Water Science and Engineering 2012, 5(1) 105-119 DOI:   10.3882/j.issn.1674-2370.2012.01.010  ISSN: 1674-2370 CN: 32-1785/TV

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seismic stability
concrete gravity dam
penetrated crack
plastic-damage model
hard contact algorithm
Coloumb friction model
joint opening
Shou-yan JIANG
Cheng-bin DU
Article by Shou-yan JIANG
Article by Cheng-bin DU

Seismic stability analysis of concrete gravity dams with penetrated cracks

Shou-yan JIANG*, Cheng-bin DU

College of Mechanics and Materials, Hohai University, Nanjing 210098, P. R. China


The seismic stability of a cracked dam was examined in this study. Geometric nonlinearity and large deformations, as well as the contact condition at the crack site, were taken into consideration. The location of penetrated cracks was first identified using the concrete plastic-damage model based on the nonlinear finite element method (FEM). Then, the hard contact algorithm was used to simulate the crack interaction in the normal direction, and the Coloumb friction model was used to simulate the crack interaction in the tangential direction. After verification of numerical models through a case study, the seismic stability of the Koyna Dam with two types of penetrated cracks is discussed in detail with different seismic peak accelerations, and the collapse processes of the cracked dam are also presented. The results show that the stability of the dam with two types of penetrated cracks can be ensured in an earthquake with a magnitude of the original Koyna earthquake, and the cracked dam has a large earthquake-resistant margin. The failure processes of the cracked dam in strong earthquakes can be divided into two stages: the sliding stage and the overturning stage. The sliding stage ends near the peak acceleration, and the top block slides a long distance along the crack before the collapse occurs. The maximum sliding displacement of the top block will decrease with an increasing friction coefficient at the crack site.

Keywords seismic stability   concrete gravity dam   penetrated crack   plastic-damage model       hard contact algorithm   Coloumb friction model   joint opening  
Received 2011-01-28 Revised 2011-03-15 Online: 2012-03-27 
DOI: 10.3882/j.issn.1674-2370.2012.01.010

the National Basic Research Program of China (973 Program, Grant No. 2007CB714104), the National Natural Science Foundation of China (Grant No. 50779011), and the Innovative Project for Graduate Students of Jiangsu Province (Grant No. CX10B_202Z)

Corresponding Authors: Shou-Yan Jiang
Email: syjiang@hhu.edu.cn
About author:


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