Ritz能量法分析约束位置对长桩稳定影响
Long Piles Stability Analysis upon Restricted Location by Ritz
较普通桩相比，长桩由于其桩身较长，桩径有限，柔度较大，需对其进行屈曲稳定性分析。然而，在以往的研究中，鲜见针对约束位置对长桩稳定影响的研究。传统Euler理论仅对桩端不同约束情况进行了分析，然而约束处于桩身任意位置时的影响则不得而知。本文运用力学理论，采用Ritz能量法，首先推导出了任意位置施加简支约束条件下的长桩轴压屈曲荷载计算公式，其次就公式与Euler理论进行了比较，一方面验证了所推公式的正确性，另一方面得出临界荷载值随着约束由桩底部向桩顶发展而呈线性增长的变化规律。本文的研究对桩基工程的施工具有一定的参考价值。
bstract: Compared with common piles, long piles stability need to be researched because of their length diameter and flexibility. However, restricted location is hardly taken into account in long piles stability. And Euler only analyzed consider different constraint conditions of pile top and end. In this paper, firstly, we deduced the formula which contains the factor of restricted location by method of Rayleigh-Ritz. Secondly, we compared the formula and Euler theory. On the one hand, we proved the right of the forma. On the other hand, we gained that critical load linear change by constrain position. All in all, our researches are valuable in pile engineering construction.
谢耀峰、殷晓明、徐双武、仲南艳
工程基础科学
能量法约束位置稳定性Ritz法
energy methodrestricted locationstabilitymethod of Rayleigh-Ritz
谢耀峰,殷晓明,徐双武,仲南艳.Ritz能量法分析约束位置对长桩稳定影响[EB/OL].(2008-11-11)[2025-08-24].http://www.paper.edu.cn/releasepaper/content/200811-285.点此复制
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