Analiza efektywności wzmacniania stref przypodporowych belek żelbetowych wykonanego za pomocą wklejania materiałów kompozytowych

• Autorzy: Kotynia, R.

Warianty tytułu

EN

Analysis of effectiveness of NSM FRP shear strengthened beams

• Języki publikacji: PL

Abstrakty

PL

Praca dotyczy wzmacniania stref przypodporowych belek żelbetowych materiałami kompozytowymi CFRP, wklejanymi w bruzdy wykonane w betonowej otulinie tych elementów. Przedstawiono szczegółowy stan wiedzy w dziedzinie doświadczalnych badań elementów wzmocnionych na ścinanie tą metodą oraz przeprowadzono analizę efektów wzmocnienia w aspekcie wielu parametrów zmiennych.

EN

The present work analyzes the effectiveness of the near-surface mounted [NSM) fiber reinforced polymers (FRP) technique for shear strengthening of reinforced concrete (RC) beams and provides the review of existing research in this area. Based on published test results, the paper provides a comparative study of the failure modes, FRP strain efficiency and shear strength enhancement. The influence of the following parameters: beams dimensions, internal shear steel reinforcement ratio, type, inclination and ratio of the NSM FRP reinforcement, FRP bars spacing and concrete strength is discussed in the paper.

Słowa kluczowe

PL

belka żelbetowa; materiały kompozytowe

EN

reinforced concrete beam; composite materials

• Czasopismo: Zeszyty Naukowe. Budownictwo / Politechnika Łódzka
• Rocznik: 2009
• Tom: Z. 60
• Strony: 17-37
• Opis fizyczny: Bibliogr. 12 poz.

Twórcy

autor

Kotynia, R.

• Katedra Budownictwa Betonowego Politechniki Łódzkiej

Bibliografia

• [1] Kotynia R., Kaminska, M.E.: Ductility and failure mode of RC beams strengthened for flexure with CFRP. Report No. 13, Department of Concrete Structures, Technical University of Lodz, 2003, pp. 51.
• [2] Barros J.A.O. and Fortes A.S.: Flexural strengthening of concrete beams with CFRP laminates bonded into slits. Cement & Concrete Composites, 27, 2005, pp. 471-480.
• [3] Kotynia R.: Analysis of reinforced concrete beams strengthened with near surface mounted FRP reinforcement. Archives of Civil Engineering, LII 2, 2006, pp. 305-317.
• [4] El-Hacha R. and Rizkalla S.: Near-Surface-Mounted Fiber-Reinforced Polymer Reinforcements for Flexural Strengthening of Concrete Structures. ACT Structural Journal, Vol. 101, No. 5, 2004, pp. 717-726.
• [5] Chen J.F. and Teng J.G.: Shear capacity of FRP-strengthened RC beams: FRP debonding. Construction and Building Materials 17, 2003, pp. 27-41.
• [6] Rizzo A. and De Lorenzis L.: Behaviour and capacity of RC beams strengthened in shear with NSM FRP reinforcement. Construction and Building Materials, 23, 2009 pp. 1555-1567.
• [7] Barros J.A.O. and Dias S.J.E.: Near surface mounted CFRP laminates for shear strengthening of concrete beams. Journal Cement and Concrete Composites, 28 (3) 2006, pp. 276-292.
• [8] De Lorenzis L. and Nanni A.: Shear Strengthening of Reinforced Concrete Beams with Near-Surface Mounted Fiber-Reinforced Polymer Rods. ACI Structural Journal 98(1), 2001, pp. 60-68.
• [9] Dias S.J.E. and Barros J.A.O.: Shear strengthening of T cross section reinforced concrete beams by near surface mounted technique, Journal of Composites for Construction, 12(3), 2008, pp. 300-311.
• [10] Dias S.J.E., Bianco V., Barros J.A.O. and Monti G.: Low strength T-cross section RC beams shear-strengthened by NSM technique, Proc. of Materiali ed Approcci Innovativi per il Progetto in Zona Sismica e la Mitigazione della Vulnerabilita delle Strutture, 2007, CD.
• [11] Dias S.J.E. and Barros J.A.O.: Performance of reinforced concrete t beams strengthened in shear with NSM CFRP. Engineering Structures. In print.
• [12] Kotynia R.: Shear strengthening of RC beams with NSM CFRP laminates. Proc. of FRPRCS-8 Int. Symp. on Fiber Reinforced Polymer Reinforcement for Concrete Structures, Patras, Greece, 2007, CD.