| Title |
An Experimental Study on Reinforcement Method for Reuse of Onshore Wind Turbine Spread Footing Foundations |
| Authors |
송성훈(Song, Sung Hoon) ; 정연주(Jeong, Youn Ju) ; 박민수(Park, Min Su) ; 김정수(Kim, Jeong Soo) |
| DOI |
https://doi.org/10.12652/Ksce.2021.41.1.0001 |
| Keywords |
리파워링;확대기초;앵커부 설계;연결재;콘크리트 콘 파괴 Repowering;Spread footing;Design of anchorage part;Connector;Concrete cone failure |
| Abstract |
In order to reuse existing onshore turbine foundations, it is important to redesign and reinforce the existing foundations according to the upgraded tower diameter and turbine load. In the present study, a slab extension reinforcement method and structure details of an anchorage part were examined in consideration of the reuse of spread footings, which are the most widely used foundation type in onshore wind turbine foundations. Experiments were conducted to evaluate the load resistance performance of a reinforced spread footing according to structure details of an anchorage part. The results showed that (1) the strength of an anchorage part could be increased by more than 30 % by adding reinforcement bars in the anchorage part, (2) pile-sleeves attached to an anchor ring contributed to an increase in rotational stiffness by preventing shear slip behavior between the anchor ring and the concrete, and (3) slab connectors contributed to an increase in the strength and deformation capacity by preventing the separation of new and old concrete slabs. |