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| CRITERION OF GLOBAL STABILITY OF HIGH ARCH DAM STRUCTURES BASED ON MODEL TEST AND EDFORMATION REINFORCEMENT THEORY |
| CHENG Li，LIU Yaoru，PAN Yuanwei，YANG Qiang，ZHOU Weiyuan |
| (State Key Laboratory of Hydroscience and Hydraulic Engineering，Tsinghua University，Beijing 100084，China) |
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Abstract During the entire failure process，high arch dam as a statically indeterminate rock structure breaks locally at first；then the whole system enters the nonlinear deformation stage；and finally the overall structure failure happens. Consequently，it is difficult to evaluate the global stability of a high arch dam using a single criterion. In this paper，the entire failure process was analysed adopting the overload method to study the stability of high arch dams. Meanwhile，3 safety factors(K1，K2，K3) based on the geological model test and the norm criterion of the curve of plastic complementary energy were discussed and compared. 3 safety factors(K–1，K–2，K–3) to simulate the failure process were proposed in this paper by using the theory of deformation reinforcement. The relationships between K1，K2，K3 and K–1，K–2，K–3 were discussed through analysing the results of model tests and the numerical computations completed in recent years. Results indicate that high consistency exists between two criteria and two criteria can validate each other.
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Received: 26 June 2014
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2014, Vol. 33 
