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Fatigue of CFRPs externally bonded to concrete

Ferrier, E. / Bigaud, D. / Hamelin, P. / Bizindavyi, L. / Neale, K. W.

Abstract The external bonding of fibre reinforced polymers (FRPs) to concrete beams is a particularly attractive rehabilitation technique for increasing or restoring the strength of existing reinforced concrete flexural members. The durability and the performance of FRP-strengthened structures subjected to cyclic loading depend directly on the fatigue behaviour of the FRP itself, as well as on that of the FRP-to-concrete interface. This paper aims at increasing the database on the fatigue behaviour of these types of reinforcement using two test set-ups developed in two distinct research laboratories. The primary purpose of this paper is to propose a methodology for the determination of the value of the allowable shear bond strength ($ f_{adh,v,u} $) and the tensile FRP strength ($ f_{f,u} $) as a function of the numbers of cycles of loading. Results from an experimental investigation on the cyclic behaviour of single-lap and double-lap CFRP-concrete joints are reported. For both types of test set-up, the cyclic bond stress-slip relations are presented and discussed. Analytical S-N relations (cyclic stress range vs. the number of cycles to failure) are proposed.

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Fatigue of CFRPs externally bonded to concrete

Ferrier, E. / Bigaud, D. / Hamelin, P. / Bizindavyi, L. / Neale, K. W.

Abstract The external bonding of fibre reinforced polymers (FRPs) to concrete beams is a particularly attractive rehabilitation technique for increasing or restoring the strength of existing reinforced concrete flexural members. The durability and the performance of FRP-strengthened structures subjected to cyclic loading depend directly on the fatigue behaviour of the FRP itself, as well as on that of the FRP-to-concrete interface. This paper aims at increasing the database on the fatigue behaviour of these types of reinforcement using two test set-ups developed in two distinct research laboratories. The primary purpose of this paper is to propose a methodology for the determination of the value of the allowable shear bond strength ($ f_{adh,v,u} $) and the tensile FRP strength ($ f_{f,u} $) as a function of the numbers of cycles of loading. Results from an experimental investigation on the cyclic behaviour of single-lap and double-lap CFRP-concrete joints are reported. For both types of test set-up, the cyclic bond stress-slip relations are presented and discussed. Analytical S-N relations (cyclic stress range vs. the number of cycles to failure) are proposed.

Fatigue of CFRPs externally bonded to concrete

Ferrier, E. / Bigaud, D. / Hamelin, P. / Bizindavyi, L. / Neale, K. W.

Abstract The external bonding of fibre reinforced polymers (FRPs) to concrete beams is a particularly attractive rehabilitation technique for increasing or restoring the strength of existing reinforced concrete flexural members. The durability and the performance of FRP-strengthened structures subjected to cyclic loading depend directly on the fatigue behaviour of the FRP itself, as well as on that of the FRP-to-concrete interface. This paper aims at increasing the database on the fatigue behaviour of these types of reinforcement using two test set-ups developed in two distinct research laboratories. The primary purpose of this paper is to propose a methodology for the determination of the value of the allowable shear bond strength ($ f_{adh,v,u} $) and the tensile FRP strength ($ f_{f,u} $) as a function of the numbers of cycles of loading. Results from an experimental investigation on the cyclic behaviour of single-lap and double-lap CFRP-concrete joints are reported. For both types of test set-up, the cyclic bond stress-slip relations are presented and discussed. Analytical S-N relations (cyclic stress range vs. the number of cycles to failure) are proposed.

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Title:

Fatigue of CFRPs externally bonded to concrete

Contributors:

Ferrier, E. (author) / Bigaud, D. (author) / Hamelin, P. (author) / Bizindavyi, L. (author) / Neale, K. W. (author)

Published in:

Materials and Structures ; 38

Publication date:

2005

ISSN:

DOI:

https://doi.org/10.1007/BF02480573

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Concrete Beam , Fatigue Life , Fatigue Process , Fatigue , Average Shear Stress

Classification:

BKL: 56.45 Baustoffkunde / 51.30 Werkstoffprüfung, Werkstoffuntersuchung
Local classification TIB: 275/6500 / 250/6500

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