Design Guidelines and Standards

There are a number of authoritative consensus design guidelines for the designer to follow. Generally the design methodology for FRP reinforced concrete members follows that of steel reinforcing but taking into account the linear elastic or non-ductile nature of the material with different safety factors. Care is taken to avoid the possibility of a balance failure mode where concrete crushing and rupture of the bar could occur simultaneously. The designer must choose between compression failure of concrete, which is the preferred mode, and rupture of the FRP bar with a higher factor of safety.
The use of a consensus design method, rather than a proprietary derivation from existing design methodologies, helps protect the engineer of record and allows for multiple bidders for a given project.

Our Services

Aslan FRP is NOT a design engineering firm. However, to aid the designer who is unfamiliar, or new to, FRP design guides and standards, we do provide engineering assistance. Our staff of engineers are intimately involved in the authorship of the various design guides, standard and test methods and are available to help with your specific project.
We will NOT stamp designs, rather we are here to "compliment" your efforts for a successful implementation of Aslan FRP bars.
Using industry standard consensus design methods, we will furnish you with a design proposal based on the inputs you provide us. Hughes Brothers will not perform any structural analysis and our scope is limited to design advice only to the engineer of record concerning implementation of Aslan FRP bars.
To assist you, our staff needs a clear understanding of:
  • Geometry of the concrete member -- electronic or CAD drawings are most helpful
  • Moment and shear forces the member is subject to
  • Concrete strengths

How to design with Aslan 100 GFRP bars

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ACI committee 440 is the most authoritative and prolific consensus standards body involved in the publication of design guidelines for the use of FRP bars.
The Aslan FRP team has been an active participant in 440 committee activities since 1994. Committee 440 documents are based on research performed world-wide.

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    ACI 440.1R

    Design with Aslan 100 GFRP bars is dictated by ACI 440.1R-15, "Guide for the Design and Construction of Structural Concrete Reinforced with FRP Bars".
    A fourth iteration of the document, can be purchased from the ACI International bookstore. This document and all other ACI 440 publications are included in the "Manual of Concrete Practice" which many engineering firms obtain.

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    AASHTO

    In November 2009, AASHTO published "AASHTO LRFD Bridge Design Guide Specifications for GFRP Reinforced Concrete Decks and Traffic Railings including a Commentary" based on the work of committee T-6.This document gives the American bridge design community some conservative guidelines for implementation of GFRP rebar in decks and railings.

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    CSA S806 & S-6

    The Canadian Highway Bridge Design Code, CSA-S6-06, adopted provisions for the use of FRP bars in 2006. As a result of this, many bridges and parapets in Canada are being built using FRP bars. The Canadian equivalent of ACI 440.1! is the CSA S806 design guideline.

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    FIB

    In Europe, the Federation Internationale du Beton FIB Task Group 9.3 has published a technical report "Bulletin 40", which is a "state of the art" of FRP reinforcement in RC structures. Work is under way on provisions for FRP bars in EuroCode 2 format. Norway and Italy have published internal design codes for the use of FRP bars.

Test Methods for FRP Bars

ASTM Committee D.30 in parallel with ACI committee 440 have published a complete set of test methods pertaining specifically to FRP Bars. Originally these test methods were published in the ACI document 440.3R-04 "Guide Test Methods for Fiber Reinforced Polymers for Reinforcing or Strengthening Concrete Structures". ASTM committee D30 is transitioning the 440 test methods and much of this work is nearing completion. Test methods for Aslan FRP materials are as follows:
ASTM D7205/D7205M Standard Test Method for Tensile Properties of Fiber Reinforced Polymer Matrix Composite Bars
D7617/D7617M Standard Test Method for Transverse Shear Strength of Fiber Reinforced Polymer Matrix Composite Bars
D7705/D7705M Standard Test Method for Alkali Resistance of Fiber Reinforced Polymer (FRP) Matrix Composite Bars used in Concrete Construction
D7913/D7913M Standard Test Method for Bond Strength of Fiber-Reinforced Polymer Matrix Composite Bars to Concrete by Pullout Testing
D7914/D7914M Standard Test Method for Strength of Fiber-Reinforced Polymer (FRP) Bent Bars in Bend Locations
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