MA Huaifa1, 2, YANG Ru2
1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
2. Earthquake Engineering Research Center, China Institute of Water Resources and Hydropower Research, Beijing 100048, China
Abstract: Aiming at the low frequency vibration problems in engineering, regardless of fluid acceleration, the viscous-spring artificial boundary and flux boundary conditions infinite of 3D saturated ground are derived based on the spherical wave equation. Afterwards, the principle of virtual displacements of 3D viscous-spring artificial boundary of infinite saturated foundation is proposed. Then the script files are written according to the finite element language, and based on the Finite Element Program Generator (FEPG), the program source codes were generated. By means of the impact load and sudden load numerical analysis exacted on infinite ground surface, the correctness of the established equations and procedures were verified. This method can be applied to the numerical simulation of 3D saturated soil dynamic consolidation.
Key words: infinite saturated foundation; 3D viscous-spring artificial boundary; virtual displacement principle; pore water pressure; effective stress
Published in: Journal of China Institute of Water Resources and Hydropower Research Vol. 13 No.2, April, 2015