The debonding mode of failure, which is observed in concrete beams strengthened using externally attached FRP sheets, is analyzed. A numerical analysis of the direct-shear response of FRP attached to a concrete substrate is performed to study the initiation, formation and propagation of an interfacial crack between the two adherents. The material response of the bi-material interface, which includes post-peak softening, is considered in the numerical model. An instability in the load response associated with snap-back is predicted close to failure and the arc-length method is used to obtain the entire load response. It is shown that there is a scaling in the load capacity when the bonded length does not allow for the establishment of the full stress-transfer zone associated with interface crack growth.

K.V. Subramaniam, M. Ali-Ahmad, C. Carloni (2006). Geometric Scaling and Instability in FRP-Concrete Debonding. DORDRECHT : Springer.

Geometric Scaling and Instability in FRP-Concrete Debonding

CARLONI, CHRISTIAN
2006

Abstract

The debonding mode of failure, which is observed in concrete beams strengthened using externally attached FRP sheets, is analyzed. A numerical analysis of the direct-shear response of FRP attached to a concrete substrate is performed to study the initiation, formation and propagation of an interfacial crack between the two adherents. The material response of the bi-material interface, which includes post-peak softening, is considered in the numerical model. An instability in the load response associated with snap-back is predicted close to failure and the arc-length method is used to obtain the entire load response. It is shown that there is a scaling in the load capacity when the bonded length does not allow for the establishment of the full stress-transfer zone associated with interface crack growth.
2006
Fracture of Nano and Engineering Materials and Structures
K.V. Subramaniam, M. Ali-Ahmad, C. Carloni (2006). Geometric Scaling and Instability in FRP-Concrete Debonding. DORDRECHT : Springer.
K.V. Subramaniam; M. Ali-Ahmad; C. Carloni
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/43488
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