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Author(s):	Raichle, Jochen; Kuhlman, Ulrike
Title:
Abstract:	Kopfbolzen, die in neuen interessanten Konstruktionsformen nahe zum freien Bauteilrand des Betons angeordnet werden, zeigen ein anderes, durch frühe Spaltrissbildung bestimmtes Tragverhalten als die üblichen randfernen Kopfbolzen. Der effektive Randabstand hat einen bedeutenden Einfluss auf die Tragfähigkeit. Für die bisher schon in DIN EN 1994-2, Anhang C gegebenen Bemessungsregeln bei einer randnahen Anordnung mit Beanspruchungsrichtung längs oder quer zum freien Bauteilrand werden Ergänzungen und Verbesserungen erläutert. Insbesondere werden Forschungsergebnisse zum Ermüdungsverhalten unter Querschub vorgestellt, die auch zu einer Bemessungsgleichung für die Ermüdungsfestigkeit von randnahen Kopfbolzen unter Querschub führen. Darüber hinaus wird für diesen Fall der Einfluss einer Ermüdungsbeanspruchung auf die statische Resttragfähigkeit näher betrachtet. Headed studs that cause splitting forces in direction of the slab thickness - Fatigue behaviour under transverse shear - enhancement of existing rules. Headed studs, arranged in interesting innovative composite cross sections near to the slab surface, show a different load carrying behaviour due to splitting forces than studs in standard situations without any edge influence. The effective edge distance has a significant influence on the carrying capacity. For the rules given in EN 1994-2, Annex C for the case of headed studs close to the concrete surface with load direction either in longitudinal or transverse direction, enhancements and improvements are explained in detail. Especially research results on the fatigue behaviour of headed studs close to the concrete surface under transverse shear are introduced und a design equation for the fatigue resistance is provided. Furthermore the influence of a fatigue loading on the residual static resistance of headed stud arranged close to the concrete surface is discussed.
Source:	Stahlbau 85 (2016), No. 2
Page/s:	153-160
Language of Publication:	German

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