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 mem-bers reinforced by a combination of conventional steel rebars and fibrous reinforcement. An existing constitu-tive numerical model, named 2D-PARC, was properly applied in order to better evaluate the typical local re-sistant mechanisms involved in concrete cracking phenomena by including fibers’ resistant contribution.
Non-linear analyses and cracking process of FRC tension ties / Bernardi, Patrizia; Michelini, Elena; F., Minelli; Sirico, Alice; G., Tiberti. - STAMPA. - 2:(2014), pp. 883-892. (Intervento presentato al convegno EURO-C 2014 tenutosi a St. Anton Am Arlberg, Austria nel 24-27 March 2014).
Non-linear analyses and cracking process of FRC tension ties
BERNARDI, Patrizia;MICHELINI, Elena;SIRICO, Alice;
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 mem-bers reinforced by a combination of conventional steel rebars and fibrous reinforcement. An existing constitu-tive numerical model, named 2D-PARC, was properly applied in order to better evaluate the typical local re-sistant 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.
