Studio Technica

Date: 13/5/2004

THE DESIGN OF EXTERNALLY BONDED REINFORCEMENT (EBR) FOR REINFORCED CONCRETE STRUCTURES BY MEANS OF FIBRE REINFORCED POLYMERS (FRP)

Dott. Ing. Giovanni Cerretini

Studio Technica (http://www.studiotechnica.net)
Via del Caravaggio, 43
50143 Firenze, Italia

Introduction

Today there are a lot of applications concerning fibre reinforced polymer (FRP) in civil engineering. The aim of this report is to study the externally bonded FRP reinforcement for reinforced concrete structures applied to the flexural strengthening. FRP reinforcements are joined to the structure by means of adhesives and they work therefore with a resistant mechanism based on the adhesion between the materials. Different fabrics and fibres are used to obtain FRP with the following properties: high resistance of the materials; low specific weight that not modify the total weight of the structure; small thickness that not modify the volumes; the possibility to design a reinforcing material with specific mechanical property, optimised for its particular stress distribution. This paper presents a software that has been developed on the basis of the FIB Bulletin 14 [1] Specifications (based on Eurocode 2 [2]). This software is intended as a tool for the design of the reinforced section and a tool to evaluate which kind of FRP system is more convenient.

Keywords

Fiber, Reinforcement, Concrete, FRP

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References

[1] Task Group 9.3, Externally bonded FRP reinforcement for RC structures, fib CEB-FIP Bulletin 14, Switzerland, 2001

[2] CEN, Eurocode 2 - Design of concrete structures ENV1992-1-1, Brussels - Belgium, 1991

[3] ACI Committee 440, ACI 440.2R-02 Guide for the Design and Construction of Externally Bonded FRP systems for Strengthening Concrete Structures, USA, 2002

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