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Abstract:	Die Anforderungen an Brückenbauwerke haben sich in den vergangenen Jahren infolge der steigenden Verkehrszahlen deutlich erhöht. Gleichzeitig hat sich mit der Umstellung der Normen der rechnerische Querkraftwiderstand von Bauteilen ohne Querkraftbewehrung verringert. Als Folge lässt sich für Brückenbauwerke im Bestand mit Fahrbahnplatten ohne Querkraftbewehrung nach derzeitigen technischen Regeln oft keine ausreichende Querkrafttragfähigkeit nachweisen. Daher wurde im Rahmen eines von der Bundesanstalt für Straßenwesen (BASt) geförderten Forschungsvorhabens das Querkrafttragverhalten von Fahrbahnplatten aus Stahlbeton genauer analysiert. Der vorliegende Aufsatz beschreibt die Ergebnisse der experimentellen Untersuchungen zur maßgebenden Lastverteilungsbreite für Radlasten bei einfeldrigen, gelenkig gelagerten Platten ohne Querkraftbewehrung. Experimental investigations on the effective width for shear of single span bridge deck slabs The requirements for the load-carrying capacity of bridges have increased significantly due to rising traffic loads in the last decades. Furthermore, the design rules of the German codes have changed leading to smaller calculated shear capacities of reinforced concrete members without shear reinforcement. Therefore, the calculated shear capacity of a large number of existing concrete bridge deck slabs without shear reinforcement is not sufficient. For the above reasons, the shear-bearing behaviour of slabs has been investigated within a research programme funded by the Federal Highway Research Institute of Germany (BASt). The paper presents the results of the experimental investigations on the effective width for shear of simply supported single span slabs without shear reinforcement.
Source:	Beton- und Stahlbetonbau 108 (2013), No. 2
Page/s:	96-103
Language of Publication:	German

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