当前位置: X-MOL 学术Acta Geotech. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Transversely isotropic frost heave modeling with heat–moisture–deformation coupling
Acta Geotechnica ( IF 5.7 ) Pub Date : 2019-03-08 , DOI: 10.1007/s11440-019-00774-1
Quanhong Liu , Zhengzhong Wang , Zhanchao Li , Yi Wang

The transversely isotropic (TISO) constitutive and frost heave models for the freezing of fine-grained soils are more accurate than the isotropic model and simpler than the orthotropic models. First, in combination with the mesoscopic composition of freezing soils, a mechanical model for the interaction between the equivalent ice lens and the soil in frozen soils is established based on the series and parallel models in the theory of composite mechanics. Second, the TISO constitutive model together with the analytic expression of five elastic constants is provided for analysis of the freezing soils. Third, a preliminary elastoplastic model for TISO freezing soil is established based on the Hill plastic model. Fourth, the heat–moisture–deformation coupling TISO model and the hydrodynamic frost heave model are derived according to a thermodynamics equation, a soil water motion equation, and generalized Hooke’s law. Synchronization and uniformity of the TISO constitutive model and the TISO frost heave model are realized for analyzing the interaction between permafrost soils and buildings. Finally, an indoor standard frost heave test and the frost heave of a prototype canal are simulated based on the above models. The numerical results indicated that the models presented in this paper accurately described the frost heave and revealed the interaction between permafrost and buildings.

中文翻译:

湿热变形耦合的横观各向同性冻胀模拟

用于冻结细粒土壤的横向各向同性(TISO)本构模型和冻胀模型比各向同性模型更精确,并且比正交异性模型更简单。首先,结合冻土的介观成分,基于复合力学理论中的串联和并联模型,建立了等效冰晶透镜与冻土中土相互作用的力学模型。其次,提供了TISO本构模型以及五个弹性常数的解析表达式,用于分析冻土。第三,基于Hill塑性模型,建立了TISO冻土的初步弹塑性模型。第四,根据热力学方程,土壤水分运动方程和广义的胡克定律推导了热湿变形耦合TISO模型和水动力冻胀模型。为了分析多年冻土与建筑物之间的相互作用,实现了TISO本构模型和TISO冻胀模型的同步和统一。最后,基于上述模型,模拟了室内标准冻胀试验和原型运河的冻胀试验。数值结果表明,本文提出的模型能够准确地描述冻胀的变化,揭示了多年冻土与建筑物之间的相互作用。为了分析多年冻土与建筑物之间的相互作用,实现了TISO本构模型和TISO冻胀模型的同步和统一。最后,基于上述模型,模拟了室内标准冻胀试验和原型运河的冻胀试验。数值结果表明,本文提出的模型能够准确地描述冻胀的变化,揭示了多年冻土与建筑物之间的相互作用。为了分析多年冻土与建筑物之间的相互作用,实现了TISO本构模型和TISO冻胀模型的同步和统一。最后,基于上述模型,模拟了室内标准冻胀试验和原型运河的冻胀试验。数值结果表明,本文提出的模型能够准确地描述冻胀的变化,揭示了多年冻土与建筑物之间的相互作用。
更新日期:2019-03-08
down
wechat
bug