Experimental Study on the Compressive Behavior of Concrete Encased in CFRP Tubes

Abstract:

Fiber reinforced polymer (FRP) tube-encased concrete columns represent a formwork-free, steel-free, and corrosion-resistant alternative for a construction of a new infrastructure. In this study, a total of nine square concrete columns with cross-section of 200mm×200mm and height of 600mm including six confined concrete encased in CFRP tubes and three unconfined concrete as control specimens are prepared. The tubes with fibers oriented at 90° from axial direction are manufactured to have 3 or 5 plies of CFRP with 10mm, 20mm, or 40mm rounding corner radius. To ensure proper bond, a 100mm overlap is provided in the direction of fibers. Uniaxial compressive tests are conducted to investigate the axial strength, compressive behavior, stress-strain relationship, and ductility of them throughout the loading history until the CFRP tubes rupture. It is evident that in all cases, the CFRP tube confinement can improve the behavior of unconfined concrete, in terms of axial compressive strength or axial deformability. Test results have shown that the stress-strain behavior of confined specimens vary with different confinement parameters, such as the level of confinement (3-ply and 5-ply), corner radius at vertical edges (10, 20 and 40 mm).

• Periodical: Advanced Materials Research (Volumes 168-170)
• Pages: 1335-1341
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.168-170.1335
• Online since: December 2010
• Authors: Wen Bin Sun
• Keywords: Carbon Fiber Reinforced Polymer Tubes, Compressive Test, Confinement, Corner Radius Effect, Failure Mode, Square Concrete Columns, 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] Lam L and Teng J.G. J. Struct Eng. Vol. 128(2002), pp.612-623.

[8] Teng J.G., and Lam L. J. Struc. Eng. Vol. 130(2004), pp.1713-1723.

[9] Binici B. J. Engrn. Struct., Vol. 27(2005), pp.1040-1051.

[10] Mirmiran A, Shahawy M, Samaan M. and El Echary H. J. Compos. Constr. Vol. 2(1998), pp.175-85.

[11] Nanni A. and Bradford M.N. Constr. Build. Mat. Vol. 9(1995), pp.115-124.

[12] Mirmiran A. and Shahawy. Compos. Part B Vol. 27(1996), p.263–268.

[13] Mirmiran A. and Shahawy M. Mech. of Cohesive-Frictional Mat., Int. J. Vol. 2(1997), pp.237-249.

[14] Xiao Y. and Wu H. J. Mater. Civ. Engng Vol. 12 (2000), p.139–46.

[15] Pessiki S, Harries K. A, Kestner J, Sause R. and Ricles J.M. J. Compos. Constr., Vol. 5(2001), pp.237-245.

DOI: 10.1061/(asce)1090-0268(2001)5:4(237)

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