Study of GFRP Steel Buckling Restraint Braces
Publication: Journal of Composites for Construction
Volume 19, Issue 6
Abstract
Buckling-restraint braces (BRBs) are used extensively in seismic-resistant structures. They consist of a core energy dissipation and external restraining component. A novel glass fiber–reinforced polymer (GFRP) steel BRB is proposed. In the GFRP steel BRB, four GFRP pultruded tubes, which are tied together by GFRP wrapping layers, are used to restrict core steel component buckling instead of conventional steel tube and infilled concrete or mortar. This GFRP steel BRB is extremely lightweight. Techniques for manufacturing GFRP steel BRB were developed for convenient large-scale industrialized production. Quasi-static tests were carried out to validate the performance of the GFRP steel BRB under cyclic loading. The tests focused mainly on energy dissipation capacity and ultimate failure mode of the proposed GFRP steel BRB. The effect of applying additional reinforcements to the GFRP external restraining component on the performance of GFRP steel BRB was also investigated. The performance of the appropriately designed GFRP steel BRB was satisfactory; however, it is prone to damage from local failure of external restraining GFRP components and additional reinforcements may enhance its performance.
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Acknowledgments
Financial support from the National Key Basic Research Program of China (973 Program) under Grant No. 2012CB026204, and that by the Natural Science Foundation of China under Grant Nos. 51178250 and 51422809 is gratefully acknowledged.
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Published In
Journal of Composites for Construction
Volume 19 • Issue 6 • December 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Oct 13, 2014
Accepted: Jan 6, 2015
Published online: Feb 17, 2015
Discussion open until: Jul 17, 2015
Published in print: Dec 1, 2015
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