竖向载荷作用下单桩接触面性能分析  

Performance analysis of single pile-soil interface under vertical load

作　　者：钱晓丽[1] 陶龙光[2] 刘波[2] 

机构地区：[1]黑龙江科技学院建筑工程学院,黑龙江哈尔滨150027 [2]中国矿业大学力学与建筑工程学院,北京100083

出　　处：《辽宁工程技术大学学报（自然科学版）》2007年第1期59-61,共3页Journal of Liaoning Technical University (Natural Science)

基　　金：黑龙江省教育厅科技基金资助项目(10551272)

摘　　要：在桩与土界面处设置Goodman接触单元来模拟桩与土的滑移变形和开裂,建立了单桩在竖向载荷作用下接触面应力和位移的关系公式。用三维有限元的方法,考虑了土体的非线性(Drucker-Prager模型)力学性能,对模型桩进行了模拟计算分析,详细讨论了双曲线接触面本构关系的初始切向、法向刚度对桩顶位移及地表沉降的影响。对理论分析桩的载荷沉降提供了一种有益的参考。Goodman contact element is proposed for pile-soil interface to represent slippage and pile-soil separation, which can be used to determine the relationship between stress and strain of pile under vertical load. The response of a single pile is analyzed using three-dimensional finite element analysis with the consideration of soil nonlinear behavior （Drucker-Prager model）. A hyperbolic constitutive model of interface is put forward and the influence of initial tangent and normal stiffness on the settlement of pile and surface is discussed, which can provide a valuable reference to the theoretical analysis of load-induced pile settlement.

关 键 词：Goodman 接触面单元 非线性 切向刚度 法向刚度 

分 类 号：TU473.1[建筑科学—结构工程]