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Author(s):	Empelmann, Martin; Javidmehr, Sara
Title:	Anwendungsgerechte Bestimmung des &agr;cc-Beiwerts
Abstract:	Stahlbeton- und Spannbetonbauteile müssen für alle während ihrer Lebensdauer auftretenden Beanspruchungsszenarien ausreichend tragfähig sein. Dies gilt unabhängig von der jeweiligen Beanspruchungsart und -kombination sowie vom Beanspruchungszeitpunkt und von der Beanspruchungsdauer. Daher werden die zeitlichen Effekte der Beanspruchung beim Bemessungswert der Betondruckfestigkeit in dem Beiwert &agr;cc berücksichtigt, der in den Normen üblicherweise konstant angenommen wird. Bei den Bewertungen im Grenzzustand der Tragfähigkeit wird aber oft die Größe dieses Beiwerts diskutiert. Aufbauend auf der differenzierten Bestimmung des Beiwerts &agr;cc in [1] werden in diesem Beitrag mithilfe typischer Anwendungsbeispiele die Möglichkeiten des neuen Ansatzes für die Anwendung weitergehend erläutert und diskutiert. Practical determination of the factor &agr;cc Reinforced and prestressed concrete members must be resistant to all loading scenarios that are possible during their service life. This is independent of the load type and combination as well as the loading time (concrete age at loading) and the load duration. Hence, the time effects of loading are considered in the design value of concrete compressive strength with the factor &agr;cc, which is considered generally as constant values in design code provisions. For the evaluations in ultimate limit state, however, the value of this factor is often a matter of debate. Based on the introduced approach for the differentiated definition of the factor &agr;cc in [1], the potentials of its application are explained and discussed in this paper.
Source:	Beton- und Stahlbetonbau 115 (2020), No. 8
Page/s:	560-565
Language of Publication:	German

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