Vol. 16, No. 1, pp. 85-93 (2020)
SEISMIC RESPONSES OF RC BRACED FRAMES WITH BUCKLING
RESTRAINED BRACES CONNECTED TO CORBELS
An-chin Wu 1, Keh-chyuan Tsai 2, *, Ting-li Lin 3, Ching-yi Tsai 4 and Kung-juin Wang 5
1 Associate researcher, National Center for Research on Earthquake Engineering, Taipei, Taiwan, China
2 Professor, Department of Civil Engineering, National Taiwan University, Taipei, Taiwan, China
3 Research assistant, Department of Civil Engineering, National Taiwan University, Taipei, Taiwan, China
4 Post doctor, Department of Civil Engineering, National Taiwan University, Taipei, Taiwan, China
5 Technologist, Department of Civil Engineering, National Taiwan University, Taipei, Taiwan, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 24 July 2019; Revised: 7 February 2020; Accepted: 7 February 2020
DOI:10.18057/IJASC.2020.16.1.10
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ABSTRACT
The paper is a continuation of the investigation on a newly developed bracing system featured by the zigzag configured braced frame for reinforced concrete (RC) constructions. A 12-story RC frame equipped with buckling-restrained braces (BRBs) is investigated as a prototype building. The feasibility and performance of the proposed BRB-to-RC connection are investigated using a cyclic loading procedure on a full-scale beam-to-column sub-assemblage specimen selected from the typical floor. No failure was observed in the steel gusset bracket or at the RC corbels throughout the tests. Seismic performance of the prototype building was further studied using a total of 240 ground accelerations in the building response history analyses. Analytical results suggest that the effects of system’s high mode vibrations are moderate. The peak horizontal tension force demand on the steel gusset bracket is found about 70% of the sum of the two maximum horizontal strength components computed from the two joining BRBs.
KEYWORDS
Buckling-restrained brace, reinforced concrete building, corbel, beam-to-column joint, nonlinear response history analysis
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