A Novel Hybrid Self-Centering Piston-Based Bracing Fitted with SMA Bars and Friction Springs: Analytical Study and Seismic Simulation
Publication: Journal of Structural Engineering
Volume 149, Issue 6
Abstract
Self-centering piston-based braced frames (SC-PBBFs) are such structural assemblies that can withstand a severe earthquake through passive control. The self-centering motion of the bracing system curtails the seismic permanent damage of a building, thereby considerably mitigating postearthquake repair costs and downtime. This paper proposes a novel hybrid self-centering piston-based bracing (SC-PBB) equipped with friction springs (FS) and superelastic shape-memory alloy (SMA) bars. Analytical formulas are presented for rapid analysis and preliminary seismic design of the SC-PBBFs fitted with SC-PBBs. The general mechanics of the proposed archetypes confirms their symmetric self-centering behavior. To validate the proposed design procedure, a set of SC-PBBFs fitted with tension-only SMA bars and precompressed FS is examined under far-field ground motions. Effects of prestressing of components and earthquake types (crustal, subcrustal, and subduction) are quantified and compared with the responses of buckling-restrained braced frames (BRBFs). The analysis outcomes revealed the effectiveness of the proposed hybrid SC-PBBF subjected to design-level earthquakes.
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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
Financial contributions of the Natural Sciences and Engineering Research Council (NSERC) of Canada through the Discovery Grant are gratefully acknowledged.
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© 2023 American Society of Civil Engineers.
History
Received: Aug 9, 2022
Accepted: Nov 29, 2022
Published online: Mar 27, 2023
Published in print: Jun 1, 2023
Discussion open until: Aug 27, 2023
ASCE Technical Topics:
- Bracing
- Construction engineering
- Construction methods
- Continuum mechanics
- Dynamics (solid mechanics)
- Earthquake engineering
- Earthquakes
- Engineering fundamentals
- Engineering mechanics
- Frames
- Friction
- Geohazards
- Geotechnical engineering
- Geotechnical investigation
- Ground motion
- Hybrid methods
- Methodology (by type)
- Seismic design
- Seismic tests
- Solid mechanics
- Structural engineering
- Structural members
- Structural systems
- Tests (by type)
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