Assessment of thermal, hydraulic, and mechanical constitutive relations on the temperature-induced stress and pore fluid pressure in saturated clays
Assessment of thermal, hydraulic, and mechanical constitutive relations on the temperature-induced stress and pore fluid pressure in saturated clays
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饱和粘土中温度引起的应力和孔隙流体压力的热、水力和机械本构关系的评估
DOI：
10.1016/j.compgeo.2022.104686
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发表时间：
2022
影响因子：
5.3
通讯作者：
Ghasemi-Fare, Omid
中科院分区：
文献类型：
--
作者：
Tamizdoust, Mohammadreza Mir;Ghasemi-Fare, Omid
温度引起的孔隙水压力的产生和消散可以改变土介质的力学行为和特性。实验观察表明，加热/冷却循环改变土壤结构，这可能导致不可恢复的变形。以往的研究表明，热渗透（非达西）流在粘土中的贡献可能有显着的作用，在热加压扩散。因此，本研究的目的是调查的热，水力，和机械本构模型，如热塑性变形沿着与热渗透流和热渗透对THM响应的粘性土在加热和冷却阶段。据发现，考虑温度相关的参数结合热多孔弹塑性模型改善了结果，以更好地捕捉热加压，特别是在冷却阶段。此外，热弹性变形主要影响加热阶段的热加压，而热塑性变形（热固结）对加热器附近的应力特性起主要作用。热渗透传导率的大小和符号与温度和粘土的微结构性质密切相关，这一点不容忽视。通过对考虑和不考虑热渗流和热渗透的数值计算结果的比较，证实了热渗透现象在粘性土热负荷过程中的重要性。
Generation and dissipation of temperature-induced pore water pressure can alter the mechanical behavior and characteristics of soil media. Experimental observations indicate that heating/cooling cycles alter the soil fabric which may result in irrecoverable deformations. Previous studies suggest that the contribution of thermo-osmotic (non-Darcian) flow in clays may have a significant role in the thermal pressurization diffusion. Hence, this study aims to investigate the effects of thermal, hydraulic, and mechanical constitutive models such as thermo-plastic deformation along with the thermo-osmotic flow and thermal infiltration on the THM response of clayey soils during heating and cooling phases. It is found that considering temperature-dependent parameters in conjunction with the thermo-poroelastoplastic model improves the results to better capture the thermal pressurization, especially during the cooling phase. Moreover, thermo-elastic deformation majorly affects the thermal pressurization in the heating phase, and thermo-plastic deformation (thermal consolidation) has a major role in stress characteristics close to the heater. The magnitude and sign of thermo-osmotic conductivity strongly depend on the temperature and microstructural properties of clays which cannot be ignored. Comparison of the numerical results with and without considering thermo-osmotic flow and thermal infiltration, confirms the importance of the thermo-osmosis phenomenon during thermal loading in clayey soils.
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DOI：
--
发表时间：
1981
期刊：
影响因子：
--
作者：
Y. Dafalias
通讯作者：
Y. Dafalias
影响因子：
5.3
作者：
Davood Yazdani Cherati;Omid Ghasemi-Fare
通讯作者：
Davood Yazdani Cherati;Omid Ghasemi-Fare
影响因子：
5.3
作者：
Mohammadreza Mir Tamizdoust;Omid Ghasemi-Fare
通讯作者：
Mohammadreza Mir Tamizdoust;Omid Ghasemi-Fare
埋藏水平热源附近浅层地下土壤的长期热水力响应
DOI：
10.1016/j.ijheatmasstransfer.2021.122120
发表时间：
2022
影响因子：
5.2
作者：
Tamizdoust, Mohammadreza Mir;Ghasemi-Fare, Omid
通讯作者：
Ghasemi-Fare, Omid
影响因子：
7.4
作者：
M. Joshaghani;Omid Ghasemi-Fare
通讯作者：
M. Joshaghani;Omid Ghasemi-Fare