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Wind and Structures Volume 21, Number 6, December 2015 , pages 609-623 DOI: https://doi.org/10.12989/was.2015.21.6.609 |
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Dynamic reliability analysis of offshore wind turbine support structure under earthquake |
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Dong-Hyawn Kim, Gee-Nam Lee, Yongjei Lee and Il-Keun Lee
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| Abstract | ||
| Seismic reliability analysis of a jacket-type support structure for an offshore wind turbine was performed. When defining the limit state function by using the dynamic response of the support structure, a number of dynamic calculations must be performed in a First-Order Reliability Method (FORM). That means analysis costs become too high. In this paper, a new reliability analysis approach using a static response is used. The dynamic effect of the response is considered by introducing a new parameter called the Peak Response Factor (PRF). The probability distribution of PRF can be estimated by using the peak value in the dynamic response. The probability distribution of the PRF was obtained by analyzing dynamic responses during a set of ground motions. A numerical example is presented to compare the proposed approach with the conventional static response-based approach. | ||
| Key Words | ||
| offshore wind turbine; support structures; reliability; earthquake; dynamic response; peak response | ||
| Address | ||
| Dong-Hyawn Kim and Gee-Nam Lee: Department of Ocean Science and Engineering, Kunsan National University, Kunsan, 54150, Korea Yongjei Lee: Chang Minwoo Structural Consultants, Seoul, 135-907, Korea Il-Keun Lee: Korea Expressway Corporation Research Institure, Gyeonggi, 18489, Korea | ||