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CONCRETE REINFORCEMENT - FRP REBAR (Part 3)

Codes and Specifications

FRP rebars offer many advantages over other concrete reinforcing products. The properties of the FRP rebars are different from those of steel reinforcement. The design of concrete reinforced with FRP rebars is different in many cases. Design engineers should consider the appropriateness of reinforcing concrete with FRP rebars, keeping in mind the following basic points for design:

• Direct substitution of FRP rebars in concrete members designed with steel bars is not possible in most cases.

• Lower modulus of elasticity and shear strength of FRP rebars will limit the applications to short spans of secondary structural elements.

• Glass FRP rebar is limited to a maximum sustained stress of 20% of the guaranteed design tensile strength.

• Glass FRP rebar applications are limited to the reinforcement of concrete and are not to be used as a pre-stressing or post-tensioning element.

Current publications available for reference:

USA

• ACI 440.1R-01 2001, Guide for the Design and Construction of Concrete Reinforced with FRP Bars, Committee 440, American Concrete Institute, Farmington Hills, MI. (May 2001), www.aci-int.org

• ACI 440R 1996, State-of-the-Art Report on Fiber Reinforced Plastic Reinforcement for Concrete Structures, Committee 440, American Concrete Institute, Farmington Hills, MI. (February 1996), 67 pp.
   

Canada
 

• CAN/CSA-S806-02, Design and Construction of Building Components with Fibre-Reinforced Polymers, Canadian Standards Association, Toronto, Ontario, Canada  (May 2002), 187 pp.

• CAN/CSA-S6-00, Canadian Highway Bridge Design Code, Canadian Standards Association, Toronto, Ontario, Canada (December 2000), 734pp.

• ISIS Canada, Design Manual No. 3, Reinforcing Concrete Structures with Fiber Reinforced Polymers, Canadian Network of Centers of Excellence on Intelligent Sensing for Innovative Structures, ISIS Canada Corporation, Winnipeg, Manitoba, Canada (Spring 2001), 158 pp, www.isiscanada.com

Japan

• Japan Society of Civil Engineers (JSCE), Recommendation for Design and Construction of Concrete Structures Using Continuous Fiber Reinforced Materials, Concrete Engineering Series 23, ed. by A. Machida, Research Committee on Continuous Fiber Reinforcing Materials, Tokyo, Japan, (1997), 325 pp.

Europe

• fib Task Group 9.3, FRP Reinforcement for Concrete Structures, Federation Internationale du Beton, (1999)

• Report # STF 22 A 98741, Eurocrete Modifications to NS3473 When Using FRP Reinforcement, Norway (1998)

QuickLink to Products:  
Hughes Brothers, Inc.
Pultrall, Div. of ADS Composites Group

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