桩的侧向变形和竖向荷载的耦合分析  

Coupled Analysis of Lateral Displacement and Vertical Loading of Piles

作　　者：魏焕卫[1,2] 崔冠科[1] 宋菲 

机构地区：[1]山东建筑大学工程鉴定加固研究所,济南250014 [2]同济大学地下建筑与工程系,上海200092 [3]济南市人防建筑设计研究院,济南250014

出　　处：《结构工程师》2010年第2期137-141,共5页Structural Engineers

摘　　要：就工业厂房的桩基在地面超载情况下竖向荷载对桩身侧向变形的影响进行分析,并提出耦合分析的计算方法,着重分析桩顶荷载和桩侧摩阻力对侧向变形的影响。推导了考虑耦合作用的有限元方程,根据此方程编制了有限元计算程序。耦合计算分析结果表明,桩顶荷载和桩身摩阻力的分布对桩身的侧向变形和桩截面的内力几乎没有什么影响,但桩顶荷载的偏心距对桩顶位移产生较大影响,且与桩顶位移基本上成线性关系。指出由于桩顶荷载和桩身摩阻力作用方向与桩身侧向变形初始方向垂直,根据正交法则二者之间的矢量积为零。因此,在桩基侧向受力和变形计算中可以不考虑桩顶荷载的影响。The interaction of lateral displacement and vertical loading of piles under surface excessive load in a industry building was analyszed.The effect of some factors,especially pile top loading and lateral friction of pile,were discussed.The finite element formula was deduced and the corresponding calculation program was developed.The calculation results show that pile loading and lateral friction of the pile have hardly effect on the lateral displacement,but the effect of eccentric distance of the pile loading is obvious to the lateral displacement on the top of the pile,meanwhile,the relationship between the lateral displacement on the top of the pile and eccentric distance of the pile is linear.

关 键 词：耦合作用 侧向变形 有限元 桩顶荷载 桩侧阻力 

分 类 号：TU472.1[建筑科学—结构工程]