水平受荷桩非线性有限元分析  

Non-linear finite element analysis of laterally loaded pile

作　　者：乔友刚 吴先敏 

机构地区：[1]山东水利勘测设计院,山东济南250014

出　　处：《水运工程》2009年第4期38-42,共5页Port & Waterway Engineering

摘　　要：利用有限元分析软件PLAXIS对水平受荷桩进行了非线性有限元分析,并采用规范中的m法和NL法进行了计算。结果表明,3种方法计算的桩身位移与弯矩分布图形状相似,桩身位移与弯矩随桩顶水平力的增大而增加;水平力较小时,采用Plaxis计算出的桩身最大弯矩小于m法与NL法的计算结果,水平力较大时,桩上部范围内的土表现出较强的塑性状态,使桩身弯矩大于后两者的计算值。采用Plaxis可以很好地对水平受荷桩进行模拟,采用软件自带的Mohr-Coulomb模型可以很好地考虑桩周土的塑性,真实反映土的特性,且易于获取参数,可作为水平受荷桩分析的一种有力工具。A laterally loaded pile is analyzed using non-linear finite element method with software PLAXIS,and calculuted by the m method and NL method proposed in the design code.The results show that the pile deflection and bending moment are in the same shape,and increase with the horizontal force.The maximum bending moment obtained form PLAXIS is less than that calculated using the m method and NL method under lower horizontal force,while is greater under bigger ones for the plastic behavior of soil.The laterally loaded pile can be reasonably modeled using PLAXIS,and the soil behavior can be considered with the inherent Mohr-Coulomb model.It can be used as an effective tool for analyzing the laterally loaded pile because it is easy to obtain soil parameters.

关 键 词：M法 NL法 有限元 桩 

分 类 号：TU473.11[建筑科学—结构工程]