Physical modelling of sliding failure of concrete gravity dam under overloading condition
Hong-Hu Zhu,Jian-Hua Yin,Jian-Hua Dong,Lin Zhang
Abstract
Sliding within the dam foundation is one of the key failure modes of a gravity dam. A twodimensional (2-D) physical model test has been conducted to study the sliding failure of a concrete gravity dam under overloading conditions. This model dam was instrumented with strain rosettes, linear variable displacement transformers (LVDTs), and embedded fiber Bragg grating (FBG) sensing bars. The
surface and internal displacements of the dam structure and the strain distributions on the dam body were measured with high accuracy. The setup of the model with instrumentation is described and the monitoring data are presented and analyzed in this paper. The deformation process and failure mechanism of dam sliding within the rock foundation are investigated based on the test results. It is found that the horizontal displacements at the toe and heel indicate the dam stability condition. During overloading, the cracking zone in the foundation can be simplified as a triangle with gradually increased height and vertex angle.
Key Words
concrete gravity dam; rock foundation; overloading; physical model test; sliding failure; fiber Bragg grating (FBG).
Address
Hong-Hu Zhu: Dept. of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
Jian-Hua Yin: Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University,Chengdu, Sichuan, China Jian-Hua Dong and Lin Zhang: State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University,Chengdu, Sichuan, China
School of Water Resources and Hydropower Engineering, Sichuan University, Chengdu, Sichuan, China
PDF Viewer
Preview uses the same access rules as Full Text PDF (subscription, purchase, or open access).
