Analysis of Deflections of Bridge Girders Strengthened by Carbon Fibre Reinforcement

Tomas Skuturna; Juozas Valivonis; Povilas Vainiūnas; Gediminas Marčiukaitis; Mykolas Daugevičius

doi:10.3846/1822-427X.2008.3.145-151

Analysis of Deflections of Bridge Girders Strengthened by Carbon Fibre Reinforcement

Authors

Tomas Skuturna Dept of Reinforced Concrete and Masonry Structures, Vilnius Gediminas Technical University, Saulėtekio al. 11, 10223 Vilnius, Lithuania
Juozas Valivonis Dept of Reinforced Concrete and Masonry Structures, Vilnius Gediminas Technical University, Saulėtekio al. 11, 10223 Vilnius, Lithuania
Povilas Vainiūnas Dept of Reinforced Concrete and Masonry Structures, Vilnius Gediminas Technical University, Saulėtekio al. 11, 10223 Vilnius, Lithuania
Gediminas Marčiukaitis Dept of Reinforced Concrete and Masonry Structures, Vilnius Gediminas Technical University, Saulėtekio al. 11, 10223 Vilnius, Lithuania
Mykolas Daugevičius Dept of Reinforced Concrete and Masonry Structures, Vilnius Gediminas Technical University, Saulėtekio al. 11, 10223 Vilnius, Lithuania

DOI:

https://doi.org/10.3846/1822-427X.2008.3.145-151

Keywords:

external carbon fibre reinforcement, strengthening, bridge beams, deflections

Abstract

The paper deals with experimental and theoretical investigations in reinforced concrete structures strengthened with carbon fibre sheets. Four stages in the behaviour of concrete structures strengthened with the carbon fibre reinforced polymer (CFRP) are distinguished. A method for calculating the deflections of such structures is presented. The design procedure for defining the strength of the structures evaluates the stiffness of the contact between the carbon fibre and the concrete. Experimental investigations with different fastening methods of the CFRP to the concrete were performed. In experimental investigations deflections of the strengthened members have been examined. Results of the calculations of deflections for experimental beams according to the proposed method are presented. A comparison of experimental and theoretical deflections is presented in the paper.

References

Buyukozturk, O.; Gunes, O.; Karaca, E. 2004. Progress on understanding debonding problems in reinforced concrete and steel members strengthened using FRP composites, Construction and Building Materials 18(1): 9–19.

Charkas, H.; Rasheed, H. A.; Melhem, H. 2003. Rigorous procedure for calculating deflections of fiber-reinforced polymer–strengthened reinforced concrete beams, ACI Structural Journal 100(4): 529–539.

Colotti, V.; Spadea, G.; Swamy, R. N. 2004. Structural Model to Predict the Failure Behaviour of Plated Reinforced Concrete Beams, Journal of Composites for Construction 8(2): 104–122.

Faruqi, M.; Wu, C. C.; Benson, F. 2003. Development of deflection equations using moment–curvature relationships for reinforced concrete beams strengthened with fibre–reinforced polymer (CFRP) plates, Magazine of Concrete Research 55(6): 549–557.

Gribniak, V.; Kaklauskas, G.; Bačinskas, D. 2008. Shrinkage in reinforced concrete structures: a computational aspect, Journal of Civil Engineering and Management 14(1): 49–60.

Hag-Elsafi, O.; Alampalli S.; Kunin, J. 2001. Application of FRP laminates for strengthening of a reinforced-concrete T-beam bridge structure, Composite Structures 52(3–4): 453–466.

Hag-Elsafi, O.; Alampalli S.; Kunin, J. 2004. In-service evaluation of a reinforced concrete T-beam bridge FRP strengthening system, Composite Structures 64(2): 179–188.

Hassanen, M. A. H.; Raoof, M. 2001. Design against premature peeling failure of RC beams with externally bonded steel or CFRP plates, Magazine of Concrete Research 53(4): 251–262.

Kamaitis, Z. 2006. Deterioration of bridge deck roadway members. Part I: site investigations, The Baltic Journal of Road and Bridge Engineering 1(4): 177–184.

Kaminski, M.; Trapko, T. 2006. Experimental behaviour of reinforced concrete column models strengthened by CFRP materials, Journal of Civil Engineering and Management 12(2): 109–115.

Labossiere, P.; Neale, K. W.; Rochette, P.; Demers, M.; Lamothe, P.; Lapierre, P.; Desgagne, G. 2000. FRP strengthening of the Sainte-Emelie-de-l Energie bridge: design, instrumentation and field testing, Canadian Journal of Civil Engineering 27(5): 916–927.

Marchukaitis, G.; Valivonis, Yo.; Bareishis, J. 2007. An analysis of the joint operation of a CFRP concrete in flexural elements, Mechanics of Composite Materials 43(5): 467–478.

Oehlers, D. J. 2001. Development of design rules for retrofitting by adhesive bonding or bolting either FRP or steel plates to RC beams or slabs in bridges and buildings, Composites Part A: Applied Science and Manufacturing 32(9): 1345–1355.

Ramos, G.; Casas, J. R.; Alarcon, A. 2004. Repair and strengthening of segmental bridges using carbon fibers, Engineering Structures 26(5): 609–618.

Valivonis, J. 2006. Analysis of behaviour of contact between the profiled steel sheeting and the concrete, Journal of Civil Engineering and Management 12(3): 187–194.

Valivonis, J.; Skuturna, T. 2007. Cracking and strength of reinforced concrete structures in flexure strengthened with carbon fibre laminates, Journal of Civil Engineering and Management 13(4): 317–323.

Van Den Einde, L.; Zhao L.; Seible, F. 2003. Use of FRP composites in civil structural applications, Construction and Building Materials 17(6–7): 389–403.

Xiong, G. J.; Jiang, X.; Liu, J. W.; Chen, L. 2007. A way for preventing tension delamination of concrete cover in midspan of FRP strengthened beams, Construction and Building Materials 21(2): 402–408.

Купляускас, Р.; Ноткус, А. 1987. Экспериментальные исследования полной диаграммы растяжения бетона [Kupliauskas, P.; Notkus, A. Experimental research of complete stress-strain diagram for concrete in direct tension], Железобетонные конструкции [Concrete Structures] 15: 83–89.

Ржаницын, А. Р. 1986. Составные стержни и пластинки [Rzhanicin, A. Built-up bars and plates]. Москва: Стройиздат. 316 с.