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http://dx.doi.org/10.9765/KSCOE.2020.32.2.95

Stability Evaluation of Rear-Parapet Caisson Breakwaters under Regular Waves by Numerical Simulation  

Lee, Byeong Wook (Coastal Development and Ocean Energy Research Center, Korea Institute of Ocean Science and Technology)
Park, Woo-Sun (Coastal Development and Ocean Energy Research Center, Korea Institute of Ocean Science and Technology)
Ahn, Sukjin (Research and Development Institute, GeoSystem Research Corporation)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.32, no.2, 2020 , pp. 95-105 More about this Journal
Abstract
In this study, using the CADMAS-SURF model, the characteristics of the wave pressures and the wave forces were analyzed according to the installation position of the parapet on top of the caisson, and the stability evaluation was carried out using estimated wave forces for the design wave condition. Numerical results show that adopting the rear-parapet reduces the front maximum wave pressures and wave forces, and the maximum wave pressure acting on the rear-parapet increases slightly compared to the front parapet, but the wave force acting on the rear-parapet has little effect on the stability of the breakwater due to the phase difference with the wave force acting on the front of the breakwater. In addition, impulsive wave pressures did not occur, as Yamamoto et al. (2013) pointed out the problem of the rear-parapet breakwater. As a result of the stability against sliding and overturning, it was estimated that the target safety factor of 1.2 could be secured by the self-weight of 13% less than the case of the front parapet. At this time, the maximum ground pressure was also reduced by 30%, and the applicability of the rear-parapet structure to the actual site was evaluated as high.
Keywords
caisson breakwater; parapet; wave force reduction; phase difference; numerical simulation;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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