Abstract
Double symmetric steel sections, known as rolled sections, are the most important components used for steel and steel hall constructions. Due to their high load bearing capacity and their flexibility resulting from a large product line-up, they are used nowadays for columns and trusses as well as for purlins and crane girders. Due to their slenderness, the sections are often vulnerable for buckling and are also confronted with various external influences and resulting combinations of different internal forces. This can be illustrated quite well by the example of an inclined roof. The purlins installed inclined owing to the inclined roof are subjected to dual-axis bending stresses by the roof structure and the snow loads and also due to the application of load at the top of the inclined section to torsion. If the purlins additionally have to protect the trusses against lateral-torsional buckling, i.e. lateral shifting of the compression chords, they must also absorb axial forces.
Currently, several design requirements exist to prove buckling resistance, however, these are often too complicated for practical application in case of the cross section evidence according to the theory of second order or in case of the equivalent member method in Eurocode 3 do not include all internal forces. Within the framework of this research project, it is planned to develop extended dimensioning rules based on the Eurocode 3 Part 1-1 Section 6.3.3 allowing practical calculations for interactions of axial force, bending moments and torsion.
Project Team
Universität Stuttgart
Institut für Konstruktion und Entwurf
Prof. Dr.-Ing. Ulrike Kuhlmann, Fabian Jörg
Research Funding
- AiF/DASt
- MPA
- Donges
- Christmann & Pfeifer
- Firma Haller
- Stahlwerk Thüringen
Project Duration
2016 - 2019