Creep Modeling for Concrete Filled Steel Tubular Members Compressed with a Large Eccentricity

Abstract:

Based on concrete creep calculation model B3 and mechanical characteristics of concrete-filled steel tube (CFT) beam-column members of large eccentricity, a creep calculation model of CFT beam-column members of large eccentricity is constructed, which accords with mechanisms of concrete creep, and creep characteristics of concrete core of CFT beam-column members of large eccentricity have been taken into account. The model is verified against previous creep experiments for CFT beam-column specimens, by changing model B3 for ACI209, CEB90, GL2000 model, elastic continuation and plastic flow theory. The results show that introduction of model B3 to predicting creep of CFT beam-column members with a large eccentricity is necessary. Using the model, a study is then carried out on the effects of practical design parameters, such as concrete mix (e.g. water to cement ratio ( ), aggregate to cement ratio ( )), steel ratio and eccentricity ratio, on creep of CFT beam-column members with a large eccentricity.

• Periodical: Advanced Materials Research (Volumes 150-151)
• Pages: 1343-1351
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.150-151.1343
• Online since: October 2010
• Authors: Bing Han, Qian Wang, Yuan Feng Wang
• Keywords: Concrete-Filled Steel Tube (CFST), Creep, Large Eccentricity, Model B3

References

[1] Wassim N., Amir M. 2003. Creep modeling for concrete-filled steel tubes, Journal of constructional steel research, 59: 1327-1344.

DOI: 10.1016/s0143-974x(03)00085-3

[2] Nakai H., Kurita A., Ichinose L.H. 1991. An experimental study on creep of concrete filled steel pipes, Proceedings of the 3rd international conference on steel-concrete composite structures Fukuoka, Japan, September: 55-60.

DOI: 10.1016/s0143-974x(00)00021-3

[3] Ichinose L.H., Watanabe E., Nakai H. 2001. An experimental study on creep of concrete filled steel pipes, Journal of constructional steel research, 57: 453-466.

DOI: 10.1016/s0143-974x(00)00021-3

[4] Terrey P.J., Bradford M.A., Gilbert R.I. 1994. Creep and shrinkage of concrete in concrete-filled circular steel tubes, Proc. of 6th inter. symposium on tubular structure, Melbourne, Australia: 293-298.

DOI: 10.1201/9780203735015-43

[5] Han, L.H., Tao, Z., Liu, W., Chen, B.C., 2001. Effects of long-term Loads on the strength of concrete-filled steel box columns, China Journal of Highway and Transport, 14(3): 57-60.

[6] Han L. H., Yang Y. F., Liu, W., 2004. The behavior of concrete-filled steel tubular columns with rectangular section under of long-term loading, Journal of Chinese Civil Engineering Society, 37(3): 12-18.

[7] Tan S.J., Qi J.L., 1987. Experimental investigation of the effects on the strength of concrete filled tubular compression members load. Journal of Harbin Architectural and Civil Engineering Institute, (2): 10-24.

[8] Morino S., Kswanguchi J., Cao Z.S., 1996. Creep behavior of concrete filled steel tubular members, Proc. of an engineering foundation confer. on steel-concrete composite structures. ASCE, Irsee: 514-525.

[9] Han, L. H., Liu, W., 2002. The effects of long-time loading on the behavior of concrete-filled steel tubular member, Journal of Chinese Civil Engineering Society, 35(2): 43-48.

[10] Han B., Wang Y. F., 1999. Creep Analysis of Concrete Filled Steel Tubular Beams. Railway Standard Design, 5: 19-20.

[11] Wang Y.F., Han B., 2000. Creep Analysis of Axially Compressed Concrete Filled Steel Tubular Members, China Journal of Highway and Transport, 13(2): 57-60.

[12] Bazant Z.P., Baweja S., 1994, Creep and shrinkage prediction model for analysis and design of concrete structures-model B3, Structural Engineering, Rep. 94-10/603c, Northwestern Univ.; also Material and Structure., Paris, France, 281995, 357-365, 425-4430, 488-495.

DOI: 10.1007/bf02473171

[13] Ahamd S.H., Shah S.P. 1982. Complete tri-axial stress-strain curves for concrete, Journal of Structural Engineering, 108(4): 728-742.

[14] Han, B., Wang, Y. F., 2001. Creep Analysis of Eccentricity Compressed Concrete Filled Steel Tubular Members. Engineering Mechanics, 18(6): 110-116.

[15] Neville A.M., Dilger W.H., Brooks J.J., 1983, Creep of plain and structural concrete, Construction Press, London and New York.