The Experimental Study on Concrete-Filled Thin-Walled Square Steel Box Short Columns Fixed with Composite Steel Bar

Abstract:

The method of construction about the concrete-filled thin-walled square steel box short columns is studied in this paper. Composite steel is designed inside of the concrete-filled thin-walled square steel box short columns. The use of the transverse steel bars’ constraining effect on the concrete and bonding effect on the walls enhances the local stability and bearing capacity of the wall. According to the concrete strength C30/C35/C40 and the thickness of the steel 1.25mm/1.75mm/2.5mm,42 short column specimens are made and the size of all specimens is 200mm×200mm×690mm.The static bearing capacity test is done by the 500-ton electro-hydraulic serve testing machine. The whole curve is made .The composite steel and the thin-walled steel’s strain is tested. The results show that this method of construction has a certain effect on constrainting concrete and bonding effect on the walls, significantly improving their mechanical properties, increasing the carrying capacity and ductility, and it is easy to be accomplished.

• Periodical: Applied Mechanics and Materials (Volumes 94-96)
• Pages: 1590-1595
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.94-96.1590
• Online since: September 2011
• Authors: Hai Chao Wang, Xi Quan Xu, Li Jun Zhou
• Keywords: Built-in Composite Reinforced Rachel, Concrete-Filled Thin-Walled Square Steel Box Short Columns, Ductility, Failure Mode

References

[1] Guo ZH, Shi DX. Reinforced concrete theory and analysis (first edition). Beijing: Tsinghua University Press, 2003,2(In Chinese).

[2] Zhong ST. Concrete-filled steel tube structure (third edition). Beijing: Tsinghua University Press, 2003,8(In Chinese).

[3] Cai SH. The latest progress of concrete-filled steel tube structure's technology in China [J]. Civil Engineering. Vol.32, No.4, 1998.8(In Chinese).

[4] Han LH. Concrete-filled steel tube structure - theory and practice [M]. Science press. 2004.3

[5] Hu SG, Ding QJ. Concrete-filled steel tube [M]. China Communications Press .2007.1

[6] Han LH. The characteristics and development of concrete-filled steel tube structure [J]. Industrial Construction. 1998, 2 (1) (In Chinese).

[7] Cai SH. Modern concrete-filled steel tube structure. Beijing: China Communications Press. 2003.

[8] Chen Y, Zhang YC. The finite element analysis and experimental study of pulled slice quadrate thin-wall concrete-filled steel tube short columns [J]. Journal of building structures, 2006 (10): 23-29(In Chinese).

[9] Uy B.Local and post-local buckling of concrete filled steel welded box columns[J].Journal of Constructional Steel research,1998,47(1-2):47-72.

DOI: 10.1016/s0143-974x(98)80102-8

[10] Shanmugam N E,Lakshmi B,Uy B.An analytical model for thin-walled steel box columns with concrete in-fill[J].Engineering Structure,2002,24(6):825-838.

DOI: 10.1016/s0141-0296(02)00019-6

[11] Zhang YC, Chen Y. The finite element analysis and experimental study of a straight rib quadrate thin-wall concrete-filled steel tube short columns [J]. Journal of building structures, 2006 (10): 16-22(In Chinese).

[12] Desmond T P,Pekoz T,Intermediate stiffeners for thin-walled members[J].Journal of structure Engineering ASCE,1981,107(4):627-647.

DOI: 10.1061/jsdeag.0005678