Distortional buckling of I-steel concrete composite beams in negative moment area

- Journal title : Steel and Composite Structures
- Volume 20, Issue 1, 2016, pp.57-70
- Publisher : Techno-Press
- DOI : 10.12989/scs.2016.20.1.057

Title & Authors

Distortional buckling of I-steel concrete composite beams in negative moment area

Zhou, Wangbao; Li, Shujin; Huang, Zhi; Jiang, Lizhong;

Zhou, Wangbao; Li, Shujin; Huang, Zhi; Jiang, Lizhong;

Abstract

The predominant type of buckling that I-steel concrete composite beams experience in the negative moment area is distortional buckling. The key factors that affect distortional buckling are the torsional and lateral restraints by the bottom flange. This study thoroughly investigates the equivalent lateral and torsional restraint stiffnesses of the bottom flange of an I-steel concrete composite beam under negative moments. The results show a coupling effect between the applied forces and the lateral and torsional restraint stiffnesses of the bottom flange. A formula is proposed to calculate the critical buckling stress of the I-steel concrete composite beams under negative moments by considering the lateral and torsional restraint stiffnesses of the bottom flange. The proposed method is shown to better predict the critical bending moment of the I-steel composite beams. This article introduces an improved method to calculate the elastic foundation beams, which takes into account the lateral and torsional restraint stiffnesses of the bottom flange and considers the coupling effect between them. The results show a close match in results from the calculation method proposed in this paper and the ANSYS finite element method, which validates the proposed calculation method. The proposed calculation method provides a theoretical basis for further research on distortional buckling and the ultimate resistance of I-steel concrete composite beams under a variable axial force.

Keywords

steel concrete composite beams;distortional buckling;rotational restraint stiffness;lateral restraint stiffness;elastic foundation beam method;

Language

English

Cited by

1.

Flexural stiffness of steel-concrete composite beam under positive moment,;;;;;

1.

2.

3.

4.

References

1.

Atanackovic, T.M. and Ardeshir, G. (2012), Theory of Elasticity for Scientists and Engineers, Springer-Verlag New York Inc., New York, NY, USA.

2.

Bi, C. and Ginting, V. (2011), "Two-grid discontinuous Galerkin method for quasi-linear elliptic problems", J. Sci. Comput., 49(3), 311-331.

3.

Bradford, M.A. (1988), "Buckling of elastically restrained beams with web distortions", Thin-Wall. Struct., 6(4), 287-304.

4.

Bradford, M.A. (1992), "Lateral-Distortional buckling of steel I - Section members", J. Constr. Steel. Res., 23(1-3), 97-116.

5.

Bradford, M.A. (1998), "Distortional buckling of elastically restrained cantilevers", J. Constr. Steel. Res., 47(1-2), 3-18.

6.

Bradford, M.A. (2000), "Strength of compact steel beams with partial restraint", J. Constr. Steel. Res., 53(2), 183-200.

7.

Bradford, M.A. and Gao, Z. (1992), "Distortional buckling solutions for continuous composite beams", J. Struct. Eng., 118(1), 73-89.

8.

Bradford, M.A. and Johnson, R.P. (1987), "Inelastic buckling of composite bridge girders near internal supports", Proceedings of the ICE-Structures and Buildings, 83(1), 143-159.

9.

Bradford, M.A. and Kemp, A.R. (2000), "Buckling in continuous composite beams", Progress Struct. Eng. Mater., 2(2), 169-178.

10.

British Standards Institution (1982), Code of Practice for Design of Steel Bridge, BS5400: Part 3, London, UK.

11.

Champenoy, D., Corfdir, A. and Corfdir, P. (2014), "Calculating the critical buckling force in compressed bottom flanges of steel-concrete composite bridges", Eur. J. Environ. Civil En., 18(3), 271-292.

12.

Chen, W. and Ye, J. (2010), "Elastic lateral and restrained distortional buckling of doubly symmetric I - beams", Int.J. Struct. Stab. Dy., 10(5), 983-1016.

13.

Dekker, N.W., Kemp, A.R. and Trinchero, P. (1995), "Factors influencing the strength of continuous composite beams in negative bending", J. Constr. Steel Res., 34(2-3), 161-185.

14.

Fu, Y., Wang, J. and Hu, S. (2013), "Analytical solutions of thermal buckling and postbuckling of symmetric laminated composite beams with various boundary conditions", Acta. Mech., 225(1), 13-29.

15.

Goltermann, P. and Svensson, S. (1988), "Lateral distortional buckling: Predicting elastic critical stress", J. Struct. Eng., 114(7), 1606-1625.

16.

Jiang, L., Qi, J., Scanlon, A. and Sun, L. (2013), "Distortional and local buckling of steel-concrete composite box-beam", Steel Compos. Struct., Int. J., 14(3), 243-265.

17.

Johnson, R.P. and Bradford, M.A. (1983), "Distortional lateral buckling of unstiffened composite bridge girders", International Conference on Stability and Plastic Collapse of Steel Structures, Granada, Spain, February.

18.

Johnson, R.P. and Chen, S. (1993a), "Stability of continuous composite plate girders with U-frame action", Proceedings of the ICE-Structures and Buildings, 99(2), 187-197.

19.

Johnson, R.P. and Chen, S. (1993b), "Strength and stiffness of discrete U-frames in composite plate girders", Proceedings of the ICE-Structures and Buildings, 99(2), 199-209.

20.

Johnson, P.R. and Fan, C.K.R. (1991), "Distortional lateral buckling of continuous composite beams", Proceedings of the ICE-Structures and Buildings, 91(1), 131-161.

21.

Kalkan, I. and Buyukkaragoz, A. (2012), "A numerical and analytical study on distortional buckling of doubly-symmetric steel I-beams", J.Construct. Steel Res., 70, 289-297.

22.

Lawson, M.R. and Rackham, W.J. (1989), Design of Haunched Composit e Beams in Buildings, Steel Construction Institution, Ascot.

23.

Li, J., Huo, Q., Li, X., Kong, X. and Wu, W. (2014), "Dynamic stiffness analysis of steel-concrete composite beams", Steel Compos. Struct., Int. J., 16(6), 577-593.

24.

Ronagh, H.R. (2001), "Progress in the methods of analysis of restricted distortional buckling of composite bridge girders", Progress in Structural Engineering and Materials, 3(2), 141-148.

25.

Svensson, S.E. (1985), "Lateral buckling of beams analysed as elastically supported columns subject to a varying axial force", J. Construct. Steel Res., 5(3), 179-193.

26.

Tinh, Q.B. and Minh, N.N. (2013), "Meshfree Galerkin Kriging model for bending and buckling analysis of simply supported laminated composite plates", Int. J. Compos. Meth.-Sing., 10(3), 1350011.

27.

Vrcelj, Z. and Bradford, M.A. (2009), "Inelastic restrained distortional buckling of continuous composite T-beams", J. Construct. Steel Res., 65(4), 850-859.

28.

Wang, D. and Peng, H. (2013), "A Hermite reproducing kernel Galerkin meshfree approach for buckling analysis of thin plates", Comput. Mech., 51(6), 1013-1029.

29.

Weston, G., Nethercot, D.A. and Crisfield, M.A. (1991), "Lateral buckling in continuous composite bridge girders", The Struct. Eng., 69(5), 79-87.

30.

Williams, F.W. and Jemah, A.K. (1987), "Buckling curves for elastically supported columns with varying axial force, to predict lateral buckling of beams", J. Construct. Steel Res., 7(2), 133-147.

31.

Ye, J. and Chen, W. (2013), "Elastic restrained distortional buckling of steel-concrete composite beams based on elastically supported column method", Int. J. Struct. Stab. Dy., 13(1), 1-29.

32.

Zhou, W., Jiang, L. and Yu, Z. (2012), "The distortional buckling calculation formula of the steel-concrete composite beams in the negative moment region", Chinese J. Computat. Mech., 29(3), 446-450.

33.

Zhou, W., Jiang, L., Kang, J. and Bao, M. (2014), "Distortional buckling analysis of steel-concrete composite girders in negative moment area", Math. Probl. Eng., 2014(1), 1-10.