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Abstract:	Im Hochbau kommen immer öfter Stahlbetondecken mit integrierten Leitungsführungen zur Ausführung. Die Querkrafttragfähigkeit von Stahlbetondecken fällt sowohl beim Einbau größerer Leitungsquerschnitte als auch bei Anhäufung kleiner Leitungen stark ab, so dass in manchen Fällen Querkraftbewehrung erforderlich wird. Bislang fehlen Bemessungsregeln, nach denen eine örtliche Bewehrung im Bereich der Leitungsführungen dimensioniert werden könnte, was oft zur Ablehnung solcher Systeme führt. Aus diesem Grund wurden einachsig gespannte Stahlbetondecken mit unterschiedlichen Arten der Leitungsführung hinsichtlich ihrer Querkrafttragfähigkeit untersucht. Die durchgeführten Bauteilversuche zeigen, wie wirkungsvoll die Querkrafttragfähigkeit von Deckenplatten mit integrierten Leitungsführungen durch lokale Querkraftbewehrungselemente gesteigert werden kann. Efficiency of local reinforcing elements for the shear force bearing capacity of floor slabs with integrated service ducts In building construction, reinforced concrete floors with integrated ducts are increasingly executed. In case of the installation of larger duct cross sections as well as in case of the accumulation of small tubes, the shear force resistance of reinforced concrete floors drops down strongly. In such cases shear reinforcement is required. So far, there have been no design rules for the dimension of local reinforcement in the area of ducting. This often leads to a refusal of such systems. Due to these reasons, the shear force bearing capacity of one-way reinforced concrete floor slabs with different types of ducting were analysed. The experiments demonstrate the increase in shear force bearing capacity of floor slabs with integrated service ducts by the use of local shear reinforcing elements.
Source:	Beton- und Stahlbetonbau 106 (2011), No. 8
Page/s:	522-530
Language of Publication:	German

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