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Author(s):	Mensinger, M.; Schaumann, P.; Stadler, M.; Schaumann, P.; Sothmann, J.
Title:	Membranwirkung von Verbunddecken bei Brand - Stand der Technik
Abstract:	Verbunddecken zeigen im Brandfall durch die Ausbildung einer Membranwirkung ein äußerst gutmütiges Tragverhalten. Nach derzeit geltenden Vorschriften in Deutschland kann dieses Tragverhalten jedoch nicht ohne weiteres berücksichtigt werden. Alle Stahlträger solcher Decken müssen gegen Brandeinwirkung geschützt werden, obwohl dies für die Lastabtragung im Brandfall oft nicht notwendig ist. In Großbritannien wird die Membranwirkung von Verbunddecken im Brand mit dem Verfahren nach Bailey bereits genutzt. Der von Bailey vorgestellte ingenieurmäßige Ansatz stellt ein praktikables Verfahren dar, das sehr gut auch für einfache Bauwerke angewendet werden kann, bei denen ein hoher Rechenaufwand unwirtschaftlich wäre. Um das Verfahren auch in Deutschland anwenden zu können, bedarf es jedoch noch einiger eingehender Untersuchungen. Membrane action of composite slabs in fire - State of the art. Composite slabs exposed to fire can support loads considerably greater than those calculated using classical design procedures. This is due to the change of the load carrying mechanism from flexural bending at ambient temperature to tensile membrane action in fire. However, this mechanism cannot be simply adopted in the Germany design rules. According to the building regulations all the steel beams have to be protected against fire although it is often not necessary in order to support the loads. In Great Britain tensile membrane action is already used with a design method developed by Bailey. It is a practicable method especially for simple constructions where high calculation effort is uneconomical. Nevertheless, further research is necessary to adopt the method in Germany.
Source:	Stahlbau 79 (2010), No. 4
Page/s:	298-305
Language of Publication:	German

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