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Research Spotlight: Evaluation of Seismic Design Methods for Steel Multi-Tiered Special Concentrical

2018 SSRC Annual Stability Conference

Session S2: Stability Under Seismic Loading Wednesday, April 11, 2018 11:15 a.m.

Evaluation of Seismic Design Methods for Steel Multi-Tiered Special Concentrically Braced Frames

Steel Multi-Tiered Special Concentrically Braced Frames (MT-SCBFs) are extensively used as a lateral load resisting system of tall single-storey buildings in North America. Special seismic design requirements for MT-SCBFs have recently been introduced in the AISC Seismic Provisions. However, there is a lack of research background on the seismic response of such frames to verify the proposed design provisions. In this research, the seismic response of MT-SCBFs is investigated using detailed finite element models. This investigation focuses on the response evaluation of frames designed in accordance with the 2010 and 2016 AISC Seismic Provision. Results show that behavior of brace frames design in accordance with the 2016 provisions, has significantly improved in comparison to frames designed using the 2010 provisions. Furthermore, this research provides practitioners with a better understanding of the seismic behavior of MT-SCBFs and lays the foundation for future full-scale experimental tests to further validate the current design requirements.

Pablo A. Cano and Ali Imanpour, University of Alberta, Edmonton, AB, Canada

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