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7685362 
Journal Article 
Damage prediction of concrete gravity dams subjected to underwater explosion shock loading 
Wang, G; Zhang, S; , 
2014 
Yes 
Engineering Failure Analysis
ISSN: 1350-6307 
PERGAMON-ELSEVIER SCIENCE LTD 
OXFORD 
39 
72-91 
English 
WOS:000334019600008 
The damage prediction of concrete gravity dams under blast loads has gained importance in recent years due to the great number of accidental events and terrorist bombing attacks that affected engineering safety. It has long been known that an underwater explosion can cause significantly more damage to the targets in water than the same amount of explosive in air. While the physical processes during an underwater explosion and the subsequent response of structures are extremely complex, which involve lots of complex issues such as the explosion, shock wave propagation, shock wave-structure interaction and structural response. Hence a sophisticated numerical model for the loading and material responses would be required to enable more realistic reproduction of the underlying physical processes. In this paper, a fully coupled numerical approach with combined Lagrangian and Eulerian methods, incorporating the explosion processes, is performed. The RHT (RiedelHiermaier-Thoma) model including the strain rate effect is employed to model the concrete material behavior subjected to blast loading. Detailed numerical simulation and analysis of a typical concrete gravity dam subjected to underwater explosion are presented in this study. In terms of different TNT charge weights, the structural response and damage characteristics of the dam at different standoff distances are investigated. Based on the numerical results, critical curves related to different damage levels are derived. (C) 2014 Elsevier Ltd. All rights reserved. 
Concrete gravity dam; Coupled model; Damage prediction; Shock wave propagation; Underwater explosion 
SUSI 2014 
New Forest, UK