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Title: Second-order direct analysis of steel structures made of tapered members
Authors: Chan, SL 
Liu, SW 
Liu, YP 
Issue Date: 2018
Source: Proceedings of the 12th International Conference on Advances in Steel-Concrete Composite Structures (ASCCS 2018), Jun 27-29, 2018, University of Politecnica Valencia, Valencia, Spain 2018, p. 75-82
Abstract: Mild steel hot-rolled sections are commonly prismatic because of the rolling process with a furnace, but welded sections made from steel plates do not have such a constraint, especially when robotic welding machines are used. The weight saving could be very significant by, say, using wide flanged section at mid-span and a small flanged section at ends of a simply supported beam. However, design codes do not provide formulae for buckling check of tapered members. This paper proposes a code-free second-order direct analysis for stabilty design of steel frames made of tapered members. The design is further applied to a single layered mega space frame of 136m span. In the whole design process based on the concept of Second-order Direct Analysis, no uncertain effective length and independent member buckling checking are required.
Keywords: Tapered members
Stability design
Steel frames
Publisher: University of Politecnica Valencia
DOI: 10.4995/ASCCS2018.2018.7221
Rights: 2018, Universitat Politècnica de València, CC BY-NC-ND. This work is licensed under a Creative Commons License Attribution-NonComercial-NoDerivatives 4.0 International (
The following publication Chan, S. L., Liu, S. W., & Liu, Y. P. (2018, June). Second-order direct analysis of steel structures made of tapered members. In Proceedings of the 12th International Conference on Advances in Steel-Concrete Composite Structures. ASCCS 2018 (pp. 75-82). Editorial Universitat Politècnica de València is available at
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