Drop-Weight Impact Test for Fibre Reinforced Concrete: Analysis of Test Configuration

VIVAS, JUAN CARLOS; ISLA CALDERÓN, FACUNDO ANDRÉS; TORRIJOS, MARÍA CELESTE; GIACCIO, GRACIELA; LUCCIONI , BIBIANA MARÍA; ZERBINO, RAÚL

Fibre Reinforced Concrete: Improvements and Innovations II

Springer

Lugar: Valencia; Año: 2022; p. 61 - 73

Abstract. Impact resistance represents a key property of Fibre ReinforcedConcrete (FRC). Recently, the authors proposed a repeated drop-weight test forFRC impact characterization that, among other advantages, is able to distinguishthe contribution of different types and dosages of fibres both at cracking and incracked state. The impacts are applied on a simply supported notched prism of150 X 150 X 300 mm, being the adopted span length 240 mm, the notch depth25 mm and the projectile mass 5 kg. An experimental and numerical parametricalstudy was carried out in order to analyse the effect of the specimen geometry onimpact test results. The span length (240, 350 and 500 mm), the notch depth (10,25 and 50 mm), the specimen width (70, 100 and 150 mm), and the projectilemass (5, 10 and 20 kg) were considered as variables. The numerical model wasdeveloped to analyse the stress distribution before the first crack appears (elasticbehaviour). In order to corroborate the numerical model, the impact load wasmeasured in some tests with a dynamic load cell. Numerical results concerning theeffects of the above-mentioned variables on impact response are presented.