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EVALUATION OF DISPLACEMENT AMPLIFICATION FACTORS FOR STEEL BUCKLING RESTRAINED BRACED FRAMES

2016-12-09
Bozkurt, Mehmet Bakir
Ozkilic, Yasin Onuralp
Topkaya, Cem
In the United States, design of buckling restrained braced frames (BRBFs) is conducted using the recommendations given in the Seismic Provisions for Structural Steel Buildings (AISC341-10) and Minimum Design Loads for Buildings and Other Structures (ASCE 7-10). In this study, deflection amplification factor given in ASCE7-10 for BRBFs was evaluated. Pursuant to this goal. three archetypes composed of single diagonal BRBFs were designed. The archetypes represent designs in high seismic regions which are defined as Seismic Design Category D-max according to FEMA P695. The archetypes were subjected to Maximum Considered Earthquake (MCE) and Design Based Earthquake (DBE) ground motions using 44 far-field records. Elastic and inelastic time history analyses of these archetypes were conducted by using OPENSEES software. The deflection amplification factor for BRBFs were obtained from analysis results and compared with the codified value. The results indicate that the lower stories experience larger displacements and the upper stories experience lower displacements when compared with code estimates.