| 基于非线性强度准则的城市固废本构模型 |
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| 引用本文： | 吕玺琳,黄茂松,王蓉.基于非线性强度准则的城市固废本构模型[J].同济大学学报(自然科学版),2015,43(9):1308-1312. |
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| 作者姓名： | 吕玺琳 黄茂松 王蓉 |
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| 作者单位： | 同济大学 岩土及地下工程教育部重点实验室，上海 200092；同济大学 土木工程学院，上海 200092,同济大学 岩土及地下工程教育部重点实验室，上海 200092；同济大学 土木工程学院，上海 200092,上海岩土工程勘察设计研究院有限公司，上海 200032 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目(2012CB719803)；上海市自然科学(13ZR1443800) |
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| 摘 要： | 考虑到城市固体废弃物(MSW)抗剪强度常具有非线性的特点,建立了一个基于幂函数形式的强度准则.并据此分析了该准则转换为线性Mohr-Coulomb准则时摩擦角的变化规律.结果表明,该准则能合理反映内摩擦角随围压增大而降低的特性.基于幂函数强度准则,采用增量硬化准则建立屈服函数,并通过构建合理的塑性势函数,建立了一个非相关联流动法则的固废弹塑性本构模型.通过对固废三轴固结排水试验结果模拟表明,所建立的本构模型不仅能合理模拟应力-应变关系,亦能正确反映其体变特性.
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| 关 键 词： | 城市固废 非线性强度 弹塑性 本构模型 |
| 收稿时间： | 2014/8/21 0:00:00 |
| 修稿时间： | 2015/5/19 0:00:00 |
A constitutive model for the municipal solid waste based on nonlinear strength criterion |
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| LV Xilin,HUANG Maosong and WANG Rong.A constitutive model for the municipal solid waste based on nonlinear strength criterion[J].Journal of Tongji University(Natural Science),2015,43(9):1308-1312. |
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| Authors: | LV Xilin HUANG Maosong and WANG Rong |
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| Institution: | Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;College of Civil Engineering, Tongji University, Shanghai 200092, China,Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;College of Civil Engineering, Tongji University, Shanghai 200092, China and Shanghai Geotechnical Investigations & Design Institute Co., Ltd., Shanghai 200032, China |
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| Abstract: | Considering the nonlinear characteristic of the shear strength of the municipal solid waste(MSW), a power function strength criterion was proposed. According to the proposed criterion, the friction angle corresponding to the linear Mohr Coulomb criterion was obtained, and it was shown to decrease with the increasing of the initial confining stress. By adopting the incremental hardening rule and suitable plastic potential function, a non associated elasto plasticity model was built. By predicting a series of consolidated drained triaxial tests of MSW, the proposed model was shown to be able to predict the stress strain relationships of MSW rightly and could give out reasonable volumetric strain. |
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| Keywords: | municipal solid waste nonlinear shear strength elasto plasticity constitutive model |
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