In this study, a simple method using a carbon fiber-reinforced polymer sheet for repairing concrete beam—column connection damaged by cyclic loading is presented. In this regard, cyclic loading was applied to the tip of the beam of two full-scale beam—column exterior connection specimens. The specimens’ features were accorded with seismic details suggested by the current reinforced concrete codes. At the last step of loading which was more than maximum design load (about 1.1 times), specified by the mentioned codes, many cracks were observed in the specimens. Only the cracks of the first specimen were epoxy injected. The results indicated that epoxy injection was not effective in restoring full strength of the specimen. The load-carrying capacities in positive and negative moment regions of the first and second repaired specimens were increased by about 17% and 32%, respectively, compared to the original ones.
Al-Salloum YA and Almusallam THSeismic response of interior RC beam-column joints upgraded with FRP sheets. I: experimental study. J Compos Constr2007; 11(6): 575-589.
2.
Ghobarah A. and El-Amoury T.Seismic rehabilitation of deficient exterior concrete frame joints . J Compos Constr2005; 9(5): 408-416.
3.
Geng Z., Chajes MJ, Chou T. and Pan DYC.The retrofitting of reinforced concrete column-to-beam connections . Compos Sci Technol1998; 58: 1297-1305.
4.
Pantelides CP , Clyde C., and Reaveley LDRehabilitation of R/C building joints with FRP composites. 12WCEE Auckland , New Zealand, Paper No. 2306, 2000.
5.
El-Amoury T. and Ghobarah A.Seismic rehabilitation of beam-column joints using CFRP sheets. J Struct Eng2002 ; 24(11): 1397-1407.
6.
Pantelides CP , Okahashi Y. and Reaveley LDSeismic rehabilitation of reinforced concrete frame interior beam-column joints with FRP composites . J Compos Struct2008; 12(4): 435-445.
7.
Prota A., Nanni A., Manfredi G. and Cosenza E.Selective upgrade of underdesigned reinforced concrete beam-column joints using carbon fiber-reinforced polymers. ACI Struct J2004; 101(5): 699-707.
8.
Antonopoulos CP and Triantafillou TCExperimental investigation of FRP-strengthened RC beam-column joints. J Compos Constr2003; 7(1): 39-49.
9.
Parvin A. and Granata P.Investigation on the effects of fiber composites at concrete joints . J Comp Part B-Eng2000; 31(6-7): 499-509.
10.
Granata PJ and Parvin A.An experimental study on kelvar strengthening of beam-column connection . J Compos Struct2001; 53(2): 163-171.
11.
Antonopoulos CP and Triantafillou TCAnalysis of FRP strengthened RC beam-column joints. J Compos Constr2002 ; 6(1): 41-51.
12.
Gergely J., Pantelides CP and Reaveley LDShear strengthening of RCT-joints using CFRP composites. J Compos Constr2000; 4(2): 5-64.
13.
Parvin A. and Wu S.Ply angle effect on fiber composite wrapped reinforced concrete beam-column connections under combined axial and cyclic loads. J Compos Struct2008; 82(4): 532-538.
14.
Tsonos AGEffectiveness of CFRP-jackets in post-earthquake and pre-earthquake retrofitting of beam-column subassemblages. Struct Eng Mech2007; 27(4): 393-408.
15.
Tsonos AGEffectiveness of CFRP-jackets and RC-jackets in post-earthquake and pre-earthquake retrofitting of beam-column subassemblages. Eng Struct2008; 30: 777-793.
16.
Tsonos AG and Stylianidis K.Seismic retrofit of beam-to-column joints with high-strength fiber jackets . J Eur Earthquake Eng2002; 16(2): 56-72.
17.
Karayannis CG and Sirkelis GMStrengthening and rehabilitation of RC beam-column joints using carbon-FRP jacketing and epoxy resin injection . Earthquake Eng Struct Dyn2008; 37(5): 769-790.
18.
Gencoglu M. and Mobasher B.The strengthening of the deficient RC exterior beam-column joints using CFRP for seismic excitation. In: Zingoni A (ed.) International Conference on Structural Engineering, Mechanics and Computation , Cape Town (ZA), 2007, pp.1993-1998.
19.
American Concrete Institute (ACI).State-of-the art report on fiber reinforced plastic (FRP) reinforcement for concrete structures, ACI Committee 440, ACI 440 R-02. Michigan, USA: ACI, 1996.
20.
Arya C., Clarke JL, Kay EA and O’Regan PDTR 55: Design guidance for strengthening concrete structures using fiber composite materials: A review. J Struct Eng2002; 24(7): 889-900.
21.
Teng JG, Chen JF, Smith ST and Lam L.FRP strengthened RC structures. New York: John Wiley & Sons, 2002.
22.
Mosallam ASStrength and ductility of reinforced concrete moment frame connections strengthened with quasi-isotropic laminates. J Compos Part B-Eng2000; 31(6-7): 481-497.
23.
ABA.Iranian concrete design code, first revision. Tehran, Iran: ABA.
24.
American Concrete Institute (ACI).Building code requirement for structural concrete. ACI Committee318, ACI318, Michigan, USA: ACI, 1995.
25.
International Conference of Building Officials (ICBO).Uniform building code. Whittier, CA: ICBO, 1994.
26.
American Concrete Institute (ACI).Recommendations for design of beam-column joints in monolithic reinforce concrete structures. ACI Committee352, ACI352, Michigan, USA: ACI, 2002.
27.
Hakuto S., Park R. and Tanaka H.Seismic load test on interior and exterior beam-column joints with substandard reinforcing details. ACI Struct J2000; 97(1): 11-25.
28.
NZS.Design of concrete structures, NZS3101: 1995, Standards Association of New Zealand. Wellington, New Zealand: NZS, 1995 .
29.
Fema 356.Prestandard and commentary for the seismic rehabilitation of buildings. USA: Federal Emergency Management Agency, 2000.
