Abstract
One-span planar tubular steel trusses with welded gap joints were optimized for fabrication costs. The constraints were the resistance requirements of Eurocode 3 for members and joints. A linear elastic structural analysis was done allowing for rotational stiffness of gap joints with proper eccentricities. The design variables were the height of the truss, locations of the joints at the chords and member cross-sections; cold-formed square tubes were considered. Steel grades were varied from S355 to S420 as were the numbers of joints at the chords. The particle swarm optimization algorithm was used. The results show savings of up to 24% in costs and 26% in weights achieved by varying the numbers and locations of the joints compared to the traditional shapes based on even spaced joints. Practical rules for truss layouts are proposed. PSO seems to be a good tool that is simple to implement in these kinds of engineering applications.
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References
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© 2013 Springer-Verlag Berlin Heidelberg
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Heinisuo, M., Bzdawka, K. (2013). Tubular Truss Optimization with Eccentric Joint Modelling. In: Jármai, K., Farkas, J. (eds) Design, Fabrication and Economy of Metal Structures. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-36691-8_4
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DOI: https://doi.org/10.1007/978-3-642-36691-8_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-36690-1
Online ISBN: 978-3-642-36691-8
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