Seismic collapse performance of high-rise mass timber building with buckling-restrained braced frames: Fid-Bau Portal

Seismic collapse performance of high-rise mass timber building with buckling-restrained braced frames

Badal, Prakash S. / Tesfamariam, Solomon

Abstract The present paper proposes a hybrid building system with the buckling-restrained brace and Glulam frames (BRBGF). For a highly seismic location of Vancouver, Canada, an 18-story building is designed with BRBGF as the lateral load-resisting system for the seismic hazard of NBC 2020. A nonlinear analytical model is developed and validated with the experimental data. Further, 30 pairs of ground motion records are selected to represent the complex seismicity of Southern British Columbia consisting of Shallow Crustal, Subduction Interface, and In-slab faulting mechanisms. The BRBGF system is found to achieve the target of maximum inter-story drift of 2.5% for the 2,475-year return period event. The building also passes the FEMA P695 criteria for acceptable collapse margin for seismic force modification factors of $R_{d} = 4$ and $R_{o} = 1.2$ . The results from the study indicate the feasibility of high-rise timber buildings in highly seismic regions.

Highlights • A high-rise hybrid lateral force-resisting system with mass timber is developed. • An existing building is repurposed as an 18-story BRBGF in Vancouver, Canada. • Vancouver’s complex seismicity is characterized using NBC 2020-consistent records. • High-rise timber building’s seismic collapse and modification factors are estimated.