饱和土体固结压缩和蠕变的热力学本构理论及模型分析

陈志辉; 程晓辉

doi:10.11779/CJGE201403012

饱和土体固结压缩和蠕变的热力学本构理论及模型分析 English Version

清华大学土木工程系,北京 100084

基金项目: 清华大学-剑桥大学-麻省理工学院低碳能源大学联盟（LCEUA）种子基金项目（2010LC002）

详细信息

作者简介:
陈志辉(1986- )，男，四川金堂人，硕士研究生。E-mail: chenzh_luckdog@163.com。

中图分类号: TU43
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出版历程
- 收稿日期: 2013-07-18
- 发布日期: 2014-03-19

Thermodynamic constitutive theory and analysis of consolidation compression and creep of saturated soils

Department of Civil Engineering, Tsinghua University, Beijing 100084, China

摘要

摘要: 岩土热力学模型（thermodynamic soil model,TSM）是基于颗粒固体的非平衡态热力学理论,建立的一种崭新的描述岩土力学问题的统一理论模型。该模型引入“颗粒熵运动”和“弹性弛豫”,对土体颗粒层次的耗散机制进行了合理地考虑,这些使得模型能够更深入描述土体的变形和能量耗散机理,从而能够在统一理论框架中描述岩土体复杂多变的物理力学行为。基于该理论模型,研究了饱和土体的固结压缩和蠕变问题,分析了加载速率、应力/应变路径和非单调荷载等因素的影响规律。模拟结果表明：模型具有描述复杂条件下的饱和土体的固结压缩和蠕变特性的能力,具有较高的理论和工程应用价值。
- 固结压缩 /
- 蠕变 /
- 弹性弛豫 /
- 颗粒熵运动 /
- 颗粒固体非平衡态热力学 /
- 热力学本构关系
Abstract: The thermodynamic soil model (TSM) is a new unified theoretical model for the analysis of geotechnical engineering problems. It is based on the non-equilibrium thermodynamic theory of granular solids. The granular entropy and the elastic relaxation are introduced for describing the energy dissipation mechanism on particle level, which allows the model to simulate the various physical properties of the soils, including the overall deformation and the energy dissipation. Based on the TSM, the influence of strain rates, stress/strain paths and non-monotonic loads on the consolidation and creep behaviors of saturated soils are studied in the paper. The results show that the theoretical model is able to describe the consolidation and creep of saturated soils under complex conditions, and it is of high theoretical reference value for geotechnical engineering field.
- consolidation compression /
- creep /
- elastic relaxation /
- granular entropy movement /
- granular solid non-equilibrium thermodynamic theory /
- thermodynamic constitutive theory

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参考文献(33)

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