| 循环动载作用下改良土路基累积塑性变形的数值模拟与试验研究 |
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| 引用本文： | 邓天天,吴斌,周援衡.循环动载作用下改良土路基累积塑性变形的数值模拟与试验研究[J].铁道科学与工程学报,2010,7(1). |
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| 作者姓名： | 邓天天 吴斌 周援衡 |
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| 作者单位： | 中南大学土木建筑学院,湖南,长沙,410075 |
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| 基金项目： | 国家自然科学基金资助项目(50678177);;铁道部科技研究开发计划项目(2005K002-B-4) |
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| 摘 要： | 为了研究循环荷载作用下高速铁路花岗岩全风化物改良土路基的累积塑性变形特性,引入路基变形的弹塑性循环蠕变模型,进行了有限元分析并与现场试验实测值对比。研究结果表明:循环蠕变模型可以较好地模拟路基的累积塑性变形;在200万次的循环动载作用下,花岗岩全风化物改良土路基的累积塑性变形很小,所以,花岗岩全风化物经过改良以后可以用作高速铁路的路基填料,从而可以解决工程中常常遇到的弃方、借土、占地和生态、环保等方面的难题。
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| 关 键 词： | 循环动栽 累积塑性变形 循环蠕变模型 有限元分析 |
Numerical simulation and experimental research on accumulative plastic deformation of improved soil roadbed under cyclic dynamic loads |
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| DENG Tian-tian
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WU Bin
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ZHOU Yuan-heng.Numerical simulation and experimental research on accumulative plastic deformation of improved soil roadbed under cyclic dynamic loads[J].Journal of Railway Science and Engineering,2010,7(1). |
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| Authors: | DENG Tian-tian WU Bin ZHOU Yuan-heng |
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| Institution: | School of Civil & Architectural Engineering;Central South University;Changsha 410075;China |
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| Abstract: | In order to study the characteristics of accumulative plastic deformation of roadbed filled with completely weathered granite improved soil under cyclic loads,the elastic-plastic cyclic creep model of roadbed deformation was introduced,the results with the data of field test were analyzed and compared.The results show that the cyclic creep model can be used to simulate the accumulative plastic deformation of roadbed.The plastic deformation of roadbed filled with improved soil under 2 million times of the cy... |
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| Keywords: | cyclic loads accumulative plastic deformation cyclic creep model finite elements analysis |
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