일정진폭 하중하에 변폭 스트럿을 갖는 강재슬릿댐퍼의 구조성능에 관한실험적 연구

초록

In this study, steel slit dampers with various strut widths were subjected to cyclic tests with constant displacement amplitude loading protocol to investigate their structural performance. A total of nine specimens were fabricated using general structural rolled steel, with varied strut widths and loading protocols. Three cyclic loading protocols consisted of shear deformation angles of 3 %, 5 %, and 7 %. Experimental results indicated that as the shear deformation angle increased, the total number of cycles to reach 90 % of the maximum load decreased to an average of about half. Specimens with a maximum strut width of less than 50mm exhibited lower initial stiffness and maximum load compared to those with a maximum strut width of 100 mm, however, they demonstrated higher energy absorption capacity. This is because the specimen with a strut width of 100 mm experienced shear cracking and failure at an earlier stage, leading to a quicker reduction in strength. The arrangement of strut widths was confirmed to be a significant varied influencing the structural performance of the damper.

키워드