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Abstract:	Die Verbundmittel in Stahl-Beton-Verbundkonstruktionen müssen einen ausreichenden Widerstand gegenüber Beanspruchungen orthogonal zur Verbundfuge aufweisen, um einerseits das Abheben der Betonplatte vom Stahlträger, andererseits die gegenseitige Penetration von Stahlträger und Betongurt zu verhindern. Während in der Vergangenheit das Verankerungsverhalten von Kopfbolzendübeln umfassend untersucht und beschrieben wurde, existieren für zug- und druckbeanspruchte Verbunddübelleisten bisher keine systematischen Untersuchungen. Im vorliegenden Beitrag wird daher das Tragverhalten von Verbunddübelleisten unter Beanspruchungen orthogonal zur Verbundfuge durch nichtlineare, dreidimensionale FE-Untersuchungen analysiert. Das anhand von Versuchen aus der Literatur verifizierte FE-Modell wird verwendet, um die Tragmechanismen des Zusammenwirkens von Stahldübel und Beton herauszuarbeiten und bisher nicht untersuchte Einflüsse, wie die Wirkung von Querbewehrung im Betondübel und den Maßstabseffekt der Verankerungstiefe, zu klären. Im zweiten der zusammengehörenden Fachaufsätze fließen die hier gewonnenen FE-Ergebnisse in die Entwicklung von Ingenieurmodellen und Bemessungsansätzen ein. Rib shear connectors with concrete break out failure subjected to tension or compressive loads - Part 1: Finite Element Analysis The shear connectors in steel-concrete composite structures have to provide sufficient resistance against stresses acting orthogonally to the shear connection leading either to uplift of the concrete slab or mutual penetration of the steel girder and the concrete. While the anchoring behavior of headed studs has been extensively researched in the past, investigations in the load bearing behavior of composite dowels subjected to tension and compressive loads are missing, to date. Therefore, the present paper describes finite element investigations in the load bearing behavior of composite dowels exposed to loads acting orthogonally to the shear connection. The FE-model, validated against tests from literature, is used to investigate the transfer of stresses between steel dowel and concrete and to clarify the influence of different parameters, like the effect of transversal reinforcement in the concrete and the size effect of the anchorage depth. In the second part, the FE-results are used to derive engineering models and design approaches for composite dowels subjected to tension or compression.
Source:	Beton- und Stahlbetonbau 113 (2018), No. 5
Page/s:	348-359
Language of Publication:	German

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