Title: Seismic demand evaluation of reinforced-concrete buckling-restrained braces for precast concrete frames
Date Published: November - December 2024
Volume: 69
Issue: 6
Page Numbers: 58 - 76
Authors: Shane Oh, Jon Mohle, Lily A. Pearson, Mark P. Manning, Brad D. Weldon, and Yahya C. Kurama
https://doi.org/10.15554/pcij69.6-02

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Abstract

This study numerically investigated the dynamic seismic response of multistory precast concrete frame structures for Wiss, Janney, Elstner Associates Inc. in Northbrook, Ill. using a novel reinforced-concrete buckling-restrained brace component. The maximum demands on the braces were quantified with the intent to guide future experimental testing and validation according to the collapse performance requirements of FEMA P695. A set of 26 braced frame archetypes were designed using seismic Body text procedures consistent with current U.S. building code requirements, and effective linear-elastic as well as non-linear numerical models of these frame structures were Keywords developed. In addition to monotonic static pushover Body text analyses, the nonlinear archetype models were subjected to a set of 44 scaled ground motion records to quantify Review policy the system overstrength factor, maximum interstory drift, design story drift, brace ductility, cumulative brace Body text ductility, and end gap closure. It was found that braces designed for a maximum design story drift of 4% and Reader comments demonstrating ductility capacities of at least 51 and cumulative ductility capacities of at least 297 are needed Body text for braced frame structures in high seismic regions to satisfy the median collapse performance criteria in FEMA P695.