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Probabilistic Seismic Risk Analysis of Breakwater Structures  

Kim Sang-Hoon (Daewoo Engineering & Construction Co., LTD)
Yi Jin-Hak (Smart Infra-Structure Technology Center, KAIST)
Kim Doo Kie (Department of Civil & Environmental Engineering, Kunsan National University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.17, no.1, 2005 , pp. 32-40 More about this Journal
Abstract
Recent earthquakes over magnitude 5 in the eastern coast of Korea have aroused interests in the earthquake analyses and seismic design of breakwater structures. Most of earthquake analysis methods such as equivalent static analysis, response spectrum analysis, nonlinear analysis, and capacity analysis methods are deterministic and have been used for seismic design and performance evaluation of breakwater structures. However, deterministic methods are difficult to reflect one of the most important characteristics of earthquakes, i.e. the uncertainty of earthquakes. This paper presents results of probabilistic seismic risk assessment(PSRA) of an actual caisson type breakwater structure considering uncertainties of earthquake occurrences and soil properties. First the seismic vulnerability of a structure and the seismic hazard of the site are evaluated using earthquake sets and seismic hazard map, and then seismic risk of the structure is assessed.
Keywords
breakwater structure; deterministic method; probabilistic method; seismic risk analysis; seismic fragility; seismic hazard;
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