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Author(s):	Goris, Alfons
Title:
Abstract:	Der Nachweis auf Durchstanzen von Einzelfundamenten ohne Durchstanzbewehrung hat sich nach Eurocode 2 (DIN EN 1992-1-1:2011 mit DIN EN 1992-1-1/NA:2013) gegenüber der bisherigen Nachweisführung grundlegend geändert. Das betrifft insbesondere den Nachweisschnitt, der im Bereich acrit ≤ 2d ungünstig bestimmt werden muss, und zwar so, dass das Verhältnis von Widerstand zur Einwirkung minimal wird. Im Regelfall erfordert die Auffindung dieses maßgebenden Rundschnitts daher eine Iteration. In diesem Beitrag wird ein einfach handhabbares Hilfsmittel vorgestellt, das die Auffindung des kritischen Nachweisschnitts in Abhängigkeit von der Grundrissgeometrie ermöglicht. Zudem kann mit den dargestellten Bemessungshilfen der Nachweis ausreichender Tragfähigkeit für rechteckige Fundamente ohne Durchstanzbewehrung, die durch mittig angeordnete Stützen mit Rechteck- oder Kreisquerschnitt beansprucht sind, in nur wenigen Bemessungsschritten erfolgen. Punching shear design of footings - design aids for isolated footings without shear reinforcement The design for punching shear of isolated footings without shear reinforcement has fundamentally changed in Eurocode 2 (DIN EN 1922-1-1:2011 combined with DIN EN 1992-1-1/NA:2013) compared to the previous design procedure. This applies in particular to the detection section that must be adversely determined in the region of acrit ≤ 2d in such a manner that the ratio of resistance to the action is minimized. As a rule, therefore, the discovery of this decisive control section requires an iteration. In this paper, an easily manageable tool is presented which allows the discovery of the critical control section depending on the floor plan geometry. In addition, with the illustrated design aids proof of sufficient load capacity for rectangular foundations without shear reinforcement, which are claimed by centrally arranged columns with rectangular or circular cross-section, could be done in just a few steps.
Source:	Beton- und Stahlbetonbau 109 (2014), No. 5
Page/s:	314-321
Language of Publication:	German

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