Novel Ductile FRP System for Concrete Reinforcement: Concept and Experimental Characterization
Publication: Journal of Composites for Construction
Volume 23, Issue 4
Abstract
This paper presents a novel design concept for fiber reinforced polymer (FRP) composites consisting of three-dimensional (3D) printed cores and FRP helical skins as a means of ensuring adequate ductility relative to the brittle FRP systems conventionally used for internal reinforcement. The experiment demonstrated that when the FRP skins were loaded in tension, the core—which was 3D printed using acrylonitrile butadiene styrene or polylactic acid—was gradually compressed, thereby leading to plastic deformation. This behavior ensured a nonlinear load response while eliminating the unfavorable brittle failure of the FRPs. The results also indicated that the proposed FRP composite system ensured that no premature debonding/delamination occurred between the skin–skin and skin–core. The results of the parametric experimental study indicated that design parameters, such as the FRP amount, core height, core span, core shell thickness, core material, core brace, and core number (i.e., the number of inner cores used for the composite), may be optimized to realize the expected design load capacity and ductility.
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Acknowledgments
The support of the National Natural Science Foundation of China [Grant No. 51608244], the Key Laboratory of Ministry of Education for Mechanics on Western Disaster and Environment, the School of Civil Engineering and Mechanics at Lanzhou University, and the School of Engineering and the Environment at the University of Southampton are gratefully acknowledged. The authors express their thanks to Dr. Xingzhe Wang for his kind willingness to share the laboratory with us.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 23 • Issue 4 • August 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Sep 5, 2018
Accepted: Jan 25, 2019
Published online: Jun 13, 2019
Published in print: Aug 1, 2019
Discussion open until: Nov 13, 2019
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