自重对单桩竖向抗压刚度的影响  

Gravity influence on vertical compressive stiffness of single pile

作　　者：郭哲 张武 Guo Zhe;Zhang Wu(China Academy of Building Research,Beijing 100013,China)

机构地区：[1]中国建筑科学研究院有限公司,北京100013

出　　处：《建筑科学》2023年第3期92-97,共6页Building Science

摘　　要：本文以荷载传递法和剪切位移法为基础,推导了自重条件下桩顶荷载与沉降的关系,分析了重力对单桩竖向抗压刚度的影响,认为重力作用下单桩竖向抗压刚度与桩侧土模量、桩身材料模量、泊松比等因素有关。与静载试验数据对比,考虑自重的单桩竖向抗压刚度与实测值更为接近。采用有限单元法模拟了实际工况,数值计算与理论推导具有一致性。Based on the load transfer method and shear displacement method,the relationship between load and settlement on the pile top under gravity is derived,and the gravity influence on vertical compressive stiffness of single pile is analyzed.The vertical compressive stiffness of single pile under gravity is related to factors such as soil modulus,pile material modulus and Poisson’s ratio,etc.Compared with the static load test data,the vertical compressive stiffness of single pile considering gravity is closer to the measured value.The actual working conditions are simulated by finite element method,of which the numerical result is consistent with the theoretical.

关 键 词：桩身自重 单桩竖向抗压刚度 荷载传递法 剪切位移法 有限单元法 

分 类 号：TU473[建筑科学—结构工程]