Advanced Steel Construction

Vol. 7, No. 2, pp. 144-156 (2011)


BEHAVIOR OF LIGHTWEIGHT AGGREGATE CONCRETE FILLED STEEL TUBULAR SLENDER COLUMNS UNDER AXIAL COMPRESSION

 

Fu Zhong-qiu 1, Ji Bo-hai 2, *, Lv Lei 3 and Zhou Wen-jie 3

1 PhD Candidate, College of Civil and Transportation Engineering

Hohai University, Xikang Road 1#, Nanjing, Jiangsu, P.R. China 210098

2 Professor, College of Civil and Transportation Engineering

Hohai University, Xikang Road 1#, Nanjing, Jiangsu, P.R. China 210098

3 M.E., College of Civil and Transportation Engineering

Hohai University, Xikang Road 1#, Nanjing, Jiangsu, P.R. China 210098

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

Received: 11 July 2010; Revised: 28 September 2010; Accepted: 23 November 2010

 

DOI:10.18057/IJASC.2011.7.2.2

 

View Article   Export Citation: Plain Text | RIS | Endnote

ABSTRACT

Based on axially compressive tests on 6 short columns and 27 slender columns of lightweight aggregate concrete filled steel tube (LACFST)macroscopic deformation charactersaxial force-longitudinal strain curvesfailure mode and failure mechanism are studied. The results are also compared with these of the normal concrete filled steel tube. The test results demonstrated that slenderness ratio is the main influence factor to the behavior of LACFST long columns under axial load. The greater the slenderness ratio is, the lower the ultimate bearing capacity and stability coefficient of the specimen are, and the performances of core concrete affect the stability behavior of lightweight aggregate concrete and normal concrete filled steel tube long columns. The stability coefficient of specimens is determined by the peak strain of concrete and unrelated to the peak strength of concrete. The stability coefficient increases when the peak strain of concrete increasing. Comparison results show that calculation formula in Europe code EC4 (1996) can be applied to calculate the bearing capacity of LACFST columns under axially compressive load.

 

KEYWORDS

Lightweight aggregate concrete filled steel tube; axial compressed test; slenderness ratio; stability coefficient; bearing capacity


REFERENCES

[1]       Ge, H.B., Susantha, K.A.S., Satake, Y., et al., “Seismic Demand Predictions of Cconcrete-filled Steel Box Columns”, Engineering Structures, 2003, Vol. 25, No. 3, pp. 337-345.

[2]       Han, L.H., Lu, H., Yao, G.H., et al, “Further Study on the Flexural Behaviour of Concrete-filled Steel Tubes”, Journal of Constructional Steel Research, 2006, Vol. 62, No. 6, pp. 554-565.

[3]       Kuranovas, A., Goode, D., Kvedaras, A.K., et al, “Load-bearing Capacity of Concrete-filled Steel Columns”, Journal of Civil Engineering and Management, 2009, Vol. 15, No. 1, pp. 21-33.

[4]       Gao, S.B. and Ge, H.B., “Numerical Simulation of Hollow and Concrete-filled Steel Columns”, Int. J. of Advanced Steel Construction, Vol. 3, No. 3, pp. 668-678.

[5]       Goode, C.D., “Composite Columns - 1819 Tests on Concrete-filled Steel Tube Columns Compared with Euro Code 4”, Structural Engineer, 2008, Vol. 86, No. 16, pp. 33-38.

[6]       Chen, B.C. and Wang, T.L., “Overview of Concrete Filled Steel Tube Arch Bridges in China”, Practice Periodical on Structural Design and Construction, 2009, Vol. 14, No. 2, pp. 70-80.

[7]       Susantha, K.A.S., Ge, H.B. and Usami, T., “Cyclic Analysis and Capacity Prediction of Concrete-filled Steel Box Columns”, Earthquake Engineering & Structural Dynamics, 2002, Vol. 31, No. 2, pp. 195-216.

[8]       Ge, H.B. and Usami, T. “Cyclic Tests of Concrete-filled Steel Box Columns”, Journal of Structural Engineering, ASCE, 1996, Vol. 122, No. 10, pp. 1169-1177.

[9]       Liu, H.Y. and Song, Y.P., “Experimental Study of Lightweight Aggregate Concrete under Multiaxial Stresses”, Journal of Zhejiang University-Science A, 2010, Vol. 11, No. 8, pp. 545-554.

[10]     Haque, M.N., Al-Khaiat, H. and Kayali, O., “Strength and Durability of Lightweight Concrete”, Cement and Concrete Composites, 2004, Vol. 26, No. 4, pp. 307-314.

[11]     Nakamura, S., Momiyama, Y., Hosaka, T., et al., “New Technologies of Steel/Concrete Composite Bridges”, Journal of Constructional Steel Research, 2002, Vol. 58, No. 1, pp. 99-130.

[12]     Mouli, M. and Khelafi, H., “Strength of Short Composite Rectangular Hollow Section Columns Filled with Lightweight Aggregate Concrete”, Engineering Structures, 2007, Vol. 29, No. 8, pp. 1791-1797

[13]     Cai, S.H., “Modern Concrete Filled Steel Tube Structure”, China Communications Press, 2003, pp. 63 (in Chinese).

[14]     Han, L.H. and Yang, Y.F., “Modern Concrete Filled Steel Tube Structure Technology”, China Architecture & Building Press, 2004, pp. 80 (in Chinese).

[15]     Wang, Z.Y., Ding, J.T. and Guo, Y.S., “Stress-Strain Curves of Structural Lightweight Aggregate Concretes”, Concrete, 2005, No. 3, pp. 39-41 (in Chinese).

[16]     Chinese Code, “Code for Design of Concrete Structures (GB 50010-2002)”, 2002 (in Chinese).