Numerical simulation of ATLAS in-situ test using a new two yield surface thermo-plastic constitutive model
محل انتشار: نهمین کنگره بین الملی مهندسی عمران
سال انتشار: 1391
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,388
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شناسه ملی سند علمی:
ICCE09_362
تاریخ نمایه سازی: 7 مهر 1391
چکیده مقاله:
In this research, an in-situ field experiment called ATLAS carried out by François et al. [1] is simulated by means of a Finite-Element program capable of conducting coupled Thermal-Hydro-Mechanical analysis. When a heat source is buried in the soil, the increase in the temperature causes excess pore water pressure. The behavior of the soil is also affected by the change in temperature. In this paper, using a new Thermoplastic constitutive model developed by Abuel-Naga et al. [2], the effects of a buried heat source in the soil is modeled, and the numerical results are compared with the experimental data obtained from ATLAS experiment. In addition, the effect of temperature on the volumetric thermal expansion coefficient and viscosity of water is considered, leading to more accurate results compared to the results of simulation with the original constitutive model assuming of temperature-independent volumetric thermal expansion coefficient and viscosity for water
کلیدواژه ها:
Numerical simulation ، ATLAS in-situ test ، Two yield surface thermo-plastic constitutive model ، Thermal expansion coefficient ، Viscosity
نویسندگان
Ali Pak
Professor, Sharif University of Technology, Tehran, Iran
Kioumars Afshari
M.Sc. Student, Sharif University of Technology, Tehran, Iran