Advanced Steel Construction

Vol. 9, No. 3, pp. 231-246 (2013)


BEHAVIOR OF HIGH STRENGTH CONCRETE FILLED SQUARE STEEL TUBULAR COLUMNS WITH INNER CFRP CIRCULAR TUBE UNDER BI-AXIAL ECCENTRIC LOADING

 

G.C. Li 1,*, Z.J. Yang 2, Y. Lang 3 and C. Fang 1

1 School of Civil Engineering, Shenyang Jianzhu University, Shenyang, 110168, China

2 School of civil Engineering, Tianjin University, Tianjin, 300072, China

3 Department of building Engineering, Suqian College, Jiangsu Province, 223800, China

*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)

 

Received: 16 January 2012; Revised: 18 May 2012; Accepted: 22 May 2012

DOI:10.18057/IJASC.2013.9.3.5

 

ABSTRACT:

This paper presents a theoretical study of high strength concrete filled square steel tubular columns with inner CFRP (carbon fiber-reinforced polymer) circular tube subjected to bi-axial eccentric loading. The new type of composite member is composed of a CFRP inner tube and a outer steel tube with concrete filled in the two tubes. The finite element analysis (FEA) is made by ABAQUS software on the behavior of high strength concrete filled square steel tubular columns with inner CFRP circular tube subjected to bi-axial eccentric loading. The results obtained from the finite element analysis were verified with the experimental results. An extensive parametric study was conducted to investigate the effects of steel yielding strength, concrete strength, steel ratio, slenderness ratio on the interaction curve N/Nu-M/Mu of column subjected to bi-axial eccentric loading. The parametric studies provide information for the development of formula to calculate the bearing capacity. The experimental failure load and the predicted failure load calculated by the formula showed good agreement.

 

Keywords:CFRP tube, Square steel tube, High strength concrete, Bi-axial eccentric load, Finite element analysis (FEA)

 

Download PDF: