Advanced Steel Construction

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




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




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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.



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


[1] Ramamurthy, L.N. and Hafeez, K.T.A., “L-shaped Column Design for Biaxial Eccentricity”, Journal of Structural Engineering, 1983, Vol. 109, No. 8, pp. 1903-1917.

[2] Xue, J.Y., Chen, Z.P., Zhao, H.T., Gao, L. and Liu, Z.Q., “Shear Mechanism and Bearing Capacity Calculation on Steel Reinforced Concrete Special-shaped Columns”, Steel and Composite Structures, 2012, Vol. 13, No. 5, pp. 473-487.

[3] Tokgoz, S. and Dundar, C., “Tests of Eccentrically Loaded L-shaped Section Steel Fibre High strength Reinforced Concrete and Composite Columns”, Engineering Structures, 2012, Vol. 38, pp. 134-141.

[4] Shen, Z.Y., Lei, M., Li, Y.Q., Lin, Z.Y. and Luo, J.H.,” Experimental Study on Seismic Behavior of Concrete-Filled L-Shaped Steel Tube Columns”, Advances in Structural Engineering, 2013, Vol. 16, No. 7, pp. 1235-1247.

[5] Zhou, T., Chen, Z.H. and Liu, H.B., “Seismic Behavior of Special Shaped Column Composed of Concrete-filled Steel Tubes”, Journal of Constructional Steel Research, 2012, Vol. 75, pp.131-141.

[6] Chen, Z.H., Rong, B. and Apostolos, F., “Axial Compression Stability of a Crisscross Section Column Composed of Concrete-filled Square Steel Tubes”, Journal of Mechanic of Materials and Structures, 2009, Vol. 4, No. 10, pp. 1787-1799.

[7] Chen, Z.H., Zhou, T. and Wang, X.D., “Application of Special Shaped Column Composed of Concrete-filled Steel Tubes”Advanced Materials Research, 2011, pp.196-199.

[8] Zhou, T., Li, X.F. and Xu, M.Y., “Heat Transfer Property of Special-shaped Column Composed of Concrete-filled Steel Tubes”, Journal of Tianjin University, 2015, supplement, pp.74-80.

[9] Kim, C.S., Park, H.G., Chung, K.S. and Choi, I.R., “Eccentric Axial Load Capacity of High-strength Steel-concrete Composite Columns of Various Sectional Shapes”, Journal of Structural Engineering, 2014, Vol. 140, No. 4.

[10] Halabi, Z., Ghrib, F., El-Ragaby, A. and Sennah, K., “Behavior of RC Slab-column Connections Strengthened with External CFRP Sheets and Subjected to Eccentric Loading”, Journal of Composites for Construction, 2013, Vol. 17, No. 4, pp.488-496.

[11] Ernest, B., Lluis, G., Pere, R. and Christian, E., “Experimental and Analytical Study of TRM Strengthened Brickwork Walls under Eccentric Compressive Loading”, Construction and Building Materials, 2013, Vol. 44, pp. 35-47.

[12] Song, X.B., Gu, X.L., Li, Y.P., Chen, T., and Zhang, W.P.,” Mechanical Behavior of FRP-strengthened Concrete Columns Subjected to Concentric and Eccentric Compression Loading”, Journal of Composites for Construction, 2013, Vol. 17, No. 3, pp. 336-346.

[13] Liu, H.B., Chen, Z.H., Wang, X.D. and Zhou, T., “Theoretical Analysis and Experimental Research on Stability Behavior of Structural Steel Tube and Coupler Falsework with X-bracing”, Advanced Steel Construction, 2010, Vol. 6, No. 4, pp. 946-962.

[14] Rong, B., “Theoretical Analysis and Experimental Study on Special-shaped Column Composed of Concrete-filled Square Steel Tubes”, Doctoral Dissertation, 2008, Tianjin University. (In Chinese)