Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 7-Day Trial for You or Your Team.

Learn More →

Optimum design of cold-formed steel portal frame buildings including joint effects and secondary members

Optimum design of cold-formed steel portal frame buildings including joint effects and secondary... Abstract In steel portal frames, cold-formed steel channel sections are increasingly used as the primary framing components, in addition to the secondary members e.g. purlins and side rails. For such framing systems, the stiffness of the joints at the eaves and apex affects the bending moment distribution, as well as the frame deflections. This paper investigates the influence of two joint configurations having full rigidity and semi-rigidity, respectively, on the optimum design of cold-formed steel portal frames. A real-coded genetic algorithm is used to search for the most cost-effective design. It is shown that through incorporating joint effects explicitly into the design process, a more appropriate balance between the joints and the member properties can be obtained, thus optimizing material use. The study then investigates the effect of secondary members on the optimum design. It is shown that incorporating the secondary members is important for portal frames having spans shorter than 12 m. For example, for a frame spacing less than 6 m, the material cost of the primary members can be reduced by up to 15%. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Steel Structures Springer Journals

Optimum design of cold-formed steel portal frame buildings including joint effects and secondary members

Download PDF
16 pages

Loading next page...
 
/lp/springer-journals/optimum-design-of-cold-formed-steel-portal-frame-buildings-including-dvUFCVG0Aq

References (45)

Publisher
Springer Journals
Copyright
2017 Korean Society of Steel Construction and Springer-Verlag GmbH Germany
ISSN
1598-2351
eISSN
2093-6311
DOI
10.1007/s13296-017-6005-9
Publisher site
See Article on Publisher Site

Abstract

Abstract In steel portal frames, cold-formed steel channel sections are increasingly used as the primary framing components, in addition to the secondary members e.g. purlins and side rails. For such framing systems, the stiffness of the joints at the eaves and apex affects the bending moment distribution, as well as the frame deflections. This paper investigates the influence of two joint configurations having full rigidity and semi-rigidity, respectively, on the optimum design of cold-formed steel portal frames. A real-coded genetic algorithm is used to search for the most cost-effective design. It is shown that through incorporating joint effects explicitly into the design process, a more appropriate balance between the joints and the member properties can be obtained, thus optimizing material use. The study then investigates the effect of secondary members on the optimum design. It is shown that incorporating the secondary members is important for portal frames having spans shorter than 12 m. For example, for a frame spacing less than 6 m, the material cost of the primary members can be reduced by up to 15%.

Journal

International Journal of Steel Structures – Springer Journals

Published: Jun 1, 2017

There are no references for this article.