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.

Meeting Name

11th Conference on Engineering Mechanics


Civil, Architectural and Environmental Engineering

Second Department

Mechanical and Aerospace Engineering

Third Department

Electrical and Computer Engineering

Keywords and Phrases

Bonding; Brittleness -- Concretes; Ductility; Elastic Moduli; Fiber Reinforced Plastics; Monitoring; Polymers; Sensors; Stiffness; Strain; Yield Stress

Document Type

Article - Conference proceedings

Document Version


File Type





© 1996 American Society of Civil Engineers (ASCE), All rights reserved.

Publication Date

01 Jan 1996

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