferred by the pile side and the rest is shared by pile tip when the length-diameter ratio is larger.When only enhancing the pile stiffness or increasing the length-diameter ratio,no remarkable improvement appears in the proportion shared by tip and bearing capacity of pile.