| 群桩扭转非线性模型 |
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| 引用本文： | 孔令刚,张利民.群桩扭转非线性模型[J].岩土力学,2009,30(8):2231-2236. |
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| 作者姓名： | 孔令刚 张利民 |
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| 作者单位： | 1. 浙江大学,软弱土与环境土工教育部重点实验室,杭州,310027
2. 香港科技大学,土木工程系,香港 |
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| 基金项目： | 香港RGC项目，国家自然科学基金面上项目 |
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| 摘 要： | 建立了一个非线性数学模型来分析群桩扭转问题.该模型利用非线性荷载传递曲线来模拟桩的非线性响应,采用Mindlin解计算各桩水平力间的相互作用,用Randolph解析解分析得到各桩间扭矩对水平力的影响.在各单桩中引入经验性的耦合系数,分析桩身水平变形引起的土体反力对该桩扭转承载力的影响.对比计算结果与离心机模型试验数据,表明该模型能够模拟群桩扭转中主要的桩-土-桩相互作用和荷载耦合作用,较好地反映了实际情况.
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| 关 键 词： | 桩群 扭转 非线性模型 桩-土-桩相互作用 离心机试验 |
| 收稿时间： | 2007-12-11 |
Nonlinear analysis of pile groups subjected to torsion |
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| KONG Ling-gang,ZHANG Li-min.Nonlinear analysis of pile groups subjected to torsion[J].Rock and Soil Mechanics,2009,30(8):2231-2236. |
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| Authors: | KONG Ling-gang ZHANG Li-min |
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| Institution: | 1. Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, Zhejiang University, Hangzhou 310058, China; 2. Department of Civil Engineering, Hong Kong University of Science and Technology, Hong Kong, China |
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| Abstract: | A method is presented to analyze the nonlinear behavior of pile groups under torsion. In this method, the lateral and torsional responses of individual piles in a pile group are modeled by load transfer curves; the far-field interactions among the individual piles in the groups are predicted using classical elastic solutions; and the coupling effect of lateral resistance on torsional resistance of the individual piles is quantified using an empirical factor. The proposed approach is capable of capturing major pile-soil-pile interactions and the coupling effect in pile groups subjected to torsion. It is verified using results of centrifuge model tests. |
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| Keywords: | pile group torsional response nonlinear analysis pile-soil-pile interaction centrifuge tests |
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