Experimental Study on the Axial Compression Behaviors of Short Rectangular Concrete Columns Encased in CFRP Tube

Abstract:

In this study, 9 short rectangular concrete columns with cross-section 150mm×300mm and height 600mm are prepared, they are 6 confined concrete columns encased in CFRP tubes and three concrete columns as control specimens. The tubes with fibers oriented at hoop direction are manufactured to have 3 or 5 plies of CFRP sheet with 10mm, 20mm, or 40mm rounding corner radius. To ensure proper bond, a 100mm overlap is provided in the direction of fibers. Axial compression tests are conducted to investigate the axial strengths, compression behaviors, stress-strain relationships, and ductility until the CFRP tubes rupture. It is evident that the CFRP tube confinement can improve the behaviors of concrete core, in terms of axial compressive strength or axial deformability. Experimental results also show that the stress-strain behaviors of confined specimens vary with different the layers of CFRP sheets and corner radius at vertical edges.

• Periodical: Advanced Materials Research (Volumes 250-253)
• Pages: 370-373
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.250-253.370
• Online since: May 2011
• Authors: Wen Bin Sun
• Keywords: Axial Compression Test, CFRP Tube, Confinement, Failure Mode, Rounding Corner Radius, Short Rectangular Concrete Column, Stress-Strain Response

References

[1] Fardis MN, and Khalili H. Mag. of Concrete Res. Vol. 34(1982), pp.191-202

[2] Mander JB, Priestley MN, and Park R. J. Struct. Eng. Vol. 114(1988), p.1804–1826

[3] Saadatmanesh H, Ehsani MR, and Li MW. ACI Struct. J. Vol. 91(1994), pp.434-447

[4] Seible F, Preistley N, Hegemier GA and Innamorato D. J. Compos. Constr., Vol. 1(1997), pp.52-62

[5] Samaan, M., Mirmiran, A., and Sahawy. M. J Struct Eng. Vol. 124(1998), pp.1025-1031

[6] Toutanji H, and Houssam A. ACI Mater. J. Vol. 96(1999) pp.397-404

[7] Information on http://www.basf-cc.com.au