超长桩竖向承载性状影响因素的有限元分析  

FEM Analysis of the Influence Factors on the Characteristics of Vertically Loaded Over-length Single Pile

作　　者：罗滔 傅少君[2] 敖霞 

机构地区：[1]西京学院陕西省混凝土结构安全与耐久性重点实验室,陕西西安710123 [2]武汉大学土木建筑工程学院,湖北武汉430072 [3]江西省电力设计院,江西南昌330096

出　　处：《中国农村水利水电》2018年第1期135-139,共5页China Rural Water and Hydropower

基　　金：西京学院特区人才科研启动专项基金;贵州省科技计划项目(黔科合基础[2016]1154)

摘　　要：超长桩的竖向承载机理及其影响因素一直是工程中的热点研究问题。采用非线性有限元方法,通过数值分析手段分别模拟了不同桩长径比、桩土弹模比、桩端土与桩周土弹模比以及邻近堆载,以桩身轴力沿桩身分布规律为指标系统分析各种因素对超长桩竖向承载性状的影响,揭示超长桩的竖向荷载传递机理,为超长桩的设计和施工提供参考。The vertical bearing mechanism of over-length piles and its influence factors has been a hot research problem in engineering.Nonlinear finite element method is adopted to simulate the response of over-length pile under vertical load. Factors of different pile length to diameter ratio,different elastic modulus ratio of pile to soil,different elastic modulus ratio of soil under pile to soil adjacent pile and different magnitudes and distances of neighbor loads are considered. The effect of different factors on the vertical bearing mechanism of over-length pile is evaluated by the distribution of axial force along the pile body. The vertical load transfer mechanism of over-length pile is revealed,some useful conclusions are provided for the design and construction of over-length pile.

关 键 词：超长桩 承载机理 桩身轴力 堆载临近 非线性有限元 

分 类 号：TU473.1[建筑科学—结构工程]