A PERFORMANCE TEST AND ANALYSIS OF TWIN-BRRPS AND PUSHOVER BEHAVIOR OF RESTRAINING MEMBERS OF BRRP

Abstract

 This paper forms a part of a comprehensive study on developing a high-performance seismic damper termed Buckling Restrained Rippled Plate (BRRP) damper. In order to increase the load carrying capacity and to fulfill compactness of existing BRRPs, a new type of BRRP seismic dampers are proposed in which a set of two parallel core rippled plates are utilized to form a single BRRP named Twin-BRRP. To examine the deformation and low-cycle fatigue performances of Twin-BRRPs cyclic loading tests and analyses with variable and constant amplitudes have been performed. Furthermore the pushover behavior of the restraining members after the core plate having contacted are examined through tests and analysis.