Seismic Performance Evaluation of a New Hybrid Buckling Restrained Brace under Cyclic Loading
Publication: Journal of Structural Engineering
Volume 148, Issue 6
Abstract
This paper presents an experimental investigation on the evaluation of the seismic performance of a new hybrid buckling restrained brace (HyBRB) under cyclic load. Detailed design steps adopted for the HyBRB design are reported in this paper. The analytical method for estimation of critical loads corresponding to buckling mode formation of the steel core inside the restrainer has been presented. The design targets achieved for the HyBRB are ease of inspection of the detachable BRB core to facilitate replacement of the steel core after a seismic event, if necessary, and enhanced energy-dissipation capacity through restrained buckling about both weak and strong axes of the core. The proposed HyBRB has displayed stable hysteretic behavior with good energy-dissipation capacity in low to high levels of the core strain range. Permanent deformation about the strong axis of the core was observed on unfastening of the restrainers, although restrained buckling of the core was observed about the weak axis in lower displacement amplitudes. Analytical simulation was carried out using a phenomenological model to simulate the experimental behavior. The simulated axial force-deformation hysteresis loops were found to be in close agreement with those obtained from experimental investigation.
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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. The available data are as follows:
1.
Axial force-displacement response data for both variants HyBRB specimens.
2.
Strain-time history data recorded at specified locations.
Acknowledgments
The authors would like to thank Public Works Department (PWD), Arunachal Pradesh Government for extending financial support for carrying out experimental work reported in this paper.
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Published In
Journal of Structural Engineering
Volume 148 • Issue 6 • June 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: May 10, 2021
Accepted: Feb 16, 2022
Published online: Apr 9, 2022
Published in print: Jun 1, 2022
Discussion open until: Sep 9, 2022
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