Effects of different core plate properties on global response of BRBFs

Bozkurt, Mehmet Bakır
Özkılıç, Yasin Onuralp
Topkaya, Cem
Steel buckling restrained braced frames (BRBFs) are one of the most preferred lateral load resisting systems in seismic prone regions due to their high elastic stiffness and high ductility. Buckling restrained braces (BRBs) utilize a core segment which is used as a fuse element to provide a high level of energy dissipation without loss of inherent axial load carrying capacity. Only the yielding part of the entire core segment is subjected to inelastic deformation during a destructive earthquake. Therefore, yield strength and yielding length of the core plates are the most important parameters that influence story drifts and inelastic behavior of BRBs. In this study, four chevron 6-story BRBF archetypes having BRBs with different yield strength and yielding length were designed according to ASCE7-10 and AISC341-10 provisions. Non-linear time history analysis of the archetypes were conducted by considering 44 far-field ground motions defined in FEMA P695 and scaled to Maximum Considered Earthquake (MCE) for Seismic Design Category Dmax. Story drifts and brace axial strains obtained from time history analyses are reported. The axial strain demands obtained from inelastic time history analyses are compared with the demands recommended by AISC341-10.
Citation Formats
M. B. Bozkurt, Y. O. Özkılıç, and C. Topkaya, “Effects of different core plate properties on global response of BRBFs,” presented at the 9th Hellenic National Conference of Steel Structures, 5-7 October 2017, Larisa, Greece, 2017, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/87402.