Cyclic shear response of non-seismic reinforced concrete frame strengthened with buckling-restrained X-shaped steel panel damper
Yeon-Back Jung,Ju-Hyun Mun,Jae-Il Sim,Seung-Hyeon Hwang,Sanghee Kim,Do-Bum Kim
Abstract
In this study, the strengthening effect of a buckling-restrained X-shaped steel panel damper (BRPD) with cover plates on the shear response of a non-seismic reinforced concrete (RC) frame is verified. A non-strengthened RC frame and three RC frames strengthened with a BRPD were tested under constant axial and cyclic lateral loads. The main parameters were the connection method between the RC frame and the H-shaped frame connected to the BRPD, including in- and side-plane strengthening. Test results showed that in-plane strengthening using the BRPD effectively reduced the pinching effect, as indicated by a wide hysteresis loop in each cycle of the lateral load–displacement relationship. Consequently, the shear capacity, cumulative dissipated energy at the 80% of peak load in the post-peak behavior, and equivalent damping ratio of the in-plane strengthened RC frames using the H-shaped frame connected to the BRPD were 1.72, 5.15, and 2.18 times higher, respectively, than those of the non-strengthened RC frame.
Yeon-Back Jung — Hyundai Engineering and Construction, Seoul, South Korea
Ju-Hyun Mun — Department of Architectural Engineering, Kyonggi University, Suwon, Gyonggi-do, South Korea
Jae-Il Sim — Korea Disaster Prevention Safety Technology Co., Ltd, Gwangju, Jeollanam-do, South Korea
Seung-Hyeon Hwang — Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Gyonggi-do, South Korea
Sanghee Kim — Department of Architectural Engineering, Kyonggi University, Suwon, Gyonggi-do, South Korea
Do-Bum Kim — N.I STEEL Co., Ltd. R&D Center, Seoul, South Korea
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