Problem
| Trapezoid profiles are implemented with fully or partially perforated plates because of sound insulation issues. A calculation of resistance according to DIN 18807-1 cannot be made due to a lack of building supervision implemented and approved calculation approaches. Therefore the proof applicability has to be done according to DIN 18807-2. Newer rules and standards like prEN 1993-1-3 provide approaches to specify reduction factors for axial and flexural rigidity as a basis for an arithmetical proof of the complete profile. Numeric and analytical examinations done by Schardt and Bollinger, as well as by Schardt and Strehl are the basis of these equations. However, these equations are valid only for triangular patterns of holes because of the isotropy assumed in the derivation. This restriction was dropped in the current version of prEN 1993-1-3. Because of a missing substantiation for a generalization, the restriction will be re-implemented. Beyond that, the existing assays do not consider the stability behaviour (buckling of subfields) of thin-walled building parts. Equivalent calculation approaches are required for other areas of building with perforated thin-walled plates, too. Perforated plates come to use where the heat transfer shall be reduced by the perforation for energy conservation. The goal is to continue the existing examinations of thin-walled building parts made of perforated plates, regarding the local stability behavior and to expand them to other patterns of holes, so that
Therefore, a comparison with already existing results shall show, that based on these extended and continued approaches, the arithmetical proof for thin-walled, perforated, planar stressed (axial and shear) can be made depending on the pattern of holes and if necessary its orientation.
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