FIB Bulletin

From the variations of the equations given in the literature, e.g. fib-bulletin-14 (2001), ISIS-Canada (2001), ACI-440.2R-02 (2002), Teng et al (2002), CNR (2004), SIA166 (2004), TR55 (2004), it can be seen that debonding is a complex failure mode that is not yet fully understood. 

Possible limits of the shear stress can be found respectively in SIA166 (2004),SIA262 (2003), Aram efai (2008a), TR55 (2004) and fib-bulletin-14 (2001) as ... 

Aside from the verification of the strains (stresses), the determination of the deflection and crack width might be of interest. The deflections can be determined through a double integration of the curvature, which can also be determined using the cross-section analysis (Rg. 4.16). For calculation of the crack width, see fib-bulletin-14 (2001). 

To ensure enough ductility of the strengthened structure at failure, fib-bulletin-14 (2001) gives limitations for the minimum strain in the internal reinforcement ... 

To consider these effects, confinement effectiveness coefficients can be found in the literature (fib-bulletin-14 2001). 

In the commonest applications, the reinforcement of concrete members, FRP bars are used in roughly the same way as conventional steel bars for both handling and placement operations. Several documents (e.g. ACI 440.1R-06 (ACI Committee 440, 2006), FIB Bulletin 40 (FIB, 2007) and CAN/CSA... 

NSM), CFRP strips (or bars) are installed into a slot that is saw-cut to the surface of the element to be strengthened and hlled with epoxy adhesive or mortar. Several documents (e.g. ACI 440.2R-08 (ACI Committee 440,2008), FIB Bulletin 14 (FIB, 2001) and CAN/CSA S806-02 (CSA, 2002)) provide detailed guidance on the application of FRP strengthening systems. 

Bogas, J. A. and Gomes, A. (2008), Analysis of the CFRP flexural strengthening reinforcement approaches proposed in fib bulletin 14 , Construction and Building Materials, Issue Vol. 22, 10, pp. 2130-2140. 

FIB (2001). Externally bonded FRP reinforcement for RC structures. Design and use of externally bonded fibre reinforced polymer reinforcement (FRP EBR) for reinforced concrete structures (FIB Bulletin No. 14). Lausanne Federation Internationale du... 

FIB (2009). Structural Concrete Textbook on behaviour, design and performance. Volume 1 - Design of concrete structures, conceptual design, materials (FIB Bulletin No. 51). Lausanne Federation Internationale du Beton (FIB). 

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