| 砂土中单桩水平循环累积变形特性模型试验 |
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| 引用本文： | 张勋,黄茂松,胡志平.砂土中单桩水平循环累积变形特性模型试验[J].岩土力学,2019,40(3):933-941. |
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| 作者姓名： | 张勋 黄茂松 胡志平 |
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| 作者单位： | 1. 长安大学 建筑工程学院，陕西 西安 710061；2. 同济大学 地下建筑与工程系，上海 200092 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)（No.2013CB036304）；中央高校基本科研业务费资助项目（No.310828171013） |
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| 摘 要： |
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| 关 键 词： | 单桩 砂土 水平循环加载 累积位移 预测模型 |
| 收稿时间： | 2017-10-17 |
Model tests on cumulative deformation characteristics of a single pile subjected to lateral cyclic loading in sand |
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| ZHANG Xun,HUANG Mao-song,HU Zhi-ping.Model tests on cumulative deformation characteristics of a single pile subjected to lateral cyclic loading in sand[J].Rock and Soil Mechanics,2019,40(3):933-941. |
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| Authors: | ZHANG Xun HUANG Mao-song HU Zhi-ping |
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| Institution: | 1. School of Civil Engineering, Chang’an University, Xi’an, Shaanxi 710061, China;
2. Department of Geotechnical Engineering, Tongji University, Shanghai, 200092, China |
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| Abstract: | Large-diameter single pile foundation is a typical foundation type for offshore wind turbines. Model tests of large-diameter single pile are conducted using a simple mechanical load rig designed in-house in sand. The cumulative deformation response of a single pile under long-term lateral cyclic loading is discussed. The test results indicate that the cumulative displacement of the pile head presents two phase characteristics with number of cycles, and the short-term effect for lateral cyclic loading is greater than the long-term effect. Sand density and cyclic loading paths greatly influence the displacement characteristics of the pile head. The lateral secant stiffness of the pile head increases with cycling under different initial conditions. The change of horizontal static bearing capacity of single pile after cyclic loading in sands of different densities is not completely consistent with hard-soft mechanism for loose-dense sand subjected to shear. The prediction model parameters for lateral cyclic cumulative displacement of single pile are obtained by use of the empirical formula method. Comparison between the calculation results and the test results show that this model can effectively predict the cumulative displacement of single pile under different cyclic paths. |
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| Keywords: | single pile sand lateral cyclic loading cumulative displacement prediction model |
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