Shear Strengthening of RCT-Joints Using CFRP Composites
Publication: Journal of Composites for Construction
Volume 4, Issue 2
Abstract
The rehabilitation of RC columns jacketed with carbon fiber-reinforced plastic (FRP) composites for improving shear strength, confinement, and ductility has received considerable attention. However, research for improving the shear capacity of beam-column T-joints using FRP composite materials is still in the early stages. The present paper describes the experimental results of 14 1/3-scale tests of concrete beam-column joints. The variables considered were the composite system, the fiber orientation, and the surface preparation. The tests have demonstrated the viability of carbon FRP composites for their use in improving the shear capacity of the joints as evidenced by the experimental results. Based on these experimental results, a design aid was developed for T-joints with inadequate confinement and shear reinforcement.
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References
1.
Alcocer, S. M., and Jirsa, J. O. (1993). “Strength of reinforced concrete frame connections rehabilitated by jacketing.” ACI Struct. J., 90(3), 249–261.
2.
Biddah, A., Ghobarah, A., and Aziz, T. S. (1997). “Upgrading of nonductile reinforced concrete frame connections.”J. Struct. Engrg., ASCE, 123(8), 1001–1010.
3.
Chajes, M. J., Januszka, T. F., Mertz, D. R., Thomson, T. A., Jr. and Finch, W. W., Jr. (1994). “Shear strengthening of reinforced concrete beams using externally applied composite fabrics.” Res. Rep. No. CIEG94-1, University of Delaware, Newark, Del.
4.
Lowes, L. N., and Moehle, J. P. (1995). “Seismic behavior of retrofit of older reinforced concrete bridge T-joints.” Rep. No. UCB/EERC-95/09, University of California, Berkeley, Calif.
5.
Malek, A. M., and Saadatmanesh, H. (1998). “Ultimate shear capacity of RC beams strengthened with web bonded FRP plates.” ACI Struct. J., 95(4), 391–399.
6.
Nilsson, I. H. E., and Losberg, A. (1976). “Reinforced concrete corners and joints subjected to bending moment.”J. Struct. Div., ASCE, 102, 0102(ST6), 1229–1254.
7.
Pantelides, C. P., Gergely, J., Reaveley, L. D., and Volnyy, V. A. (1999). “Retrofit and test of R/C bridge piers with CFRP composites.”J. Struct. Engrg., ASCE, 125(10), 1094–1099.
8.
Prakash, V., Powell, G. H., and Filippou, F. C. (1992). “DRAIN-2DX Base Program User Guide.” Rep. No. UCB/SEMM-92/29, University of California, Berkeley, Calif.
9.
Priestley, M. J. N., Seible, F., and Calvi, G. M. (1996). Seismic design and retrofit of bridges. Wiley, New York.
10.
Priestley, M. J. N., Seible, F., MacRae, G. A., and Chai, Y. H. (1997). “Seismic assessment of the Santa Monica viaduct bent details.” ACI Struct. J., 94(5), 513–524.
11.
“Recommendations for design of beam-column joints in monolithic reinforced concrete structures.” (1991). ACI 352R-91, American Concrete Institute, Detroit.
12.
Saadatmanesh, H., Ehsani, M. R., and Jin, L. (1996). “Behavior of concrete columns retrofitted with fiber composite straps under cyclic loading.” Proc., 1st Int. Conf. on Compos. in Infrastructure, 842–856.
13.
Seible, F., Priestley, M. J. N., Innamorato, D., Weeks, J., and Policelli, F. (1994). “Carbon fiber jacket retrofit test of circular shear bridge column, CRC-2.” Rep. No. ACTT-94/02, University of California, San Diego.
14.
Seible, F., Priestley, M. J. N., Hegemier, G. A., and Innamorato, D. (1997). “Seismic retrofit of RC columns with continuous carbon fiber jackets.”J. Compos. for Constr., ASCE, 1(2), 52–62.
15.
Sun, Z., Seible, F., and Priestley, M. J. N. (1993). “Diagnostics and retrofit of rectangular bridge columns for seismic loads.” Rep. No. SSRP-93/07, University of California—San Diego, La Jolla, Calif.
16.
Triantafillou, T. C. (1998). “Shear strengthening of reinforced concrete beams using epoxy-bonded FRP composites.” ACI Struct. J., 95(2), 107–115.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 4 • Issue 2 • May 2000
Pages: 56 - 64
History
Received: Aug 10, 1998
Published online: May 1, 2000
Published in print: May 2000
Authors
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