As is well-known, the addition of fibres to concrete mix (Fibre Reinforced Concrete, FRC) produces a positive effect on cracking behaviour. In this work, the results of an experimental campaign on FRC specimens with randomly distributed micro-synthetic polypropylene fibrillated fibres are examined. The tests concern single notched beams under three-point bending, where the fibre content varies. Such an experimental testing is numerically analysed through a non-linear finite element model, named 2D-PARC, where a proper constitutive law for fibre-reinforced concrete is implemented. The load-crack mouth opening displacement (CMOD) curves numerically obtained are employed to determine the critical stress-intensity factor (fracture toughness) for different values of fibre content, according to the two-parameter model. The comparison between such numerical results and those obtained by applying the two-parameter model to the experimental load-CMOD curves is performed.

Fracture toughness of fibre-reinforced concrete determined by means of numerical analysis / Bernardi, Patrizia; Michelini, Elena; Sirico, Alice; Vantadori, Sabrina; Zanichelli, Andrea. - In: PROCEDIA STRUCTURAL INTEGRITY. - ISSN 2452-3216. - 5:(2017), pp. 848-855. [10.1016/j.prostr.2017.07.090]

Fracture toughness of fibre-reinforced concrete determined by means of numerical analysis

Patrizia Bernardi;Elena Michelini;Alice Sirico;Sabrina Vantadori;Andrea Zanichelli
2017

Abstract

As is well-known, the addition of fibres to concrete mix (Fibre Reinforced Concrete, FRC) produces a positive effect on cracking behaviour. In this work, the results of an experimental campaign on FRC specimens with randomly distributed micro-synthetic polypropylene fibrillated fibres are examined. The tests concern single notched beams under three-point bending, where the fibre content varies. Such an experimental testing is numerically analysed through a non-linear finite element model, named 2D-PARC, where a proper constitutive law for fibre-reinforced concrete is implemented. The load-crack mouth opening displacement (CMOD) curves numerically obtained are employed to determine the critical stress-intensity factor (fracture toughness) for different values of fibre content, according to the two-parameter model. The comparison between such numerical results and those obtained by applying the two-parameter model to the experimental load-CMOD curves is performed.
Fracture toughness of fibre-reinforced concrete determined by means of numerical analysis / Bernardi, Patrizia; Michelini, Elena; Sirico, Alice; Vantadori, Sabrina; Zanichelli, Andrea. - In: PROCEDIA STRUCTURAL INTEGRITY. - ISSN 2452-3216. - 5:(2017), pp. 848-855. [10.1016/j.prostr.2017.07.090]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2838074
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