Advanced Steel Construction

Vol. 12, No. 3, pp. 227-244 (2016)


ECCENTRIC LOADING BEHAVIOR OF L-SHAPED COLUMNS COMPOSED

OF CONCRETE-FILLED STEEL TUBES

 

T. Zhou1, M.Y. Xu2, Z.H. Chen3, X.D. Wang4,* and Y.W. Wang5

1 Lecturer, School of Architecture, Tianjin University, China

2 Master Candidate, School of Civil Engineering, Tianjin University, China

3 Professor, School of Civil Engineering, Tianjin University, China

4 Associate Professor, School of Civil Engineering, Tianjin University, China

5 Structural Designer, Tianjin University Research Institute of Architectural Design and Urban Planning, China

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

Received: 24 November 2014; Revised: 12 June 2015; Accepted: 9 November 2015

 

DOI:10.18057/IJASC.2016.12.3.2

 

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ABSTRACT

Concrete special-shaped columns have been studied and used in China for twentyyears, and can be incorporated into walls to widen indoor areas. However, concretespecial-shaped columns do not perform well under seismic action. In addition, special-shapedconcrete-filled steel tubular columns were put forward and researched as well because of theirhigh strength and ductility, but theinteraction between steel and inner concrete is small. Tie rodsare often set to solve the problem, which in turn affect the architectural appearance. To solve theabove problems, a special-shaped column composed of concrete-filled steel tubes (SCFT) wasproposed and studied. Axial loading behavior, seismic behavior, and whole structure behaviorwere studied. This type of special-shaped column has been used in residential buildings, and thestructural behavior performed well. This paper experimentally investigated the biaxial loadingbehavior of L-shaped SCFT columns. Failure modes, cooperation of mono-columns, and theeffects of eccentric angle and distance on column behavior were studied. Test results werecompared with those of finite element analysis. A reasonable simplified calculating formula wasproposed based on the study and was proved effectively through the comparison with test results.Mono-columns of SCFT columns proved to work well together. This kind of special-shapedcolumn proved to be a good structure type.

 

KEYWORDS

L-shaped column, concrete-filled steel tube, composite columns, biaxial loading test,finite element analysis, calculating formula


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