Lateral Torsional Buckling of Thin-Walled Cold-Formed Steel Beams with Web Holes - Finite Element Analysis

Abstract:

This paper deals with the problems of analysis and design of thin-walled steel beams with circular web holes. The analysis based on the finite element method modeling is being performed on the case of perforated Sigma beams used in the storage systems and expedient flooring structures. The Sigma beams are generally used as floor girders which are subjected to the bending. In some cases the beams are not laterally restraint and the effect of lateral torsional buckling may occur. In the current engineering practice several design procedures are used to determine the bending resistance with respect to lateral torsional buckling. In this paper the results of FEM analysis are compared with the bending resistances calculated according the Eurocodedesign procedure.

• Periodical: Applied Mechanics and Materials (Volume 467)
• Pages: 425-430
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.467.425
• Online since: December 2013
• Authors: Martin Horacek*, Jindrich Melcher
• Keywords: Finite Element Method (FEM), Lateral Torsional Bucking, Reduced Thickness of Web, Substitute Cross-Section, Web Holes

References

[1] M. Horacek, J. Melcher, I. Balazs: Design Bending Resistance of Thin-Walled Steel Beams with Respect to Lateral Torsional Buckling – Methods of Calculation, in Proceedings of the 3rd European Conference on Civil Engineering (ECCIE '12) held in Paris, France, WSEAS Press, France (2012).

[2] M. Horacek, J. Melcher: St. Venant Torsion Stiffness of Thin-walled Beams with Holes, in Proceedings of 6th European Conference on Steel and Composite Structures held in Budapest, Hungary, vol. A, ECCS, Hungary (2011), p.141–146.

[3] M. Horacek, J. Melcher: St. Venant Torsion Stiffness of Thin-walled Steel Beams with Web Holes, in Proceedings of the 5th WSEAS International Conference on Engineering Mechanics, Structures, Engineering Geology (EMESEG'12) held in Cambridge, UK, WSEAS Press, Cambridge (2012).

[4] M. Horacek, J. Melcher: Mathematical Definitions and Experimentally Verification of the Torsion Characteristics of Perforated Steel Beams, in Proceedings of the 14th WSEAS International Conference on Mathematical and Computational Methods in Science and Engineering (MACMESE '12) held in Sliema, Malta, WSEAS Press, Malta (2012).

[5] CSN EN 1993-1-1 Design of steel structures - Part 1-1: General rules and rules for buildings, Czech standards institute, Prague, (2008).

[6] Information onhttp: /www. dlubal. com/rf-fe-ltb-5xx. aspx.

[7] M. Karmazinova, J. Melcher and M. Horacek.: Thin-Walled Cold-Formed Steel Beams with Holes in Lateral Flexural-Torsional Buckling, Advanced Materials Research, Vol. 743 (2013).

DOI: 10.4028/www.scientific.net/amr.743.170