Shear behaviour in cracked concrete is still a matter of discussion into the scientific community. This paper reports on an experimental campaign which focused on the shear behaviour of pre-cracked concrete under direct shear. The push-off test with confined specimen is used to this aim. The influence of the granular skeleton (one mix with aggregate maximum size of20 mm, and the other with12 mm), concrete compressive strength (30 and 50 MPa), shear reinforcement (close stirrups, steel fibres or plain concrete) and the initial crack width (fixedin two levels: low (0 mm) and high (1mm)) are studied. Results show that the reinforcement transmits shear stress up to a slip of 0.4 mm (for uncon-fined specimens), and1 mm (for confined ones). After that, macro roughness and confinement force are the mechanisms which transmit shear stress.
Influence of the fiber reinforcement in concrete under direct shear
Cuenca Asensio Estefania;
2014-01-01
Abstract
Shear behaviour in cracked concrete is still a matter of discussion into the scientific community. This paper reports on an experimental campaign which focused on the shear behaviour of pre-cracked concrete under direct shear. The push-off test with confined specimen is used to this aim. The influence of the granular skeleton (one mix with aggregate maximum size of20 mm, and the other with12 mm), concrete compressive strength (30 and 50 MPa), shear reinforcement (close stirrups, steel fibres or plain concrete) and the initial crack width (fixedin two levels: low (0 mm) and high (1mm)) are studied. Results show that the reinforcement transmits shear stress up to a slip of 0.4 mm (for uncon-fined specimens), and1 mm (for confined ones). After that, macro roughness and confinement force are the mechanisms which transmit shear stress.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
