SEISMIC RESPONSE CONTROL OF SUPER HIGH-RISE RC BUILDINGS UTILIZING BUCKLING RESTRAINED BRACES AND THE DESIGN OF BRACE CONNECTIONS

- Applications of buckling restrained braces in reinforced concrete frames Part 3 -

Abstract

 In this paper, the seismic response control of buckling restrained braces (BRBs) in RC buildings subjected to earthquake ground motions is investigated by nonlinear time history analysis. In one model, the RC frame was braced by BRBs in each story (each model) and in the other one, each BRB spanned over two stories (over model). As a result of the analysis, the over model exhibited almost the same seismic response control as compared to the each model, although the number of BRBs was significantly reduced and the RC beams in the braced span were abandoned. In addition, the seismic response control of BRBs in RC buildings is investigated by FE analysis. Finally, the design of brace connections was suggested from the test and analysis result.