Cracking behaviour of concrete beams reinforced with a combination of ordinary reinforcement and steel fibers

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Experiences in Barcelona with the use of fibres in segmental linings (2012, methodology): “The crack width (w) is evaluated differently depending on the type of reinforcement of the section: for RC sections the formulation proposed in (EC-2, 1992) is used, whereas in the case of SFRC-RC sections an extension of the previous formulation (Vandewalle, 2000) is used.”
Fibre‐reinforced concrete in fib Model Code 2010: principles, models and test validation (2013, background): “Several investigations are in progress to check the effectiveness of fibres in reducing crack distance and openings as suggested in fib Model Code 2010, with suitable relationships in agreement with conventional reinforced concrete [36, 37, 38].”
Fibre reinforced concrete: new design perspectives (2009, background): “Some studies are still needed for exposition classes since fibres may reduce the crack width [ 14 ]; therefore, for the exposition classes described in the EN 206 [15], different rules may be adopted in FRC structures (smaller concrete covers for instance).”