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International Journal of Steel Structures

Erschienen in:

30.04.2018

Optimizing Structures with Semi-Rigid Connections Using the Principle of Virtual Work

verfasst von: Alex Elvin, Johnnie Strydom

Erschienen in: International Journal of Steel Structures | Ausgabe 3/2018

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Abstract

In this paper, the virtual work optimization method (VWOM) has been generalised to consider structures with semi-rigid connections. The VWOM is an automated method that minimizes the mass of a structure with a given geometry, multiple deflection criteria and load cases, while adhering to Design code requirements. In the optimization process, members are selected from a discrete database to meet all strength and stiffness criteria. Connections are modelled using rotational springs, allowing some moment transfer. The rotational stiffness of each connection can be varied form rigid to pinned. The example of a pitched roof frame is used to explain the method. Two case studies are considered: (i) a three-storey two-bay and (ii) a four-storey three-bay office building. The VWOM produced results up to 26.7% lighter than results in the literature. Furthermore, the structures were optimized for a range of rotational stiffness, where all connections in the structure were assumed to have the same rotational stiffness. Characteristic jumps in the optimized mass versus rotational stiffness were observed.

Vorheriger Artikel Temporary Shear Brace Design Method for Steel Box Girder Viaduct in Transverse Block Construction

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Titel: Optimizing Structures with Semi-Rigid Connections Using the Principle of Virtual Work
verfasst von: Alex Elvin
Johnnie Strydom
Publikationsdatum: 30.04.2018
Verlag: Korean Society of Steel Construction
Erschienen in: International Journal of Steel Structures / Ausgabe 3/2018
Print ISSN: 1598-2351
Elektronische ISSN: 2093-6311
DOI: https://doi.org/10.1007/s13296-018-0043-9

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