The analytical bond behaviour between reinforcing bars and reinforced concrete matrix is widely described in the technical literature. On the contrary, there are no analytical models for concrete reinforced with recycled steel fibre (from waste tires). The theoretical analysis discussed in this paper has been focused on the evaluation of suitable analytical models for such material in order to define, for the first time, valid design guidelines. For this purpose, were analysed the available data from a previous experimental campaign performed by the authors, in which eccentric pull-out tests were carried out, varying the type of concrete (plain, SFRC - Steel Fiber Reinforced Concrete, RSFRC – Recycled Steel Fiber Reinforced Concrete) and the ratio of concrete cover and bar diameter (c/d). Using these data, several analytical models were calibrated for plain concrete and SFRC, obtaining analytical formulations which allow to describe the bond stress-slip behaviour and to determine the peak bond stress and the post splitting stress for recycled fibre reinforced concrete.
Aderenza tra barra e matrice in calcestruzzi rinforzati con fibre d’acciaio riciclate
CENTONZE, GIUSEPPE;LEONE, Marianovella
2014-01-01
Abstract
The analytical bond behaviour between reinforcing bars and reinforced concrete matrix is widely described in the technical literature. On the contrary, there are no analytical models for concrete reinforced with recycled steel fibre (from waste tires). The theoretical analysis discussed in this paper has been focused on the evaluation of suitable analytical models for such material in order to define, for the first time, valid design guidelines. For this purpose, were analysed the available data from a previous experimental campaign performed by the authors, in which eccentric pull-out tests were carried out, varying the type of concrete (plain, SFRC - Steel Fiber Reinforced Concrete, RSFRC – Recycled Steel Fiber Reinforced Concrete) and the ratio of concrete cover and bar diameter (c/d). Using these data, several analytical models were calibrated for plain concrete and SFRC, obtaining analytical formulations which allow to describe the bond stress-slip behaviour and to determine the peak bond stress and the post splitting stress for recycled fibre reinforced concrete.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
