横向荷载作用下桩-土耦合系统的土弹簧刚度  

Soil Spring Stiffness of Soil-Pile Coupling System under Transverse Load

作　　者：曾庆敦[1] 甄圣威[1] 

机构地区：[1]华南理工大学土木与交通学院,广东广州510640

出　　处：《中北大学学报（自然科学版）》2010年第4期383-388,共6页Journal of North University of China(Natural Science Edition)

基　　金：华南理工大学亚热带建筑科学国家重点实验室资助项目

摘　　要：为了较准确地计算横向荷载作用下桩-土耦合系统的土弹簧刚度,首先基于Mindlin公式得到了力与变形量之间的关系,导出了土弹簧刚度与深度以及土体参数之间的关系.由于公式较复杂,故采用Matlab软件编制程序,计算了各弹簧单元的刚度系数,最后使用ANSYS软件计算了在此弹簧刚度系数下桩的变形及各弹簧的压力.通过与常用的基于Boussinesq解导出弹簧刚度的计算结果比较,两种方法所求出的桩体位移吻合较好.结果表明:采用Mindlin导出的位移解能更准确地确定土弹簧刚度系数.In order to accurately calculate the stiffness of soil spring for pile-soil coupling system under transverse load,the relation between force and displacement was firstly obtained by using Mindlin′s formula and the relation between the stiffness of soil spring and depth as well as parameters of soil was derived.Because of the complexity of the formula,a program of Matlab software which can display spring stiffness was worked out directly.At last,the deformation of pile and the pressures on all soil springs were calculated with ANSYS.By comparing with the results based on Boussinesq′s solution,the displacements of plies calculated by two methods are relatively coincident.The results show that the stiffness coefficients of soil spring can be accurately determined by using Mindlin′s formula.

关 键 词：基桩 横向荷载 土弹簧 刚度 桩-土耦合系统 有限元法 

分 类 号：TU473.1[建筑科学—结构工程]