Numerical Investigation on Damage of Concrete Gravity Dam during Noncontact Underwater Explosion
Publication: Journal of Performance of Constructed Facilities
Volume 33, Issue 6
Abstract
A three-dimensional (3D) numerical model was developed in this paper to investigate the damage and failure of a concrete gravity dam under attack from a noncontact underwater explosion based on experiments performed in centrifuge. The effects of shock waves and bubble oscillation were considered based on a multistage histogram of pressure. The damage and failure of a concrete dam were represented by a rate-dependent damage-plasticity model. Systematic numerical simulations and a parametric study were performed considering different cases of explosive charges, standoff distances, and explosive depths. By adopting the shock factor, the explosive charge and the standoff distance were condensed into one governing factor, and an empirical formula was proposed to estimate the damage of the concrete dam under attack from an underwater explosion.
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Acknowledgments
This work was supported by National Natural Science Foundation of China (Grant Nos. 51339006 and 51678439). The authors would like to show their appreciation to the reviewers for the valuable suggestions.
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Published In
Journal of Performance of Constructed Facilities
Volume 33 • Issue 6 • December 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Nov 7, 2018
Accepted: Mar 12, 2019
Published online: Sep 10, 2019
Published in print: Dec 1, 2019
Discussion open until: Feb 10, 2020
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