Ultimate Response of RC Beams Strengthened with CFRP Plates
Publication: Journal of Composites for Construction
Volume 5, Issue 2
Abstract
Poststrengthening and retrofitting is a growing reality, as existing structures are required to meet the demands of modern society. Apart from the need to increase load capacity, upgrading of a structure may be necessitated through deterioration of the structure by corrosion or accidental damage, a change in the structural system, or to rectify initial design and construction faults. A commonly observed mode of failure for beams strengthened using carbon-fiber-reinforced polymer composite material plates is one due to the plate peeling off prematurely and unpredictably at relatively low magnitudes of applied loading. End plate anchorages and long unanchored plate lengths, which can add significantly to the overall cost of a strengthening solution, overcome this problem. This paper presents the results of flexural tests on ten reinforced concrete beams strengthened with different plate configurations. A strain compatibility and force equilibrium method of analysis, coupled with an empirical rule derived from the test data, is demonstrated to be effective in predicting the ultimate response of simply supported beams in bending with and without end plate anchorages and irrespective of plate length.
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References
1.
Ahmed, O., and Van Gemert, D. ( 1999). “Behaviour of RC beams strengthened in bending by CFRP laminates.” Proc., 8th Int. Conf. on Struct. Faults and Repairs, Engineering Technics Press, Edinburgh, U.K.
2.
Alampalli, S., and Yannotti, A. P. ( 1999). “Extending life of bridges using FRP composites.” Proc., 8th Int. Conf. on Struct. Faults and Repairs, Engineering Technics Press, Edinburgh, U.K.
3.
Barboni, M., Beneditti, A., and Nanni, A. (1997). “Carbon FRP strengthening of doubly curved precast PC shell.”J. Compos. for Constr., ASCE, 1(4), 168–174.
4.
Barton, R. ( 1997). “The engineering of adhesives for external reinforcement of bridges and buildings.” Proc., 7th Int. Conf. on Struct. Faults and Repairs, Engineering Technics Press, Edinburgh, U.K., 1, 277–292.
5.
Emmons, P. H., Vaysburd, A. M., and Thomas, J. ( 1998). “Strengthening concrete structures. Part 1.” ACI Concrete Int., March, 53–58.
6.
Fanning, P., and Kelly, O. ( 2000). “Smeared crack models of RC beams with externally bonded CFRP plates.” J. Computational Mech., 26(4), 325–332.
7.
Hong He, J., Pilakoutas, K., and Waldron, P. ( 1997). “CFRP plate strengthening of RC beams.” Proc., 7th Int. Conf. on Struct. Faults and Repairs, Engineering Technics Press, Edinburgh, U.K., 1, 119–127.
8.
Hutchinson, A. R., and Rahimi, H. ( 1993). “Behaviour of reinforced concrete beams with externally bonded fibre reinforced plastics.” Proc., 5th Int. Conf. on Struct. Faults and Repairs, Engineering Technics Press, Edinburgh, U.K., 221–228.
9.
Kelly, O. ( 1999). “Strengthening of reinforced concrete beams using CFRP composite materials.” MS thesis, National University of Ireland, Dublin, Ireland.
10.
Meier, U. ( 1996). “Advanced composite for structural repair: European perspective.” Recent advances in bridge engineering, J. R. Casas, F. W. Klaiber, and A. R. Mari, eds., CMINE, Barcelona, Spain, 491–504.
11.
Nanni, A. ( 1995). “Concrete repair with externally bonded FRP reinforcement: examples from Japan.” ACI Concrete Int., June, 22–26.
12.
Oehlers, D. J., Mohamed Ali, M. S., and Luo, W. (1998). “Upgrading continuous reinforced concrete beams by gluing steel plates to their tension faces.”J. Struct. Engrg., ASCE, 124(3), 224–232.
13.
Oehlers, D. J., and Moran, J. P. (1990). “Premature failure of externally plated reinforced concrete beams.”J. Struct. Engrg., ASCE, 116(4), 978–995.
14.
Ritchie, P. A., Thomas, D. A., Lu, L. W., and Connelly, G. M. ( 1991). “External reinforcement of concrete beams using fiber reinforced plastics.” ACI Struct. J., 88(4), 490–500.
15.
Spadea, G., Bencardino, F., and Swamy, R. N. (1998). “Structural behavior of composite RC beams with externally bonded CFRP.”J. Compos. for Constr., ASCE, 2(3), 132–137.
16.
Swamy, R. N., Jones, R., and Bloxham, J. M. ( 1987). “Structural behaviour of reinforced concrete beams strengthened by epoxy-bonded steel plates.” The Struct. Engr., London, 65A(2), 59–68.
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Received: Sep 16, 1999
Published online: May 1, 2001
Published in print: May 2001
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