基于数值模拟的抗拔桩力学性能研究
Research on Mechanical Properties of Anti-pulling Piles based on Numerical Simulation
刘晓丹 1陶思源 1刘苏 1王玉祥 1朱学敏 2马露2
作者信息
- 1. 安徽水利开发有限公司,安徽蚌埠 233000
- 2. 安徽科技学院建筑学院,安徽蚌埠 233000
- 折叠
摘要
基于FLAC3D有限元软件,分别对普通抗拔桩和托底抗拔桩进行数值模拟,对比研究两者的荷载-位移规律,主要分析桩体弹性模量和侧摩阻力折减系数的影响.研究结果表明:桩体弹性模量越大,抗拔桩桩顶位移量越小,但弹性模量不会影响抗拔桩的极限承载力;托底抗拔桩和普通抗拔桩的荷载-位移曲线相似,但托底抗拔桩会显著降低桩顶位移,差异在于两者的荷载传递方式;抗拔桩的荷载作用存在一个区间,为极限承载力的14％～82％,此区间内托底抗拔桩相比普通抗拔桩桩顶位移减少比例基本不变.
Abstract
Based on FLAC3D finite element software,the numerical simulation of the ordinary anti-pulling pile and the underfoot anti-pulling pile were carried out respectively,and the load-displacement rules of the two were compared,and the influence of pile elastic modulus and side friction reduction coefficient was mainly analyzed.The results showed that the lar-ger the elastic modulus of the pile was,the smaller the displacement of the top of the uplift pile was,but the elastic modulus did not affect the ultimate bearing capacity of the anti-pulling pile.The load-displacement curves of ordinary anti-pulling piles were similar to those of ordinary anti-pulling piles,but the top displacement of pile could be significantly reduced by underpinning and anti-pulling piles.The difference lied in their load transfer modes.There was a range of load action of anti-pulling piles,which was 14％～82％of the ultimate bearing capacity.In this range,the displacement reduction ratios of un-derpinning and anti-pulling piles were basically the same as those of ordinary anti-pulling piles.
关键词
托底抗拔桩/普通抗拔桩/荷载-位移曲线/折减系数/桩侧摩阻力/数值模拟Key words
underpinning and anti-pulling piles/ordinary anti-pulling piles/load-displacement curve/reduction coeffi-cient/pile side friction/numerical simulation引用本文复制引用
基金项目
安徽省教育厅高等学校自然科学研究重大项目(2023AH040274)
安徽水利开发有限公司科研项目(KY2022-C55)
安徽省高等学校优秀拔尖人才培育项目(gxyq2022052)
出版年
2024
NETL
NSTL
万方数据