Smart Composite Rebars with Enhanced Ductility
A new concept for enhancing ductility in fiber-reinforced-plastic (FRP) composite reinforcing bars (rebars) is evaluated. A hybrid composite system, consisting of several brittle fibers of different stiffnesses and ultimate strains, behaves as an elastic-pseudo-ductile material. The fibers with high stiffness are laid longitudinally in the resin matrix to control the elastic modulus and the yield stress. The fibers with low stiffness and higher breaking strains are wound helically around the rebars to increase the ultimate elongation of the system and to serve as rebar protrusions for bonding to concrete. In addition, these composites offer 'smart' capability in which embedded sensors provide health monitoring and micro-damage assessment of rebars and thus the reinforced concrete structures.
A. Belarbi et al., "Smart Composite Rebars with Enhanced Ductility," Proceedings of Engineering Mechanics, American Society of Civil Engineers (ASCE), Jan 1996.
11th Conference on Engineering Mechanics
Civil, Architectural and Environmental Engineering
Mechanical and Aerospace Engineering
Electrical and Computer Engineering
Keywords and Phrases
Bonding; Brittleness -- Concretes; Ductility; Elastic Moduli; Fiber Reinforced Plastics; Monitoring; Polymers; Sensors; Stiffness; Strain; Yield Stress
Article - Conference proceedings
© 1996 American Society of Civil Engineers (ASCE), All rights reserved.