水平斜交—竖向组合荷载下斜桩承载机理数值分析
Numerical Analysis of Bearing Behavior of Inclined Piles Under Horizontal Oblique-vertical Combined Loads
朱宇龙 1曹卫平 1赵敏 2石玉斌1
作者信息
- 1. 西安建筑科技大学土木工程学院 西安 710055
- 2. 西安工业大学建筑工程学院 西安 710021
- 折叠
摘要
文中通过将不同角度、不同大小的水平斜交荷载与不同大小的下压荷载相互组合,模拟倾斜桩基础在三维空间的受力特征,分析了粉土地基中在水平斜交荷载和竖向荷载共同作用下15°斜桩的承载性能.结果表明:随着水平斜交荷载加载角的增大,斜桩桩顶水平位移减小、单桩水平极限承载力增大.斜交角度不大于90°时斜桩桩顶产生正向的竖向位移,随着竖向下压荷载增大,桩顶竖向位移及水平位移均增大,斜桩水平极限承载力减小;水平斜交荷载加载角大于90°时则相反.桩身弯矩My和扭矩几乎不受下压荷载的影响,水平加载角度越接近90°,其负向弯矩和正向扭矩峰值越大.
Abstract
By combining horizontal oblique loads of different angles and sizes with downward loads of different sizes,the mechanical characteristics of inclined pile foundation in three-dimensional space were simulated.The bearing capacity of 15°inclined piles in silty soil foundation under the combined action of horizontal oblique load and vertical load was analyzed.The results show that with the in-crease of the loading angle of horizontal oblique load,the horizontal displacement of the top of inclined pile decreases and the horizontal ultimate bearing capacity of single pile increases.When the skew an-gle is not more than 90°,the top of the inclined pile produces positive vertical displacement,which in-creases with the vertical downward load.The vertical displacement and horizontal displacement of pile top increase,and the horizontal ultimate bearing capacity of inclined piles decreases.The opposite is true when the loading angle of horizontal oblique load is greater than 90°.The bending moment and torque of the pile are almost unaffected by the downward load.The closer the horizontal loading angle is to 90°,the greater the peak value of the negative bending moment and the positive torque.
关键词
斜桩/数值模拟/斜交荷载/水平承载力/扭矩Key words
batter pile/numerical simulation/oblique load/horizontal bearing capacity/torque引用本文复制引用
出版年
2024
NETL
NSTL
万方数据