The addition of fibers into concrete determines a cracking phenomenon characterized by narrower and more closely spaced cracks, with respect to similar members without fibers. As a consequence, Fiber Reinforced Concrete (FRC) may significantly improve the tension stiffening into the undamaged portions of concrete among cracks, and, in addition, may provide noticeable residual stresses at a crack, linking the two adjacent faces of any crack due to the bridging effect provided by its enhanced toughness. Within this framework, this paper aims to investigate, by means of non-linear numerical analyses, the cracking process of concrete members reinforced by a combination of conventional steel rebars and fibrous reinforcement. An existing constitutive numerical model, named 2D-PARC, was properly applied in order to better evaluate the typical local resistant mechanisms involved in concrete cracking phenomena by including fibers' resistant contribution.
Non-linear analyses and cracking process of FRC tension ties
MINELLI, Fausto;TIBERTI, Giuseppe
2014-01-01
Abstract
The addition of fibers into concrete determines a cracking phenomenon characterized by narrower and more closely spaced cracks, with respect to similar members without fibers. As a consequence, Fiber Reinforced Concrete (FRC) may significantly improve the tension stiffening into the undamaged portions of concrete among cracks, and, in addition, may provide noticeable residual stresses at a crack, linking the two adjacent faces of any crack due to the bridging effect provided by its enhanced toughness. Within this framework, this paper aims to investigate, by means of non-linear numerical analyses, the cracking process of concrete members reinforced by a combination of conventional steel rebars and fibrous reinforcement. An existing constitutive numerical model, named 2D-PARC, was properly applied in order to better evaluate the typical local resistant mechanisms involved in concrete cracking phenomena by including fibers' resistant contribution.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
