单桩非线性分析的半解析半数值方法(英文)

桩的荷载沉降特性研究已受到工程界的普遍重视 ,研究认为桩土接触面处的非线性位移特性在荷载传递机理方面起着非常重要的作用 ,桩土接触面处的非线性位移特性可由沿桩身的摩阻力的发挥程度来反映 ,然而目前单桩的研究工作大部分是有关单桩的线弹性特性 ,进而得到单桩的荷载位移之间关系的数值解及计算表格。本文提出一个分析桩基沉降的计算模型 ,在该计算模型中 ,用荷载位移传递函数来描述桩身摩阻力和桩身位移的非线性关系 ,并用桩端位移法计算桩的荷载沉降。基于所提出的荷载位移传递函数 ,研究了多层土中单桩的荷载位移特性。

Non-linear behavior of a single pile

It is well recognized that the non linear behavior of pile soil interface plays an important role in analyzing the behavior of load transfer mechanism for a single pile, which can be reflected by the mobilization of shear stress developed along the pile shaft.However most previous works are focused on the linear elastic response of a single pile.In this paper, a transfer function is introduced to describe the non linear relationship between the shaft shear stress and displacement of pile shaft. Based on the proposed transfer function, an intensive research have been carried out to study the load transfer behavior for a single pile in multi layered soil.