Self-Centering Braces and Controlled Rocking Systems: Reduced Damage of Seismic Braced Frames [N35A]

The presentation will first provide an overview of the expected performance of current steel braced frame systems with an emphasis on the damage state that is expected following a design level earthquake. In the past few years, the development and validation of two new systems, the self centering energy dissipative bracing system as well as controlled rocking systems have demonstrated enhanced seismic resilience, and hence reduced damage, of steel braced frames. Results from large-scale experiments and numerical studies support the improved seismic performance of these systems. A proposed design procedure will be discussed for each of the systems including sample building designs and their seismic performance. Finally, some insights as to how these systems could be codified and used in future steel seismic design guidelines will conclude the presentation.

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