桩侧土非线性软化时单桩荷载—沉降曲线分析  

Analysis of Vertical Load-Settlement Curve of Single Pile on Nonlinear Softening of Side Resistance Force

作　　者：印长俊[1] 马石城[1] 王星华[2] 

机构地区：[1]湘潭大学土木工程与力学学院,湖南湘潭411105 [2]中南大学土木建筑学院,湖南长沙410075

出　　处：《湘潭大学自然科学学报》2008年第2期72-76,共5页Natural Science Journal of Xiangtan University

基　　金：湖南省科技厅重点资助项目(04SK2008)

摘　　要：基于桩身竖向荷载传递的微分方程,并考虑了桩侧阻力的非线性软化行为,推导出桩身轴力和桩土相对位移关系的增量形式表达式.通过该表达式并依据位移协调法的原理编写的程序,计算出了桩身的荷载沉降曲线.结果表明:计算出的荷载沉降曲线与试验曲线吻合较好,并能反映桩的渐进破坏过程.Based on the differential equation of vertical load transfer of single pile, and considering nonlinear softening of side resistance force, the expression in increment form was deduced which concerned relation between axial force of pile and displacement of pile relative to soil of pile side. Then according to the expression and method for harmony of displacement, relation curve between load and settlement was figured out. The result was proved to be appropriate by compared the computing result with the test one, and could explain progressive failure of pile bearing vertical load.

关 键 词：侧阻力 非线性软化 传递函数 位移协调法 渐进破坏 

分 类 号：TU473.1[建筑科学—结构工程]