Abstract：The existence of gas hydrate can significantly affect the stiffness, peak strength and dilatancy of gas hydrate-bearing soil (GHBS). Aiming at the deficiency of the existing models, a bounding surface model of GHBS was constructed. The presented model has fewer parameters and can precisely reflect the behavior of GHBS. The key of calculating the deformation of GHBS lies in the correct integration of constitutive equations. Using the fully implicit back Euler algorithm, the integration algorithm of bounding surface model and the consistent tangent matrix are derived. Based on the redevelopment interface provided by ABAQUS software, the user material subroutine of the model is written, and the correctness of the program is verified. Finally, a series of plane strain tests of GHBS are simulated by using the developed subroutine, and the effect of hydrate saturation on shear band inclination and void ratio is analyzed.
王 兴 孔 亮 袁庆盟 林星宇. 能源土边界面模型的应力更新算法及算例分析[J]. 土木工程学报, 2019, 52(S2): 155-161.
Wang Xing Kong Liang Yuan Qingmeng Lin Xingyu. The stress update algorithm of bounding surface model on gas hydrate-bearing#br#
soil and case study. 土木工程学报, 2019, 52(S2): 155-161.
