Sage Journals: Discover world-class research

Abstract

In this article, a new model for eccentrically loaded FRP-confined circular concrete columns is presented. The cross-section is built up by 2D finite elements (where the variation of the stresses and strains is 3D), and the concrete modeled by a confinement-sensitive (non-associated) material law. The numerical solution of this model showed agreement with the experimental results available in the literature. It is shown that the maximum axial stresses in the cross-section – despite of the big differences in the radial- and hoop confinement stresses – are about the same for concentric and eccentric loadings. It is also shown that the recommended stress–strain curves available in the literature may lead to non-conservative results for eccentric loading, and – based on our numerical calculations – new stress–strain curves are recommended.

Keywords

FRP-confined circular concrete column eccentric

Get full access to this article

View all access options for this article.

References

Csuka

Kollár

. FRP confined circular concrete columns subjected to concentric loading. J Reinf Plast Compos 2010; 29(23): 3504–3520.

Hadi

MNS

. Comparative study of eccentrically loaded FRP wrapped columns. Compos Struct 2006; 74: 127–135.

Hadi

MNS

. The behaviour of FRP wrapped HSC columns under different eccentric loads. Compos Struct 2007; 78: 560–566.

Hadi

MNS

. Behaviour of eccentric loading of FRP confined fibre steel reinforced columns. Constr Build Mater 2009; 23: 1102–1108.

Fam

Rizkalla

. Large scale testing and analysis of hybrid concrete/composite tubes for circular beam-column applications. Constr Build Mater 2003; 17: 507–516.

Elnabelsy

Saatcioglu

. Seismic retrofit of circular and square bridge columns with CFRP jackets. Advanced Composite Materials in Bridges and Structures, 2004, Calgary, Alberta, Canada, 8.

Saadatmanesh

Ehsani

. Strength and ductility of concrete columns externally reinforced with fiber composite straps. ACI Struct J 1994; 91(4): 434–447.

Sheikh

Yau

. Seismic behavior of concrete columns confined with steel and fiber-reinforced polymers. ACI Struct J 2002; 99(1): 72–80.

Bisby

Ranger

. Axial-flexural interaction in circular FRP-confined reinforced concrete columns. Constr Build Mater 2010; 24: 1672–1681.

10.

Lam

Teng

. Design-oriented stress-strain model for FRP-confined concrete. Constr Build Mater 2003; 17: 471–489.

11.

Eurocode 2: Design of concrete structures – Part 1-1: General rules and rules for buildings. ENV 1992-1-1. London, UK: British Standard Institution.

12.

Rocca

Galati

Nanni

. Interaction diagram methodology for design of FRP-confined reinforced concrete columns. Constr Build Mater 2009; 23: 1508–1520.

13.

Parvin

Wang

. Concrete columns confined by fiber composite wraps under combined axial and cyclic lateral loads. Compos Struct 2002; 58: 539–549.

14.

Papanikolaou

Kappos

. Confinement-sensitive plasticity constitutive model for concrete in triaxial compression. Int J Solids Struct 2007; 44: 7021–7048.

15.

Ghali KN, Rizkalla SH, Kassem MA, Fawzy TM and Mahmoud MH. FRP-confined circular columns under small eccentric loading. In: 5th Alexandria International Conference on Structural and Geotechnical Engineering, 20–22 December 2003, Alexandria, Egypt CD-ROM.

FRP-confined circular columns subjected to eccentric loading

Abstract

Keywords

Get full access to this article

References