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Dynamic behavior of reinforced concrete beams strengthened with composite materials

Hamed, E. / Rabinovitch, O.

In this paper, the dynamic behavior of RC beams strengthened with externally bonded FRP strips is analytically investigated. The main goal of the paper is to quantitatively describe and explore the dynamic behavior of the strenghened RC beam. To achieve this goal, an analytical model for the dynamic behavior of the strengthened RC beam is developed. The model uses variational principles, dynamic equilibrium, and compatibility requirements between the structural components. The response of a strengthened beam to three types of dynamic loads that include impulse load, harmonic load, and a seismic base excitation has been numerically investigated. One phenomenon that has been observed is the variation of the location of the peak shear stresses in the adhesive layer along the beam through the time domain. This effect is unique to the dynamic response of the beam and is not observed in static cases. Attention should also be drawn to the development of compressive forces in the FRP strip due to the dynamic sign reversing response of the strengthened beam. These compressive forces may lead to local buckling or wrinkling of the FRP composite and affect its load carrying capacity, and its modes of failure.

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Dynamic behavior of reinforced concrete beams strengthened with composite materials

Hamed, E. / Rabinovitch, O.

In this paper, the dynamic behavior of RC beams strengthened with externally bonded FRP strips is analytically investigated. The main goal of the paper is to quantitatively describe and explore the dynamic behavior of the strenghened RC beam. To achieve this goal, an analytical model for the dynamic behavior of the strengthened RC beam is developed. The model uses variational principles, dynamic equilibrium, and compatibility requirements between the structural components. The response of a strengthened beam to three types of dynamic loads that include impulse load, harmonic load, and a seismic base excitation has been numerically investigated. One phenomenon that has been observed is the variation of the location of the peak shear stresses in the adhesive layer along the beam through the time domain. This effect is unique to the dynamic response of the beam and is not observed in static cases. Attention should also be drawn to the development of compressive forces in the FRP strip due to the dynamic sign reversing response of the strengthened beam. These compressive forces may lead to local buckling or wrinkling of the FRP composite and affect its load carrying capacity, and its modes of failure.

Dynamic behavior of reinforced concrete beams strengthened with composite materials

Hamed, E. / Rabinovitch, O.

In this paper, the dynamic behavior of RC beams strengthened with externally bonded FRP strips is analytically investigated. The main goal of the paper is to quantitatively describe and explore the dynamic behavior of the strenghened RC beam. To achieve this goal, an analytical model for the dynamic behavior of the strengthened RC beam is developed. The model uses variational principles, dynamic equilibrium, and compatibility requirements between the structural components. The response of a strengthened beam to three types of dynamic loads that include impulse load, harmonic load, and a seismic base excitation has been numerically investigated. One phenomenon that has been observed is the variation of the location of the peak shear stresses in the adhesive layer along the beam through the time domain. This effect is unique to the dynamic response of the beam and is not observed in static cases. Attention should also be drawn to the development of compressive forces in the FRP strip due to the dynamic sign reversing response of the strengthened beam. These compressive forces may lead to local buckling or wrinkling of the FRP composite and affect its load carrying capacity, and its modes of failure.

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Title:

Dynamic behavior of reinforced concrete beams strengthened with composite materials

Additional title:

Dynamisches Verhalten von mit Verbundwerkstoffen verstärkten Stahlbetonträgern

Contributors:

Hamed, E. (author) / Rabinovitch, O. (author)

Published in:

Journal of Composites for Construction ; 9 ; 429-440

Publication date:

2005

Size:

12 Seiten, 6 Bilder, 36 Quellen

ISSN:

DOI:

https://doi.org/10.1061/(ASCE)1090-0268(2005)9:5(429)

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Träger (Bauwesen) , Stahlbeton , mechanische Verstärkung , faserverstärkter Kunststoff , dynamisches Verhalten , Haftfestigkeit , mathematisches Modell , Umhüllung , Klebverbindung , dynamische Belastung , Scherspannung , Druckspannung , Knicken , Faltenbildung (Blech)

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