铁道科学与工程学报2017，Vol.14Issue(4)：730-738,9.
端承桩水平振动响应能量变分分析方法
Variation solution for horizontal dynamic response of an end-bearing pile
张慧 1李小娟 1屈青山1
作者信息
- 1. 黄淮学院 建筑工程学院,河南 驻马店463000
- 折叠
摘要
Abstract
The lateral dynamic response of an axial loaded pile in soil was investigated by an energy approach in this paper. Lagrange Equations of the pile-soil system bearing horizontal dynamic load were established based on the analytic dynamics. Complex variable function and extended variational principle were utilized to deduce the governing equations of the pile and soil. Expressions of soil displacements were obtained according to method of separation of variables. Lateral displacements, internal forces and complex impedances of the pile under horizontal vibration were derived based on the continuous conditions between the pile and soil and iterative program. Numerical examples were carried out to investigate the influence of axial load on horizontal dynamic response and shear modulus of soil and pile length on the distribution law of pile displacement. The results show that: the dynamic complex impedances decrease with the increase of axial loads; horizontal displacement and rotation angle decrease, when shear modulus of the surrounding soil decreases; the length of the coupled vibration of the pile-soil system shows little variation, when the pile length reaches the critical value.关键词
竖向荷载/水平振动/复阻抗/变分原理Key words
axial loads/lateral dynamics/complex impedance/variation principle分类
建筑与水利引用本文复制引用
张慧,李小娟,屈青山..端承桩水平振动响应能量变分分析方法[J].铁道科学与工程学报,2017,14(4):730-738,9.
