Experimental Study of Newly Developed Hybrid Buckling-Restrained Brace with Different Infill-Layer Geometries under Cyclic Loading
Publication: Practice Periodical on Structural Design and Construction
Volume 28, Issue 4
Abstract
Hybrid buckling restrained brace (HyBRB) is a new inspectable passive energy dissipating device which comprises of an axially load carrying prismatic steel core, a pair of steel restrainers, and high damping neoprene infill layers in between restrainer and core. In this study, influence of infill layer geometry on performance of HyBRB is investigated. HyBRB specimens are designed to facilitate restrained local buckling initially about weak axis and subsequently about strong axis at high axial core strain level. Three variants of HyBRB are tested under cyclic displacement protocol. Experimental results established that the hysteretic behavior of all three variants of HyBRB are stable with compressive strengths are comparable to the corresponding tensile strengths. Shear deformation in the infill layers enhanced damping in the HyBRBs in low axial strain level. Restrained local buckling about strong axis of the core helps to achieve enhanced energy dissipation capacity and effective stiffness in high axial strain levels. Continuous infill layers in HyBRB significantly enhanced equivalent damping factor (about 22%) as compared to that with the discontinuous infill layer (about 18%). However, all three variants of the newly developed HyBRB provide a mechanism for simple yet efficient energy dissipation.
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Data Availability Statement
All data that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
Authors would like to thank Public Works Department (PWD), and Arunachal Pradesh (Grant No. xxCESPNxPWD00281xSKD006) for extending financial support for carrying out experimental work reported in this paper.
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Information & Authors
Information
Published In
Practice Periodical on Structural Design and Construction
Volume 28 • Issue 4 • November 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Dec 25, 2022
Accepted: May 10, 2023
Published online: Jul 10, 2023
Published in print: Nov 1, 2023
Discussion open until: Dec 10, 2023
ASCE Technical Topics:
- Axial forces
- Axial loads
- Bracing
- Buckling
- Compressive strength
- Construction engineering
- Construction methods
- Continuum mechanics
- Damping
- Dynamics (solid mechanics)
- Energy dissipation
- Engineering fundamentals
- Engineering mechanics
- Forces (type)
- Hybrid methods
- Material mechanics
- Material properties
- Materials engineering
- Methodology (by type)
- Solid mechanics
- Static loads
- Statics (mechanics)
- Strength of materials
- Structural dynamics
- Thermodynamics
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