基于MATLAB的三维轴对称基桩动力特性分析  

Dynamic Properties of Pile in Axis-Symmetry Model Based on MATLAB

作　　者：王杰光[1] 刘宝臣[1,2] 蒙剑平[1] 

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]中国地质大学(武汉)工程学院,武汉430074

出　　处：《桂林理工大学学报》2011年第2期221-224,共4页Journal of Guilin University of Technology

基　　金：广西自然科学基金项目(桂科自0728220);广西建筑工程检测与试验重点实验室项目(桂科能07109005-05);广西研究生教育创新计划项目(2010105960818M23)

摘　　要：利用MATLAB对三维轴对称基桩的振动特性进行了研究,并与相应的理论结果进行了对比。对桩侧土抗剪刚度的分布对桩振动频率的影响进行了计算分析,结果表明:桩侧土抗剪刚度系数的分布对桩振动固有频率的影响较小,因此由桩振动的固有频率反算桩侧土的总抗剪刚度更具优越性;给出了由第一、二阶固有频率反算求出土体对桩底的抗压刚度和土体对桩侧的剪切刚度的迭代计算方法,用以计算桩的承载力。算例表明,采用该方法计算得出的桩承载力与其他方法计算结果相近。Dynamic properties of pile in axis-symmetry model are analyzed with MATLAB, and compared with corresponding theory. Influence by distribution of soil-pile shear stiffness is calculated and analyzed. It is indicated that the distribution of soil-pile shear stiffness has little influence on the eigenfrequencies of pile. Therefore it is good to calculate total soil-pile shear stiffness by inverse method with the eigenfrequency of pile. An alternation method is presented to calculate soil-pile press stiffness and soil-pile shear stiffness with the first and second eigenfrequency of pile, so pile capacity can be computed. Pile bearing capacity can be calculated with this and other method, and the results are almost the same.

关 键 词：三维轴对称模型 MATLAB 桩基动力特性 固有频率 桩-土刚度 

分 类 号：TU473.1[建筑科学—结构工程]