THEORETICAL INVESTIGATION OF CONCRETE FILLED STEEL HOLLOW SECTION COLUMNS

Authors

1 Ass. Lecture of civil engineering department, the Higher Institute for Engineering and Technology- El-Mina

2 Prof. and Head of civil Engineering Department, Faculty of Engineering, Nahda University,

3 Associate prof. of civil engineering department, Faculty of Engineering, Minia University

4 Lecture of civil engineering department, Faculty of Engineering, Minia University,

Abstract

           Steel concrete composite columns are widely used in high rise buildings and bridges. Composite columns provide not only great reduction for the column size and weight, but also high columns efficiency and ductility. In Concrete Filled Steel Tube (CFST) columns, the steel tube provides formwork for the concrete; the concrete prevents local buckling of the steel tube. This paper illustrates a theoretical study of the behavior of CFST columns subjected to centric load by using ANSYS (18.1). The study divided into two parts. In the first part, the verification of the program was done using an experimental work of previous research, this verification showed that the capability of ANSYS program for analysis of the CFST columns with very good accuracy.  In the second part:  a parametric study was carried out to study the behavior of CFST braced, constant cross section area, centric loaded columns. The main variables were the shape of cross section (three shapes: square, rectangular and circular) and slenderness ratio (λ). The analysis shows that the increase of the slenderness ratio led to decrease the ultimate load capacity, stiffness and ductility of the CFST columns. The current ECP of concrete code underestimates the values of ultimate load capacity while, ECP of steel predicts the reasonable values for an ultimate load capacity of CFST columns.

Keywords

Main Subjects

References

  1. Chen, W.F. "Plasticity in Reinforced Concrete", Mc Graw – Hill Book Company, 1982.  
  2. Egyptian code of practice for design of concrete construction, code number (203) 2007.
  3. Egyptian code of practice for steel construction (load and resistance factor design), code number (205) ministerial decree No 359-2007.
  4. Han H.L., Tao Z., Huang H. and Zhao X.L. (2004) "Concrete-filled double skin (SHS outer and CHS inner) steel tubular beam-column", Thin walled Structure, Vol.42, No.9, 1329-1355.
  5. Han L.H., Li Y.J and Tao Z. (2009) "Influence of Long-Term Loading on the performance of Concrete-Filled Double Skin Steel Tubular column: Experimental", proceeding of the 6th International Conference on Advances in Steel Structures (ICASS'09), Hong Kong.
  6. Hasan A. Ajel, Abdulnasser M. Abbas (2015) "Experimental and Analytical Investigations of Composite Stub Columns", International Journal of Innovative Research in Science, Engineering and Technology, Vol. 4, Issue 2.
  7. Jingfeng Wang, Beibei Li, Jinchao Li (2017) "Experimental and analytical investigation of semi-rigid CFST frames with external SCWPs" Journal of Constructional Steel Research (128), 289–304
  8. Kamal. G. METWALLY, " Shear Transfer of Concrete - Concrete Composite Slabs with Different Shear Span-to-Effective Depth Ratio", Journal of Engineering Science, Cairo university, Vol.  61, No. 5, February 2014.
  9. Oliveira, WLA. et al. (2009). "Influence of concrete strength and length/diameter on the axial capacity of CFT columns". Journal of Constructional Steel Research 65(12): 2103-2121.
  10. Sasani, M. and Kropelnicki, J. (2008), "Progressive Collapse Analysis of an RC Structure", the Structural Design of Tall and Special Buildings, Vol. 17, pp. 757-771.
  11. Tao Z. and Han L.H (2006)" Behavior of concrete filled double skin rectangular steel tubular beam-columns", Journal of constructional Steel Research, Vol. 62, No. 7, 631-646.
  12. Tao Z. and Yu Q. (2006) "New types of composite columns experiments, theory and methodology" Beijing: Science press, Chinese.   
Journal of Advanced Engineering Trends
Volume 39, Issue 1
January 2020
Pages 63-76

Files

Share

How to cite

Statistics