| 岩石损伤软化统计本构模型 |
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| 引用本文： | 王军保,刘新荣,李鹏.岩石损伤软化统计本构模型[J].兰州大学学报(自然科学版),2011(3). |
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| 作者姓名： | 王军保 刘新荣 李鹏 |
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| 作者单位： | 重庆大学土木工程学院;重庆大学山地城镇建设与新技术教育部重点实验室; |
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| 基金项目： | 国家自然科学基金创新群体基金项目(50621403); 重庆大学研究生科技创新基金项目(中央高校基本科研业务费NO.CDJXS10200002资助) |
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| 摘 要： | 假定岩石微元强度服从Weibull分布,Hoek-Brown强度准则作为岩石微元统计分布变量,利用等效应变假说,经过严格的数学推导,得到了岩石在三维应力作用下的损伤统计本构模型,并用试验资料对模型进行了验证.验证结果表明:模型理论曲线和试验曲线具有较高的吻合度,能够比较好地反映应变软化型岩石的应力—应变关系和破坏的全过程.从而证明了该模型的合理性和可行性,具有广泛的应用前景.
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| 关 键 词： | 损伤 Weibull分布 Hoek-Brown准则 本构模型 |
Statistical damage softening constitutive model for rock |
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| WANG Jun-bao,LIU Xin-rong .College of Civil Engineering,Chongqing University,Chongqing ,China .Key Laboratory of New Technology for Construction of Cities in Mountain Area with the Ministry of Education,Lanzhou ,China.Statistical damage softening constitutive model for rock[J].Journal of Lanzhou University(Natural Science),2011(3). |
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| Authors: | WANG Jun-bao LIU Xin-rong College of Civil Engineering Chongqing University Chongqing China Key Laboratory of New Technology for Construction of Cities in Mountain Area with the Ministry of Education Lanzhou China |
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| Institution: | WANG Jun-bao~(1,2),LIU Xin-rong~(1,LI Peng~(1,2) 1.College of Civil Engineering,Chongqing University,Chongqing 400045,China 2.Key Laboratory of New Technology for Construction of Cities in Mountain Area with the Ministry of Education,Lanzhou 730000,China |
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| Abstract: | Taking the Hoek-Brown damage criterion as the distribution variable and making use of the strain-equivalence hypothesis,a rock softening and damage constitutive model was established under the triaxial stress state based on the strength characteristics of rock micro-unit with the Weibull distribution.Then the constitutive model was verified by test data from the triaxial experiment and the result indicates that the proposed constitutive model can accurately reflect the relationship between stress and strain... |
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| Keywords: | damage Weibull distribution Hoek-Brown criterion constitutive model |
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