考虑桩自重及侧摩阻力影响的超长桩屈曲分析

李传勋1; 刘晓钊1; 吴文兵2

doi:10.3969/j.issn.1671-7775.2016.06.017

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江苏大学学报（自然科学版） ›› 2016, Vol. 37 ›› Issue (6) : 719-723. DOI: 10.3969/j.issn.1671-7775.2016.06.017

论文

考虑桩自重及侧摩阻力影响的超长桩屈曲分析

作者信息 +

Buckling analysis for super-long pile considering self-weight of pile and lateral frictional resistance

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文章历史 +

摘要

同时考虑桩侧土抗力、桩侧摩阻力和桩身自重的影响,通过选择合适的桩身挠曲变形函数及桩侧土弹性抗力模式,基于最小势能原理,应用瑞利里兹法求解超长桩的临界荷载,给出了超长桩屈曲荷载和计算长度的解析表达，最后分析了桩侧土抗力、桩侧摩阻力和桩身自重对超长桩屈曲荷载和计算长度的影响.研究结果表明:桩侧土抗力是影响超长桩屈曲荷载的主要因素,而桩侧摩阻力对超长桩屈曲荷载的影响甚微.当桩身埋置率较低时,桩身自重对超长桩屈曲荷载的影响不容忽视,但是随着埋置率的增加,桩身自重对超长桩屈曲荷载的影响逐渐降低.

Abstract

Considering the effects of lateral resistance of soil, frictional resistance between pile and soil and self-weight of pile, and choosing proper deflection function of pile and elastic resistance model of lateral soil, the analytical solutions of buckling load and the calculation length of super-long pile were obtained by the method of Rayleigh-Ritz and the theory of minimum potential energy. The effects of lateral resistance of soil, frictional resistance between pile and soil and self-weight of pile on buckling load and calculation length of super-long pile were also analyzed. The results show that the buckling load of super-long pile is mainly influenced by lateral resistance of soil, while the frictional resistance between pile and soil has slight effect on buckling load of super-long pile. When the ratio of depth to length of pile is small, the influence of pile self-weight on buckling load should be considered. The influence of self-weight of pile is gradually decreased with the increasing of the ratio.

导出引用

李传勋1, 刘晓钊1, 吴文兵2. 考虑桩自重及侧摩阻力影响的超长桩屈曲分析[J]. 江苏大学学报（自然科学版）, 2016, 37(6): 719-723 https://doi.org/10.3969/j.issn.1671-7775.2016.06.017

LI Chuan-Xun-1, LIU Xiao-Zhao-1, WU Wen-Bing-2. Buckling analysis for super-long pile considering self-weight of pile and lateral frictional resistance[J]. Journal of Jiangsu University(Natural Science Edition), 2016, 37(6): 719-723 https://doi.org/10.3969/j.issn.1671-7775.2016.06.017

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