Seismic responses of RC braced frames with buckling-restrained braces connected to corbels
Journal
Advanced Steel Construction
Journal Volume
16
Journal Issue
1
Pages
85-93
Date Issued
2020
Author(s)
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 fo und about 70% of the sum of the two maximum horizontal strength components computed from the two joining BRBs.
Type
journal article