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Fatigue behavior of RC beams strengthened with GFRP sheets

Papakonstantinou, C.G. / Petrou, M.F. / Harries, K.A.

The objective of the presented study is to examine the effects of glass fiber reinforced polymer (GFRP) composite rehabilitation systems on the fatigue performance of reinforced concrete beams. Experiments were conducted on beams with and without GFRP composite sheets on their tensile surfaces. The specimens were 152 x 152 x 1,321 mm reinforced concrete beams with enough transverse reinforcement to avoid shear failure. The results of this study indicate that the fatigue life of reinforced concrete beams with the given geometry, subjected to the same cycling load, can be significantly extended through the use of externally bonded GFRP composite sheets. An interesting finding is that , although the fiber strengthening system increases the fatigue life of the beams, the failure mechanism, fatigue of the steel reinforcement, remains the same in both strengthened and nonstrengthened beams. Thus, it is possible to predict the fatigue life of a cyclically loaded beam using existing fatigue models.

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Fatigue behavior of RC beams strengthened with GFRP sheets

Papakonstantinou, C.G. / Petrou, M.F. / Harries, K.A.

The objective of the presented study is to examine the effects of glass fiber reinforced polymer (GFRP) composite rehabilitation systems on the fatigue performance of reinforced concrete beams. Experiments were conducted on beams with and without GFRP composite sheets on their tensile surfaces. The specimens were 152 x 152 x 1,321 mm reinforced concrete beams with enough transverse reinforcement to avoid shear failure. The results of this study indicate that the fatigue life of reinforced concrete beams with the given geometry, subjected to the same cycling load, can be significantly extended through the use of externally bonded GFRP composite sheets. An interesting finding is that , although the fiber strengthening system increases the fatigue life of the beams, the failure mechanism, fatigue of the steel reinforcement, remains the same in both strengthened and nonstrengthened beams. Thus, it is possible to predict the fatigue life of a cyclically loaded beam using existing fatigue models.

Fatigue behavior of RC beams strengthened with GFRP sheets

Papakonstantinou, C.G. / Petrou, M.F. / Harries, K.A.

The objective of the presented study is to examine the effects of glass fiber reinforced polymer (GFRP) composite rehabilitation systems on the fatigue performance of reinforced concrete beams. Experiments were conducted on beams with and without GFRP composite sheets on their tensile surfaces. The specimens were 152 x 152 x 1,321 mm reinforced concrete beams with enough transverse reinforcement to avoid shear failure. The results of this study indicate that the fatigue life of reinforced concrete beams with the given geometry, subjected to the same cycling load, can be significantly extended through the use of externally bonded GFRP composite sheets. An interesting finding is that , although the fiber strengthening system increases the fatigue life of the beams, the failure mechanism, fatigue of the steel reinforcement, remains the same in both strengthened and nonstrengthened beams. Thus, it is possible to predict the fatigue life of a cyclically loaded beam using existing fatigue models.

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Title:

Fatigue behavior of RC beams strengthened with GFRP sheets

Additional title:

Ermüdungsverhalten von mit glasfaserverstärkten Kunststoffplatten verstärkten Stahlbetonträgern

Contributors:

Papakonstantinou, C.G. (author) / Petrou, M.F. (author) / Harries, K.A. (author)

Published in:

Journal of Composites for Construction ; 5 ; 246-253

Publication date:

2001

Size:

8 Seiten, 11 Bilder, 1 Tabelle, 27 Quellen

ISSN:

DOI:

https://doi.org/10.1061/(ASCE)1090-0268(2001)5:4(246)

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Stahlbeton , Träger (Bauwesen) , Ermüdungslebensdauer , mechanische Verstärkung , Festigkeitserhöhung , glasfaserverstärkter Kunststoff , Platte (Bauteil) , Instandhaltung , zyklische Belastung , Kleben (Verbinden) , Versagensart , Vorhersage

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