Verification of Seismic Response Modification Factors of Uncoupled Composite Plate Shear Walls/Concrete Filled
Publication: Journal of Structural Engineering
Volume 149, Issue 6
Abstract
In this paper, the seismic design factors for uncoupled composite plate shear walls/concrete filled (C-PSW/CF), a.k.a. SpeedCore, are verified by conducting a study using FEMA methodology. These are the seismic response modification factor, R, the deflection amplification factor, Cd, and the overstrength factor, Ωo; and their values for C-PSW/CF are specified as 6.5, 5.5, and 2.5, respectively. A study was needed, as these factors for uncoupled C-PSW/CFs, included in ASCE 7 since as far back as its 2000 edition, were chosen solely based on the seismic performance of similar structural systems and engineering judgment of the committee members. For this study, four archetypes with planar walls and three archetypes with C-shaped C-PSW/CF walls were chosen. Two different damage measures (DM) were chosen for this study; namely, 3% and 5% maximum interstory drifts. Based on FEMA methodology, all archetypes satisfied the specified performance requirement considering a “good” rating for total system collapse uncertainty (βTOT).
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research was performed as an extension of the work testing C- and T-shaped C-PSW/CF and developing new seismic response factors (R-factors) for coupled C-PSW/CF that was conducted with support from the Charles Pankow Foundation (CPF) and the American Institute of Steel Construction (AISC), through CPF Research Grant #05-17 awarded to co-PIs Michel Bruneau, from University at Buffalo and Amit H. Varma, from Purdue University. Approach and methodologies approved in these previous studies were re-used here. Therefore, the authors are again grateful to members of the Peer Review Panel of these prior projects [Gregory G. Deierlein, Professor, Stanford University; Ron Klemencic, Chairman & CEO, Magnusson Klemencic Associates (MKA); and Rafael Sabelli, Principal and Director of Seismic Design, Walter P. Moore], and members of the Project Advisory Team [Larry Kruth, Vice President, American Institute of Steel Construction (AISC); John D. Hopper, Senior Principal/Director of Earthquake Engineering, MKA; Jim Malley, Senior Principal, Degenkolb Engineers; Bonnie Manley, Regional Director of Construction Codes and Standards, American Iron and Steel Institute (AISI); and Tom Sabol, Principal, Englekirk Institutional] as their technical guidance was valuable in formulating the methodology re-used for this current study on uncoupled walls.
References
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 149 • Issue 6 • June 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jun 21, 2022
Accepted: Jan 20, 2023
Published online: Mar 29, 2023
Published in print: Jun 1, 2023
Discussion open until: Aug 29, 2023
ASCE Technical Topics:
- Business management
- Composite structures
- Earthquake engineering
- Engineering fundamentals
- Federal government
- Geotechnical engineering
- Government
- Methodology (by type)
- Organizations
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- Practice and Profession
- Research methods (by type)
- Seismic design
- Seismic effects
- Seismic tests
- Shear walls
- Structural engineering
- Structural members
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- Structures (by type)
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- Verification
- Walls
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