Behaviour and Strength of Innovative Steel Concrete Columns with SCC

Abstract:

In this paper, totally 7 innovative steel concrete composite columns were investigated for axial load and reported. 6 of them were modified DSHCFT columns consisting only outer skin tube and butting concrete and the remaining one was Double Skinned Hollow Concrete Filled steel Tubular columns having outer and inner steel tube (DSHCFT), which was annularly in-filled with Self-Compacting Concrete (SCC). The concrete grade and yield strength of steel tubes used were respectively M35 and 250MPa. The ratios of outer tube diameter to its thickness were 34 to 36. The length to outer diameter (aspect ratio) and the hollowness ratio were from 2.4 to 4.5 and from 0.35 to 0.5 respectively. Mechanical behaviour in term of stiffness, confinement, ultimate strength and ductility were discussed. Load Vs mid-span deflection diagrams, failure patterns of the specimens are presented. The existence of composite action between steel and concrete and confinement of concrete were experimentally evidenced. Suitability of two existing design codes is verified. For the design of the modified DSHCFT Stub columns with SCC and DSHCFTs, a possible simplified formula is suggested.Keywords: Failure mode, Stiffness, ductility, confinement, Ultimate load, Simplified formula.

• Periodical: Advanced Materials Research (Volumes 984-985)
• Pages: 684-692
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.984-985.684
• Online since: July 2014
• Authors: Natesan Balasubramani*, R. Thenmozhi
• Keywords: Confinement, Ductility, Failure Mode, Simplified Formula, Stiffness, Ultimate Load

References

[1] Xiao-Ling Zhao, Raphael Grzebieta, Strength and ductility of concrete filled double skin (SHS inner and SHS outer) tubes, Thin-Walled Structures 40 (2002) 199–213.

DOI: 10.1016/s0263-8231(01)00060-x

[2] Xiao-Ling Zhao, Byoungkee Han, Raphael H. Grzebieta, Plastic Mechanism Analysis Of Concrete-Filled Double - Skin (SHS Inner and SHS Outer) Stub Columns, Thin-Walled Structures 40 (2002) 815–833.

DOI: 10.1016/s0263-8231(02)00030-7

[3] Lin-Hai Han, Zhong Tao, Hong Huang, Xiao-Ling Zhao, Concrete-filled double skin (SHS outer and CHS inner) steel tubular beam-columns, Thin-Walled Structures 42 (2004) 1329–1355.

DOI: 10.1016/j.tws.2004.03.017

[4] Lin-Hai Han, Guo-Huang Yao, Experimental behaviour of thin-walled hollow structural steel (HSS) columns filled with self-consolidating concrete (SCC), Thin- Walled Structures 42 (2004) 1357–1377.

DOI: 10.1016/j.tws.2004.03.016

[5] Zhong Tao, Lin-Hai Han, Xiao-Ling Zhao, Behaviour of concrete-filled double skin (CHS inner and CHS outer) steel tubular stub columns and beam-columns, Journal of Constructional Steel Research 60 2004) 1129–1158.

DOI: 10.1016/j.jcsr.2003.11.008

[6] Dalin Liua, Wie-Min Ghob, Axial load behaviour of high-strength rectangular concrete-filled steel tubular stub columns, Thin-Walled Structures 43 (2005) 1131– 1142.

DOI: 10.1016/j.tws.2005.03.007

[7] Lin-Hai Han, Guo-Huang Yao, Xiao-Ling Zhao, Tests and calculations for hollow structural steel (HSS) stub columns filled with self-consolidating concrete (SCC),., Journal of Constructional Steel Research 61 (2005) 1241–1269.

DOI: 10.1016/j.jcsr.2005.01.004

[8] Zhong Tao, Lin-Hai Han, Behaviour of concrete-filled double skin rectangular steel tubular beam–columns, Journal of Constructional Steel Research 62 (2006) 631–646.

DOI: 10.1016/j.jcsr.2005.11.008

[9] Zhi-wu Yu, Fa-xing Ding, C.S. Cai, Experimental behavior of circular concrete-filled steel tube stub columns, Journal of Constructional Steel Research 63 (2007) 165–174.

DOI: 10.1016/j.jcsr.2006.03.009

[10] Artiomas kuranovas, Audronis Kazimieras Kvedaras, Behaviour of Hollow Concrete–filled Steel Tubular Composite Elements, Journal of Civil Engineering and Management 2007, Vol XIII, No. 2, 131-141.

DOI: 10.3846/13923730.2007.9636429

[11] E.K. Mohanraj Dr. S. Kandasamy Experimental Behaviour of Axially Loaded Hollow Steel Columns In- filled with Concrete, IE (I) Journal-CV-Vol 88, February (2008).

[12] ACI Committee 318. Building Code Requirements for structural Concrete,. ACI 318-95, American Concrete Institute, Detroit, (1995).

DOI: 10.1061/(asce)1076-0431(1996)2:3(120.3)

[13] Australian Standards1 AS3600 and AS4100. Reinforced Concrete Structures and Steel Structures,. Standards Australia, Sydney, (1994).

[14] Prof. Okamura, , 2003, Self Compacting Concrete, Journal Of advanced concrete Technology Vol 1, No1, Pg. 5-15.

[15] The European Guidelines for Self-Compacting Concrete Specification, Production and Use, May 2005, www. efca. info or www. efnarc. org.

[16] G Giakoumelis and D Lam, Axial capacity of circular concrete filled tube columns, (2004) Journal of constructional steel Research vol. 60 (2004), pp.1049-1068.

DOI: 10.1016/j.jcsr.2003.10.001