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Development and experimental validation of a novel double-stage yield steel slit damper-buckling restrained brace
Abstract
This research is focused on the development and experimental validation of a novel double-stage yield steel slit damper-buckling restrained brace (SSD-DYB) system designed for seismic resistance of steel structures. The SSD-DYB integrates the energy dissipation capability of a steel slit damper (SSD) in its initial segment, enhancing performance in the case of lower seismic intensities levels while employing a larger segment for higher load resistance to maintain structural stability. The results of the study show that the proposed SSD-DYB is capable to reduce the weight of similar all-steel buckling restrained braces (BRBs) successfully addressing critical points through stiffeners and top and bottom plates. Additionally, the U-shaped element exhibits resilience during seismic loads, indicating its potential for replacing cores without failure which would be beneficial for seismic retrofitting of buildings. Experimental tests show that varying the number and shape of SSD strips significantly impacts the hysteresis curve's maximum load and dissipated energy (i.e., adding strips increased energy dissipation by 33.48 % for SSD-DYB-1), which can be used to control the proposed device for a specific performance target. Stopper mechanisms within the SSD-DYB regulate load distribution between segments and can be used to control the device and its transmitting capacities. Finally, an optimized SSD-DYB has been proposed with promising performance to be used by researchers for designing new structures or retrofit old ones.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
ENGINEERING STRUCTURES
no. 315,
ISSN: 0141-0296 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Kazemi F., Asgarkhani N., Lasowicz N., Jankowski R.: Development and experimental validation of a novel double-stage yield steel slit damper-buckling restrained brace// ENGINEERING STRUCTURES -Vol. 315, (2024), s.118427-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.engstruct.2024.118427
- Sources of funding:
-
- COST_FREE
- Verified by:
- Gdańsk University of Technology
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