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This final report provides an overview of the work carried out and of the results achieved during a 36-month research period on the topic 'Plastic member capacity of semi-compact steel sections - a more economic design'. The research work covered the investigation of the cross-section and the member buckling resistance of the so-called 'semi-compact' profiles, i.e. the Class 3 sections according to Eurocode 3. Hot-rolled and welded H-section specimens as well as rectangular structural hollow section specimens of the semi-compact range were investigated in order to analyse whether a plastic or partly plastic resistance exists, since profiles in the Class 3 range are limited by its elastic capacity by Eurocode 3 at present. In total, 45 experiments for cross-section resistance (including 10 stub-column tests) and 24 experiments for member buckling resistance were performed. Based on the experimental results, numerical models for further numerical studies were established and verified. Based on shell element models, more than 2 600 parametric finite-element (FE-) simulations were performed. Design models were then developed to describe the elastic-plastic cross-section and member resistances. The numerical results, both on a nominal basis for accuracy studies and on the basis of random parameters for safety evaluation, were used for the statistical evaluations according to the principles of EN 1990 Annex D. The results of the new design model indicated significantly enhanced capacities in the semi-compact range. A clear documentation of the model, with increased cross-section and member buckling resistance for Class 3 sections, including design examples and its benefits, concludes this work. The design proposal has been statistically verified and is ready for future application in the European design standard for steel construction. For clarification it should be stated that plastic member capacity in the semi-compact range is related to increased resistances for the

Additional information

Authors: GREINER R, Graz University of Technology, Graz (AT);KETTLER M, Graz University of Technology, Graz (AT);LECHNER A, Graz University of Technology, Graz (AT);FREYTAG B, Graz University of Technology, Graz (AT);LINDER J, Graz University of Technology, Graz (AT);JASPART J-P, University of Liège, Liège (BE);BOISSONNADE N, University of Liège, Liège (BE);BORTOLOTTI E, Arcelor Research Liège SCRL, Liège (BE);WEYNAND K, Feldmann + Weynand GmbH, Aachen (DE);ZILLER C, Feldmann + Weynand GmbH, Aachen (DE);OERDER R, Feldmann + Weynand GmbH, Aachen (DE)
Bibliographic Reference: EUR 23735 EN (2009), 136 pp. Euro: 20
Availability: Katalogue Number: KI-NA-23735-EN-S The paper version can be ordered online and the PDF version downloaded at:
ISBN: ISBN: 978-92-79-11113-6
Record Number: 200910239 / Last updated on: 2009-04-10
Original language: en
Available languages: en