桥梁桩基的屈曲分析及试验

Buckling Analysis and Tests of Bridge Piles

基桩的同曲分析是一个相当复杂而又具有实际工程意义的课题。为适应我国各规范的规定,本文采用地基反力法理论,应用最小势能原理和变分导得了桩顶、桩端可能出现的各种边界条件下基桩屈曲问题的理论解。本研究所进行的室内模型桩屈曲破坏试验以及国外已有试验结果均表明,理论和实测吻合很好。此外,为便于实用,本文在大量数值分析的基础上,提供了一套简便而精度较高的实用计算公式和图表。

The analysis of pile buckling, is one of the widespread and complicated problems in foundation engineering.In order to gear with the current piling code, the subgrade-reaction theory is adopted and the principle of minumum potential energy and the calculus of variations have been applied to the theoretical analyses described herein, and various combinations of head and tip boundary conditions have been considered in the analysis. The calculated results agreed well with the measured values from the buckling tests of model piles carried out in this study and abroad.In addition,based on alarge amount of numerical analyses, regression formulas as well as charts have been worked out for practical use.