Seismic Performance of Buildings with Special Steel Moment Frames Using Modified End Plate and Shear Plate Connections
Publication: Journal of Structural Engineering
Volume 148, Issue 3
Abstract
Nonlinear response history analyses were conducted to determine the seismic collapse safety and seismic performance of buildings with special steel moment frames using Simpson Strong-Tie Strong-Frame moment frames compared to equivalent buildings using reduced beam section (RBS) moment frames. The Strong-Frame moment connection consists of a modified T-stub or end plate connection incorporating Yield-Link structural fuses for moment transfer, and a modified shear plate connection for shear transfer. Archetypical 4-story, 8-story, 12-story, and 20-story steel frame buildings designed using ASCE 7-16 were evaluated. The results indicate that the Strong-Frame buildings have a 36% larger adjusted collapse margin ratio and are less likely to collapse, compared to the RBS buildings. The Strong-Frame buildings also have lower probable repair costs and shorter repair time compared to the RBS buildings. The improved collapse safety and enhanced performance of the Strong-Frame buildings are attributed to the stronger column web panel zone, inclusion of column bending moments in seismic overstrength load combinations, delayed connection strength degradation, a distributed global collapse mechanism, and replaceable connection components.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request (data analyzing scripts, information on the design of the RBS and Strong-Frame moment frames).
Acknowledgments
Financial support for this research was provided by Simpson Strong-Tie. The views expressed in this paper are those of the authors and do not necessarily reflect the views of those acknowledged.
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Published In
Journal of Structural Engineering
Volume 148 • Issue 3 • March 2022
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Mar 25, 2021
Accepted: Nov 1, 2021
Published online: Dec 29, 2021
Published in print: Mar 1, 2022
Discussion open until: May 29, 2022
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