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Abstract:	Die Ermüdungseigenschaften von HV-Schraubengarnituren mit sehr großen Durchmessern, die üblicherweise in Tragstrukturen von Windenergieanlagen zur Anwendung kommen, sind bislang nicht abschließend untersucht. Für die Bemessung anwendbare Wöhlerlinien sind nur eingeschränkt für große Schraubendurchmesser validiert. In diesem Beitrag werden neue Ergebnisse von bislang erstmalig durchgeführten Ermüdungsversuchen an sehr großen HV-Garnituren M64 vorgestellt und in den bisherigen Erkenntnisstand zur Ermüdung großer Schrauben eingeordnet. Anhand der erweiterten Versuchsgrundlage werden normative Regelwerke für die Anwendung auf sehr große Schraubendurchmesser überprüft und maßgebende Einflussparameter wie die Mittelspannung, der Größeneinfluss und der Einfluss der Feuerverzinkung diskutiert. Fatigue of very large high-strength bolting assemblies. The fatigue characteristics of high-strength bolting assemblies (System HV) with very large diameters, as they are commonly applied in support structures for wind turbines, are not conclusively investigated yet. S-N curves, which are applicable for fatigue verification, are mostly validated on smaller bolt diameters. In this paper new experimental results of thus far unique fatigue tests on very large M64 HV-bolt sets are presented and results are integrated into the existing state of knowledge concerning fatigue of large-size bolts. Based on the enhanced test basis normative regulations are verified for very large bolt diameters and relevant influence parameter as mean stress, size effect and impact of hot-dip galvanizing are discussed.
Source:	Stahlbau 85 (2016), No. 9
Page/s:	604-611
Language of Publication:	German

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