Application of UH model considering temperature to finite element method

The UH model considering temperature proposed by Yao Yangping et al. can describe the influence law of temperature on the stress and strain characteristics of normal consolidated soil and over-consolidated soil. The parameters of this model are simple, which make the model be applied to the engineering easily. Firstly, based on the UH model considering temperature, the asymmetric elastic-plastic matrix of this model is transformed into a symmetric matrix, and the expression for the thermal strain increment of this model is deduced again. Then the semi-implicit return mapping method is adopted to update the stress, and the finite element program of this model is compiled. Thus the application of UH model considering temperature to finite element method is realized. The finite element simulation of the triaxial tests is carried out using the finite element program of the UH model considering temperature. The stress-strain laws of soil under different temperatures are analyzed. The comparison between finite element and unit predicted results indicates that the finite element program of the UH model considering temperature is correct. It lays a foundation for the further analysis of geotechnique engineering problems under the influence of temperature. ©, 2015, Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering. All right reserved.