| PHC管桩荷载传递的试验研究和数值分析 |
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| 引用本文： | 律文田,王永和,冷伍明.PHC管桩荷载传递的试验研究和数值分析[J].岩土力学,2006,27(3):466-470. |
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| 作者姓名： | 律文田 王永和 冷伍明 |
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| 作者单位： | 中南大学,土木建筑学院,长沙,410075 |
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| 摘 要： | 通过在预应力高强混凝土管桩(PHC桩)的桩顶、桩端及桩周各主要土层的分界面埋设应变计的静荷载试验，研究了PHC管桩的荷载传递机理，分析了轴力和桩侧摩阻力的变化规律。并以工程中PHC管桩的竖向抗压静载试验为基础，运用有限单元法对软土地区的PHC管桩桩-土相互作用进行模拟，在分析中采用弹塑性模型，引入了非线性接触面单元，并且考虑了土体的材料非线性。分析结果表明，计算值和实测值有一定的差别，但是变化趋势基本一致。
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| 关 键 词： | PHC管桩 有限单元法 荷载传递机理 桩侧摩阻力 |
| 文章编号： | 1000-7598-（2006）03-0466-05 |
| 收稿时间： | 2004-07-30 |
| 修稿时间： | 2004-11-01 |
Testing and numerical analysis of load transfer mechanism of PHC pile |
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| L Wen-tian,WANG Yong-he,LENG Wu-ming.Testing and numerical analysis of load transfer mechanism of PHC pile[J].Rock and Soil Mechanics,2006,27(3):466-470. |
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| Authors: | L Wen-tian WANG Yong-he LENG Wu-ming |
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| Institution: | School of Civil and Architectural Engineering, Central South University, Changsha 410075, China |
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| Abstract: | Base on the static loading tests on prestressed high-strength concrete piles with strain gauges at the top and toe of pile and at interfaces of soil layer,the load transfer mechanism of PHC piles was studied;and the behaviors of skin resistance and inner force were analyzed.Based on the static load test on prestressed high-strength concrete piles(PHC piles) of a practical engineering,using the elastoplastic model,nonlinear interface elements and nonlinear soil elements,by the finite element method,pile-soil interaction of PHC pile in the soft soil area were simulated.The results of analysis indicate that there are many differences between the numerical predictions and the experimental results;however,it shows that the calculated distribution trend is in good agreement with the experimental results. |
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| Keywords: | PHC piles finite element method load transfer mechanism skin resistance |
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