桩帽平面问题的研究

作者：刘亚平

单位： 天津港湾工程研究所

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出版年,卷(期):页码：1992,16(4):47-56

摘要：

本文首先根据桩帽的三维有限元内力计算结果,提出了将桩帽简化成平面问题的可能性,通过用二维有限元对不同简化模型的计算,选择了一种较为合理的简化模型,用该模型对桩帽不同的横梁搁置长度、不同的荷载分布进行了计算,以比较横梁的搁置长度及荷载分布对桩帽内力的影响。本文还进行了6个不同高宽比的平面桩帽的试验研究,分析了高宽比对正截面开裂、斜截面开裂及破坏荷载和破坏形态的影响。

Based on the calculated results of the internal force of three-dimensional finite elements in a pile cap, the possibility to reduce a pile cap to a plane problem is presented in the paper. A more rational simplified-model is selected after various simplified models were calculated by using the two dimensional finite element method. By using the simplified model, different placement lengths of cross girders on a pile cap and different load distributions on the pile cap is calculated to establish the effect of the placement length of girders and the load distribution upon the pile cap. Described also in the paper are the tests carried out on the plane surfaced pile caps with 66 different height-width ratios in order to analyze the effect of a height-width ratios upon cracking in normal sections, cracking in obique sections, failure loads and patterns of failure.

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