高承台桩基的动力屈曲分析  

Dynamic bucking analysis of pile foundations with elevated caps

作　　者：熊辉[1] 陈国开[1] XIONG Hui;CHEN Guokai(Department of Civil Engineering, Hunan University, Changsha 410082, China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《铁道科学与工程学报》2017年第7期1376-1381,共6页Journal of Railway Science and Engineering

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET-13-190);湖南省科技计划资助项目(2013FJ4214)

摘　　要：为求取高承台桩基在动力作用下某节点的动力位移图并利用B-R准则判断高承台桩基的稳定性。提出一种将有限元模型应用于高承台桩基的动力屈曲分析的简化方法,将计算得到的结果与相应的基于伽辽金法理论建立的简化法高承台基桩的非线性动力屈曲问题的基本方程式,利用四阶Runge-Kutta法进行求解的结果进行对比,验证该简化有限元法的正确性及适用性。通过建立不同桩径、桩长及桩的埋土深度的模型并进行分析对比。研究结果表明:该简化有限元法应用于高承台基桩的动力屈曲的分析具有一定的可行性及实用性,为高承台桩基的动力屈曲分析提供了一种新的方法途径。In order to obtain the dynamic displacement diagram of a node under the dynamic Bucking Analysis of Pile Fountdations with Elevated Capsand use the B-R criterion to judge the stability of the pile foundation of the high bearing platform.This paper presents a simplified method to apply the finite element model to the dynamic buckling analysis of the pile foundation with high bearing platform.The basic equations of the nonlinear dynamic buckling problem of the high pile foundation pile based on the Galerkin method are established.The results of the fourth-order Runge-Kutta method are used to verify the correctness and applicability of the simplified finite element method.The model of pile foundation with different pile diameter,pile length and pile is established and analyzed.The results show that the simplified finite element method has a certain feasibility and practicability for the dynamic buckling analysis of high pile foundation pile.Which provides a new method for the dynamic buckling analysis of the pile foundation.

关 键 词：高承台桩基 伽辽金法 简化有限元法 B-R准则 动力屈曲 

分 类 号：TU473[建筑科学—结构工程]