纵横向荷载作用下桩的工作性状研究  

Behavior of pile under combined axial and lateral loading

作　　者：皇甫明[1] 王幼青[2] 张军[2] 

机构地区：[1]北方交通大学土木工程学院,北京100044 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《哈尔滨工业大学学报》2003年第6期743-746,共4页Journal of Harbin Institute of Technology

摘　　要：为了了解承受纵向荷载和横向荷载共同作用的桩的工作性能 ,通过一系列模型桩试验 ,分析了水平荷载对竖向承载桩的桩顶沉降变形的影响 ,以及竖向荷载对横向承载桩的桩顶水平位移和桩身弯矩的影响 .此外 ,运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 ,以及在桩与土界面处设置接触面单元来考虑桩与土的滑移变形和开裂 ,对模型桩进行了模拟计算分析 .试验及模拟分析均表明 ,竖向荷载对水平承载桩的影响较小 ,而水平荷载对竖向承载桩的影响是显著的 .In order to study the behavior of a single pile under combined axial and lateral loading, a series of model tests were made to investigate the effects of lateral loading on axial pile top displacements and the influence of axial loads on the lateral pile top deflections and bending moment, and the response of a single pile was analysed using the three-dimensional finite element analysis with nonlinear soil behavior (Drucker-Prager model) and pile-soil contact elements representing slippage and pile-soil separation. Both tests and simulating analysis show that the effects of axial loading on the lateral bearing characteristics of pile are small and the influence of lateral loads on the axial pile is remarkable.

关 键 词：桩基 工作性状 水平载荷 竖向载荷 试验模型 沉降变形 水平位移 弯矩 接触面单元 DRUCKER-PRAGER模型 

分 类 号：TU473.1[建筑科学—结构工程]