倾斜荷载下基桩的改进有限元——有限层分析方法  

BEHAVIOR OF PILES UNDER INCLINED LOADS BY THE IMPROVED FINITE ELEMENT-FINITE LAYER METHOD

作　　者：赵明华[1] 邹新军[1] 邹银生[1] 郭玉荣[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《工程力学》2004年第3期129-133,共5页Engineering Mechanics

基　　金：教育部高等学校博士学科点专项科研基金项目(20020532008)

摘　　要：提出地基加权刚度的概念,对现有有限元有限层法进行改进,用以分析计算倾斜荷载下基桩的受力变形特性,可考虑地基土成层与非均匀性等因素的影响,并能近似考虑地基土的非线性特征及桩身PΔ效应,工程应用结果表明,效果良好。The concept of weighted foundation modulus is advanced in this paper to improve the existing finite element-finite layer method. The improved finite element-finite layer method is then used to analyze the characteristics of the inner forces and deformation of piles under inclined loads. Not only may the influence of the stratification and non-homogeneity of subsoil and other factors be considered, but the nonlinear property of soil around the pile can be reasonably evaluated as well. Besides, the D-P effect along the pile shaft due to the co-action of axial and lateral loads is also studied. Results show that the proposed improved finite element-finite layer method is more effective for the analysis of pile behavior under inclined loads.

关 键 词：桩基础 倾斜荷载 改进有限元-有限层法 P-△效应 地基加权刚度 

分 类 号：TU473[建筑科学—结构工程]