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Author(s):	Loh, Lutz; Garg, Andreas
Title:
Abstract:	Beim Bau von besonders hohen Windenergieanlagen und auch im Brückenbau werden Betonfertigteile bevorzugt mit trockener Fuge gestoßen und einer Längsvorspannung überdrückt. Schubkräfte infolge Torsion und Querkraft können in der Segmentfuge lediglich über Reibung abgetragen werden, d. h. die Torsions- und Querkrafttragfähigkeit ist direkt mit dem Reibwiderstand der Fuge gekoppelt. Unter einer Biegebeanspruchung ist dieser Reibwiderstand über den Querschnitt veränderlich. Gleichzeitig kann es zu einer klaffenden Fuge im GZT kommen. Die vorherrschenden Bemessungsansätze haben es bisher nicht geschafft, eine stringente Lösung zur Torsionstragfähigkeit in Kombination mit Biegung darzulegen. Ein Ansatz gemäß Elastizitätstheorie soll hier auf das wahre Tragverhalten aufmerksam machen. Torsional structural behavior of hollow concrete cross-sections in closed and gaping segment joints - Part 1: A verification according to elasticity theory Segment joints can be found in bridge construction, but also in the construction of particularly high onshore wind turbines. In the horizontal joint of these segment towers, the prefabricated concrete elements often meet dryly, so that the shear forces have to be transmitted by friction alone. The torsional load-bearing capacity is therefore directly coupled to the friction resistance of this joint. Under a bending load, this frictional resistance varies over the cross section. At the same time, there might be a gaping joint in the ultimate limit state. The prevailing design approaches have not yet been able to present a stringent solution to the torsion load capacity in combination with bending. An approach based on the elasticity theory shall therefore draw attention to the true load-bearing behavior.
Source:	Beton- und Stahlbetonbau 115 (2020), No. 11
Page/s:	838-847
Language of Publication:	German

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