Impact Behavior of CFRP-Strip–Wrapped RC Beams without Stirrups
Publication: Journal of Composites for Construction
Volume 21, Issue 5
Abstract
An experimental program was conducted to investigate the shear impact behavior of RC beams without stirrups, and to evaluate the enhancement effects of carbon fiber–reinforced polymer (CFRP)–wrapping retrofit. Eleven RC beam specimens were tested under static and impact loading. Two out of the 11 specimens were control specimens without retrofit, while the rest were retrofitted with CFRP wraps. The effects of varying impact velocity and impact energy on the dynamic behavior were taken into main consideration. This paper discusses the crack patterns and failure modes, time histories of dynamic forces, midspan deflection, accelerations, and CFRP strains. The results show that the CFRP retrofit can enhance the impact resistance of RC beams, significantly reduce their deflection, and limit the damage. The effects of CFRP wrapping for RC beams are found to be different for static and impact loading. The varying impact velocity and impact energy had different effects on the dynamic response and caused changes in failure modes.
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Acknowledgments
The experimental work of this research was conducted at the Center for Integrated Protection Research of Engineering Structures (CIPRES), MOE Key Laboratory of Building Safety and Energy Efficiency at Hunan University under the supports of the National Key Basic Research Program of China (973-2012CB026200), Hunan Provincial Innovation Foundation for Postgraduate. The analysis of the comprehensive testing results was partially supported by the Thousand-Talent National Expert Scholarship at Nanjing Tech University to the second author and the visiting scholarship of Seoul National University provided to the first author.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 21 • Issue 5 • October 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Sep 1, 2016
Accepted: Jan 30, 2017
Published online: Apr 25, 2017
Discussion open until: Sep 25, 2017
Published in print: Oct 1, 2017
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