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Author(s):	Mensinger, Martin; Gaigl, Christian
Title:
Abstract:	Ist eine Feuerwiderstandsdauer von mindestens 30 min erforderlich, muss sichergestellt werden, dass das Tragverhalten im Brandfall den statischen Anforderungen genügt. Stand der Technik, um Stahlkonstruktionen vor zu hohen Temperaturen in der außergewöhnlichen Bemessungssituation eines Brands zu schützen, ist ein passiver Brandschutz. Der Eurocode bietet aber auch rechnerische Nachweisverfahren, um den Brandschutznachweis zu erfüllen. Dabei ist die Bauteiltemperatur nach DIN EN 1993-1-2 zu bestimmen und der Tragfähigkeitsnachweis unter Berücksichtigung der Abminderung der Materialkennwerte zu führen. Zu diesem Zweck wurden in einem Forschungsprojekt der Technischen Universität München positive Effekte der Feuerverzinkung auf die Temperaturentwicklung von Stahlbauteilen unter Brandeinwirkung untersucht. Ziel ist es, eine R30-Brandschutzanforderung durch ungeschützte, feuerverzinkte Stahlbauteile zu ermöglichen. Fire resistance of hot-dip galvanized steel structures Once a fire resistance rating of at least 30 min is necessary, it has to be proofed that the load-bearing behaviour still fulfils the static demands. To protect steel constructions from too high temperatures in the accidental design situation of a fire, the state of the art is a passive fire protection. However, the Eurocode also offers calculation methods to verify the fire resistance. Here it is necessary to determine the temperature of the steel section according to DIN EN 1993-1-2 and to fulfil the ultimate limit state design, with respect to the reduction of the material characteristics. For this purpose, positive effects of hot dip galvanization on the temperature development of steel members under fire exposure are investigated in a research project of the Technical University of Munich. The aim is thus to avoid additional passive fire protection for an R30 requirement through hot dip galvanized steel members.
Source:	Stahlbau 88 (2019), No. 1
Page/s:	3-10
Language of Publication:	German

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