摘要
在单桩沉降计算理论系统分析的基础上 ,提出杆系结构有限单元法与近似解析解相耦合的混合法 ,并编制计算程序SPSA2。采用双曲线模型 ,考虑桩身与桩周边界上的剪切滑移非线性。采用指数函数 ,模拟桩周介质的非均质性。提出LDBPs有效桩长的概念 ,系统分析有效桩长与桩顶容许变形的关系。
One hybrid method of finite element analysis of rod structure coupling with approached closed form solution for single piles settlement was established in the result from the analysis of the methodology of predicting settlement of single piles in a systematic way,and the program SPSA2 relevant to it had been written triumphantly. The non-linear behavior of the relationship of stress and strain in the interface between pile shaft and media surrounding it was described with thCable-stayed e hyperbolic Model. The distribution of soil shear modulus,G,down a pile is assumed to be a power function of depth for accounting for soil nonhomogeneity. The effective pile length was proposed, and the relation between the tolerance of pile top settlement with it was discussed in a systematic way.
出处
《公路交通科技》
CAS
CSCD
北大核心
2002年第6期80-83,87,共5页
Journal of Highway and Transportation Research and Development
关键词
近似解析解
杆系单元
有限单元法
耦合分析
单桩沉降
大直径钻孔灌注桩
桥梁
Key words:Large diameter bored piles
Settlement of single piles
Finite element method
Approached closed form solution
