Time History Method of Three-Dimensional Dynamic Stability Analysis for High Earth-Rockfill Dam and Its Application

Sustainability

Junchi Liu¹  Degao Zou²  Han Yuan³  Minghao Li³  Yuke Wang³  Xiang Yu³ 

[1] CCCC Investment Nanjing Co., Ltd., Nanjing 211899, China;Faculty of Infrastructure Engineering, School of Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China;School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China;

关键词: numerical methods;    seismic stability;    sliding surface;    local safety;    spatial position;   

DOI  :  10.3390/su14116671

来源: DOAJ

【 摘 要 】

Accurately grasping the stability characteristics of high earth-rockfill dam slopes is the key to the seismic safety evaluation of dams. In this research, the development and application of the common methods for slope stability analysis are reviewed firstly. Then, a three-dimensional dynamic time history stability analysis method is presented, and corresponding software is developed based on the sliding surface finite element stress method combined with the three-dimensional finite element dynamic response. This method makes the three-dimensional dynamic stability analysis efficient, and the effectiveness of this software is verified. Finally, the two-dimensional (2D) and three-dimensional (3D) dynamic stability analyses of a high concrete face dam are carried out, and the stability of the dam’s downstream slope under seismic load is studied. The results indicate that there are many differences between the results of the traditional 2D and 3D stability analyses. The time history of the safety factor, local safety behavior, overall shape and spatial position of the potential sliding body, and even the sliding process of failure can be captured with 3D stability analysis.

【 授权许可】

Unknown