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Institute of Construction and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

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Nam-Hoon Kim

Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

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Sang-Ho Oh

Coastal Engineering Division, Korea Institute of Ocean Science and Technology, 385 Haeyang-ro, Yeongdo-gu, Busan 49111, Republic of Korea

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Chang-Hwan Ji

Ocean and Environment Research Division, Busan Development Institute, 955 Jungang-daero, Busanjin-gu, Busan 47210; (formerly Coastal Engineering Division, Korea Institute of Ocean Science and Technology), Republic of Korea

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, and

Dong Hyawn Kim

Department of Ocean Science and Engineering, Kunsan National University, 558 Daehak-ro, Gunsan-si 54150, Republic of Korea

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https://doi.org/10.1142/S2529807018500021Cited by:0 (Source: Crossref)

Abstract

In this study, the performance-based design method developed for a conventional solid-wall caisson breakwater is extended to a perforated-wall caisson breakwater. First, to verify the mathematical model to calculate the sliding distance of a perforated-wall caisson, hydraulic experiment is conducted. A good agreement is shown between the model and experimental results. The developed performance-based design method is then compared with the conventional deterministic method in different water depths. Both the expected sliding distance and the exceedance percentage of total sliding distance during the structure lifetime decrease shorewards outside the surf zone, but they increase again toward the shore inside the surf zone. The performance-based design method is either more economical or less economical than the deterministic method depending on which design criterion is used. If the criterion for expected sliding distance or exceedance percentage is used in the ultimate limit state, the former method is less economical than the latter outside the surf zone, whereas the two methods are equally economical inside the surf zone. However, if the breakwater is designed to satisfy the criterion for exceedance percentage in the repairable limit state, the former method is more economical than the latter in all water depths.

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