The Numerical Study of Energy Piles Performance by Using of Thermo-Mechanical and Mechanical Constitutive Models

In recent years, several constitutive models have been proposed to predict soil behavior under thermomechanical loads. On the other hand, it is important to study the behavior of energy piles and their adjacent soils under thermomechanical loads and by using constitutive models in which soil behavior changes due to temperature changes are considered. In this study, a thermomechanical constitutive model was added to the Abaqus finite element software to be used to evaluate the performance of energy piles. Results obtained from numerical modeling of Triaxial test show that the code written for the given constitutive model is capable of predicting soil behavior under thermomechanical conditions. Also, the results obtained from the analysis of energy pile using mechanical constitutive models of Drucker-Prager, MCC and thermo-mechanical constitutive model Tourchi show that in the analysis of energy pile, although the choice of constitutive model has a significant impact on the results, but there is no difference between choosing a mechanical or thermomechanical constitutive model for the adjacent soil.