Fibre-reinforced polymer (FRP) composites were widely utilized in civil engineering structures as the retrofit of reinforced concrete (RC) columns. To design FRP jackets safely and economically, the behaviour of such ...Fibre-reinforced polymer (FRP) composites were widely utilized in civil engineering structures as the retrofit of reinforced concrete (RC) columns. To design FRP jackets safely and economically, the behaviour of such columns should be predicted first. This paper is concerned with the analysis and behaviour of FRP-confined RC circular and rectangular short col- umns subjected to eccentric loading. A simple design-oriented stress-strain model for FRP-confined concrete in a section analysis was first proposed. The accuracy was then proved by two test data. Following that, a parametric study including amount of FRP confinement, FRP strain capacity, unconfined concrete strength and shape of column section is provided. Some conclusions were obtained at the end of the paper. The work here will provide a comprehensive understanding of the behaviour of FRP-confined concrete columns. The simplicity of the model also enables a simple equivalent stress block to be developed for direct use in practical design.展开更多
［1］Arduini, M., Nanni, A. and Romagnolo, M. (2004) "Performance of one-way reinforced concrete slabs with externally bonded fiber-reinforced polymer strengthening", ACI Structural Journal, Vol.101, No. 2, ...［1］Arduini, M., Nanni, A. and Romagnolo, M. (2004) "Performance of one-way reinforced concrete slabs with externally bonded fiber-reinforced polymer strengthening", ACI Structural Journal, Vol.101, No. 2, pp. 193-201.［2］AS 1012 Methods of Testing Concrete, Standards Australia, Sydney, Australia.［3］AS1391 (1991)Methods for Tensile Testing of Metals, Standards Australia, Sydney, Australia.［4］AS3600 (2001) Concrete Structures, Standards Australia, Sydney, Australia.［5］AS/NZS4671 (2001) Steel Reinforcing Materials, Standards Australia, Sydney, Australia.［6］Lam, L. and Teng, J.G. (2001) “Strength of RC cantilever slabs bonded with GFRP strips”,Journal of Composites for Construction, ASCE, Vol. 5, No. 4, pp. 221-227.［7］Seim, W., Horman, M. Karbhari, V. and Seible, F. (2001) “External FRP poststrengthening of scaled concrete slabs”, Journal of Composites for Construction, ASCE, Vol. 5, No. 2, pp. 67-75.［8］Smith, S.T. and Gilbert, R.I. (2003) “Tests on RC slabs reinforced with 500 MPa welded wire fabric”, Proceedings (CD-ROM), Concrete in the 3rd Millennium, CIA 2003, 21st Biennial Conference, Concrete Institute of Australia (CIA), Brisbane, Australia, 17-19 July.［9］Teng, J.G., Lam, L, Chan, W. and Wang, J. (2000) “Retrofitting of deficient RC cantilever slabs using GFRP strips”, Journal of Composites for Construction, ASCE, Vol. 4, No. 2, pp. 75-84.［10］Teng, J.G., Chen, J.F., Smith, S.T. and Lam, L. (2002) FRP-Strengthened RC Structures, John Wiley & Sons, Chichester, West Sussex, U.K., 245 pp.［11］Teng, J.G., Smith, S.T., Yao, J. and Chen, J.F. (2003) “Intermediate crack induced debonding in RC beams and slabs”, Construction and Building Materials, Vol. 17, No. 6-7, pp.展开更多
文摘Fibre-reinforced polymer (FRP) composites were widely utilized in civil engineering structures as the retrofit of reinforced concrete (RC) columns. To design FRP jackets safely and economically, the behaviour of such columns should be predicted first. This paper is concerned with the analysis and behaviour of FRP-confined RC circular and rectangular short col- umns subjected to eccentric loading. A simple design-oriented stress-strain model for FRP-confined concrete in a section analysis was first proposed. The accuracy was then proved by two test data. Following that, a parametric study including amount of FRP confinement, FRP strain capacity, unconfined concrete strength and shape of column section is provided. Some conclusions were obtained at the end of the paper. The work here will provide a comprehensive understanding of the behaviour of FRP-confined concrete columns. The simplicity of the model also enables a simple equivalent stress block to be developed for direct use in practical design.
文摘［1］Arduini, M., Nanni, A. and Romagnolo, M. (2004) "Performance of one-way reinforced concrete slabs with externally bonded fiber-reinforced polymer strengthening", ACI Structural Journal, Vol.101, No. 2, pp. 193-201.［2］AS 1012 Methods of Testing Concrete, Standards Australia, Sydney, Australia.［3］AS1391 (1991)Methods for Tensile Testing of Metals, Standards Australia, Sydney, Australia.［4］AS3600 (2001) Concrete Structures, Standards Australia, Sydney, Australia.［5］AS/NZS4671 (2001) Steel Reinforcing Materials, Standards Australia, Sydney, Australia.［6］Lam, L. and Teng, J.G. (2001) “Strength of RC cantilever slabs bonded with GFRP strips”,Journal of Composites for Construction, ASCE, Vol. 5, No. 4, pp. 221-227.［7］Seim, W., Horman, M. Karbhari, V. and Seible, F. (2001) “External FRP poststrengthening of scaled concrete slabs”, Journal of Composites for Construction, ASCE, Vol. 5, No. 2, pp. 67-75.［8］Smith, S.T. and Gilbert, R.I. (2003) “Tests on RC slabs reinforced with 500 MPa welded wire fabric”, Proceedings (CD-ROM), Concrete in the 3rd Millennium, CIA 2003, 21st Biennial Conference, Concrete Institute of Australia (CIA), Brisbane, Australia, 17-19 July.［9］Teng, J.G., Lam, L, Chan, W. and Wang, J. (2000) “Retrofitting of deficient RC cantilever slabs using GFRP strips”, Journal of Composites for Construction, ASCE, Vol. 4, No. 2, pp. 75-84.［10］Teng, J.G., Chen, J.F., Smith, S.T. and Lam, L. (2002) FRP-Strengthened RC Structures, John Wiley & Sons, Chichester, West Sussex, U.K., 245 pp.［11］Teng, J.G., Smith, S.T., Yao, J. and Chen, J.F. (2003) “Intermediate crack induced debonding in RC beams and slabs”, Construction and Building Materials, Vol. 17, No. 6-7, pp.
