| 考虑颗粒破碎影响的粗粒土本构关系 |
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| 引用本文： | 申存科,迟世春,贾宇峰.考虑颗粒破碎影响的粗粒土本构关系[J].岩土力学,2010,31(7):2111-2115. |
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| 作者姓名： | 申存科 迟世春 贾宇峰 |
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| 作者单位： | 大连理工大学 海岸与近海工程国家重点实验室，大连 116024 |
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| 摘 要： | 粗粒土在较大的应力条件下容易产生颗粒破碎现象，而现有的大多数模型都没有考虑剪切过程中的颗粒破碎。模型将塑性功引入土体受力变形过程的能量方程中，推导得到土体流动法则。采用直线型屈服轨迹和非相关联流动法则，利用不排水应力路径计算得到硬化函数，建立了一个考虑颗粒破碎的粗粒土本构模型。对比分析表明：该模型对粗粒土在各种围压下的应力-应变和体应变计算结果与试验曲线吻合较好。
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| 关 键 词： | 粗粒土 颗粒破碎耗能 非相关联流动 塑性功 |
| 收稿时间： | 2009-04-21 |
A constitutive model for coarse granular soil incorporating particle breakage |
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| SHEN Cun-ke,CHI Shi-chun,JIA Yu-feng.A constitutive model for coarse granular soil incorporating particle breakage[J].Rock and Soil Mechanics,2010,31(7):2111-2115. |
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| Authors: | SHEN Cun-ke CHI Shi-chun JIA Yu-feng |
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| Institution: | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | Coarse granular aggregates are subjected to breakage during excessive stress changes. Most of the available constitutive models do not consider particle breakage during shearing. In the current model, the energy equation during shear deformation has been developed incorporating the plastic work; and the plastic flow rule is deduced. Adopting linear type yield locus and non-associated flow and hardening function derived from an undrained stress path, a constitutive model for coarse granular soil incorporating particle breakage is set up. It is shown that the proposed model can realistically describe the strength and deformation characteristics of soils at every confining pressure. |
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| Keywords: | coarse granular energy consumption on particle breakage non-associated flow plastic work |
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