Axial Compressive Strength of Metal Sheet Confined Concrete Cylinders Based on Various Concrete Strengths
Abstract
This paper investigated effect of concrete strength on axial strength improvement of the metal sheet confined concrete cylinders under axial compression. Totally, 27 concrete specimens were tested based on three different concrete strengths of approximately 13, 32 and 39 MPa. Epoxy was used as a bonding material along interface between concrete and metal sheet. Based on three different concrete strengths, different level of confinement was established by taking one layer and three layers of metal sheet confinement. The experimental results revealed that axial compressive strength of concrete cylinders could be improved by mean of metal sheet wrapping. It was shown that effectiveness of axial strength improvement of metal sheet confined concrete cylinders depended on original unconfined compressive strength of the core concrete. With lower concrete strength, it was found that use of metal sheet confinement could increase the original strength of the columns more effectively than the case of higher concrete strength. Based on existing results, it was observed that strength improvement prediction given by Richart et al. (1928) could be adopted conservatively with exception of very low concrete strength.
Keywords
References
Vandoros, K.G., and S.E. Dritsos. “Concrete jacket construction detail effectiveness when strengthening RC columns.” Construction and Building Materials 22 (2008): 264–276. doi:10.1016/j.conbuildmat.2006.08.019.
Ghobarah, A., A. Biddah, and M. Mahgoub. “Seismic retrofit of reinforced concrete columns using steel jackets.” European Earthquake Engineering 11(1997): 21-31.
Sakulkoo, M., and Y. Tonneu. “Shear strengthening of reinforced concrete beam using cold-form metal sheet” (2008). Undergraduate Engineering Student Project Report, Khon Kaen University, Thailand. (In Thai)
Horsilachai, K., K. Chanbang, and N. Saisri. “Strengthening of RC slab using metal sheet” (2009). Undergraduate Engineering Student Project Report, Khon Kaen University, Thailand. (In Thai)
Somnamee, K., T. Kruakam, and S. Kaewsuwan. “Flexural resistance of RC Member strengthened by metal sheet” (2009). Undergraduate Engineering Student Project Report, Khon Kaen University, Thailand. (In Thai)
Saisaen, W., H. Damnernpol, and A. Ruangsak. “Compression Strengthening of RC column by metal sheet” (2010). Undergraduate Engineering Student Project Report, Khon Kaen University, Thailand. (In Thai)
Wangsa, K., T. Inla, and P. Charoensri. “Study on Increasing Efficiency of Metal-Sheet Bonded Square Concrete Columns under Uniaxial Compression” (2011). Undergraduate Engineering Student Project Report, Khon Kaen University, Thailand. (In Thai)
Hongsinlark, N., M. Boonpichetvong, and T. Pannachet. “Finite element modeling of axially loaded concrete columns with metal sheet confinement.” KKU Engineering Journal 41(4) (2014): 517-525. (In Thai)
Boonpichetvong, M., T. Pannachet, and S. Pinitkarnwatkul. “Finite element modeling of concrete specimens confined with metal sheet strips.” International Journal of Technology 7(2016): 1132-1140. doi:10.14716/ijtech.v7i7.4875.
Boonpichetvong, M., T. Pannachet, S. Pinitkarnwatkul, and H. Askes. “Concrete columns with discrete confinement by metal sheets subjected to uniaxial compression: derivation toward design rule.” Engineering and Applied Science Research 45(1) (2018): 56-64. doi:10.14456/easr.2018.2.
Mirmiran, A., and M. Shahawy. “Effect of column parameters on FRP-confined concrete.” Journal of Composites for Construction 2(4)(1998): 175-185. doi:10.1061/(asce)1090-0268(1998)2:4(175).
Shehata, L.A.E.M., L.A.V. Carneiro, and L.C.D. Shehata. “Strength of short concrete columns confined with CFRP sheets.” Materials and Structures 35 (2002): 50-58. doi:10.1007/bf02482090.
Wang, L-M., and Y-F. Wu. “Effect of corner radius on the performance of CFRP-confined square concrete columns: Test.” Engineering Structures 30(2) (2007): 493–505. doi:10.1016/j.engstruct.2007.04.016.
Wu, Y-F., and Y-Y. Wei. “Effect of cross-sectional aspect ratio on the strength of CFRP-confined rectangular concrete columns.” Engineering Structures 32(1) (2010): 32-45. doi:10.1016/j.engstruct.2009.08.012.
Hongsinlark, N. “Computational modeling of axially loaded concrete columns with metal sheet confinement” (2013). Master of Engineering Thesis, Khon Kaen University, Thailand. (In Thai)
Almusallam, T.H. “Behavior of normal and high-strength concrete cylinders confined with E-glass/epoxy composite laminates.” Composites Part B: Engineering 38(2007): 629-639. doi:10.1016/j.compositesb.2006.06.021.
Vincent, Th., and T. Ozbakkaloglu. “Influence of concrete strength and confinement method on axial compressive behavior of FRP confined high- and ultra high-strength concrete.” Composites Part B: Engineering 50(2013): 413-428. doi:10.1016/j.compositesb.2013.02.017.
Pour,A.F., T. Ozbakkaloglu, and T. Vincent. “Simplified design-oriented axial stress-strain model for FRP-confined normal- and high-strength concrete.” Engineering Structures 175(2018):501-516. doi:10.1016/j.engstruct.2018.07.099.
Lim, J.C., and T. Ozbakkaloglu. “Confinement model for FRP-confined high-strength concrete.” Journal of Composites for Construction 18(4)(2014), Article number 04013058. doi:10.1061/(asce)cc.1943-5614.0000376.
Richart, F.E., A. Brandtzaeg, and B.L. Brown. “A study of the failure of concrete under combined compressive stresses” (1928). Engineering Experimental Station Bulletin No.185, University of Illinois, Illinois, Urbana.
ACI Committee 211. “ACI 211.1 – Reapproved 2009, Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete” (2009). American concrete institute, ACI International, Farmington Hills, MI, 38pp.
ASTM International. “ASTM C39 / C39M-12 Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens” (2012). West Conshohocken, PA, www.astm.org.
ASTM International. “ASTM E8 / E8M-11 Standard Test Methods for Tension Testing of Metallic Materials” (2011). West Conshohocken, PA, www.astm.org.
Cui, C. “Behaviour of normal and high strength concrete confined with fibre reinforced polymers (FRP)” (2009). PhD Thesis, University of Toronto.
Razvi, S., and M. Saatcioglu. “Confinement model for high-strength concrete.” Journal of Structural Engineering (ASCE) 125(3) (1999): 281-289. doi:10.1061/(asce)0733-9445(1999)125:3(281).
DOI: 10.28991/cej-03091178
Refbacks
- There are currently no refbacks.
Copyright (c) 2018 Tanyada Pannachet, Maetee Boonpichetvong
This work is licensed under a Creative Commons Attribution 4.0 International License.
