DEVELOPMENT OF A COMPUTER PROGRAM FOR THE DESIGN OF LATERALLY UNRESTRAINED STEEL BEAMS

Oladimeji B Olalusi, Tony Dirisu, Chinwuba Arum

DOI Number
-
First page
465
Last page
474

Abstract


This study presents the design results of a C-sharp based computer program developed for the design of laterally unrestrained I-section steel beams. The program was developed based on the stipulations of BS 5950 and Eurocode 3 (EC3) design standards. Several sets of steel beam models having the same cross-sectional dimensions but different laterally unrestrained span lengths were designed using the developed program, and the results were validated using an established software, Staad Pro. The design results obtained were found similar to the results obtained using Staad Pro. For a specific beam section with constant loadings, as the span length of the laterally unrestrained compression flange increases the buckling capacity reduces, thus the longer the beam, the more it is susceptible to lateral torsional buckling. Comparison of the results obtained using BS 5950 to those of EC 3 at different laterally unrestrained span lengths revealed that the areas of design sections obtained for BS 5950 are 21.5%, on the average, higher than those of EC3. Thus, beams with laterally unrestrained compression flange designed according to the requirements of EC 3 are more economical. The difference in results is because of the differences in the principles of design and measures used between the two standards.


Keywords

laterally unrestrained beams, Eurocode 3, BS 5950, C-sharp, lateral torsional buckling

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References


. Vasanthakumar, C., Ganesh, G. M., & Santhi, A. S. (2013). Structural optimization of an industrial building frame by genetic algorithm. International Journal of Engineering Science and Technology, 5(06S)

. De los Reyes, A. (2006). The role of computer-aided drafting, analysis, and design software in structural engineering practice (Doctoral dissertation, Massachusetts Institute of Technology).

. Van den Berg, G and Bredenkamp, B. (1994): The lateral torsional buckling strength of cold-formed stainless steel beam. International Specialty Conference on Cold-Formed Steel Structures. Paper 3.

. AISC (2011): Certification Standard for Steel Bridge Fabricators, American Institute of Steel Construction, Inc., One East Wacker Drive, Suite 3100, Chicago, Illinois 60601-2001.

. Kochar, H.R. and Kulkarni, S.K. (2012): Lateral-Torsional Buckling of Steel Beam, International Journal of Computational Engineering Research, Vol. 2, Issue. 6, pp. 178-181.

. Chan, C. H. (2006). Comparison Between BS 5950: Part 1: 2000 & Eurocode 3 for the Design of Multi-Storey Braced Steel Frame (Doctoral dissertation, Universiti Teknologi Malaysia).

. King, C. (2005). Steel design can be simple using EC3. New steel construction, 13(4), 24-27.

. Eurocode 3: Design of Steel Structures. Part 1-1: General Rules and Rules for Buildings, Brussels.

. BS 5950 (2000): Structural use of steelwork in Building-Code of practice for design in simple and continuous construction: Hot rolled sections. British Standards Institute, United Kingdom.

. Arum, C and Olalusi, O.B (2014): Development of Csharp-Based Algorithm for the Design of Single Storey Fixed-Feet Pitched-Roof Portal Frame, Civil and Environmental Research, 6 (8), pp. 152-162 IISTE.

. Olalusi, O. B. (2015). Development of Csharp-Based Algorithm for the Design of Single Storey Fixed-Feet Pitched-Roof Portal Frame. DOI: 10.13140/RG.2.2.34776.75520

. EN (1990): European Committee for standardization: Basis of structural design, Brussels


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