풍하중 효과를 고려한 해상풍력 지지구조물의 유효응력기반 지진해석
Effective Stress-Based Seismic Analysis of Offshore Wind Turbine Support Structure Considering Wind Load Effects
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초록
In this study, seismic analysis of a 3 MW offshore wind turbine support structure was performed by considering the effective stress effect of ground soil and wind load. The pore water pressure was distributed to consider the effective stress effect. A simple formula by Byrne (1991) was used to estimate some parameters and applied to the Finn model. In this paper, seismic analysis based on the total stress and effective stress of the ground was performed, and the responses of offshore wind turbine support structures were compared. In addition, the effect of wind and earthquake load on the ground was also confirmed. As a result of the analysis, the relative displacement is larger in the effective stress analysis, and the displacement difference is larger when the wind load and seismic load are considered simultaneously. It was shown from the results that the effective stress of ground soil should be considered to obtain more reliable responses for offshore wind turbine support structures.
Abstract
In this study, seismic analysis of a 3 MW offshore wind turbine support structure was performed by considering the effective stress effect of ground soil and wind load. The pore water pressure was distributed to consider the effective stress effect. A simple formula by Byrne (1991) was used to estimate some parameters and applied to the Finn model. In this paper, seismic analysis based on the total stress and effective stress of the ground was performed, and the responses of offshore wind turbine support structures were compared. In addition, the effect of wind and earthquake load on the ground was also confirmed. As a result of the analysis, the relative displacement is larger in the effective stress analysis, and the displacement difference is larger when the wind load and seismic load are considered simultaneously. It was shown from the results that the effective stress of ground soil should be considered to obtain more reliable responses for offshore wind turbine support structures.
참고문헌 (14)
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