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Author(s):	Stark, Alexander; Hegger, Josef
Title:	Verbundverhalten von CFK-Spannbewehrungen in UHPFRC
Abstract:	Die Kombination einer vorgespannten CFK-Bewehrung (Carbonfaserverstärkter Kunststoff) und UHPFRC (Ultra High Performance Fiber Reinforced Concrete) ermöglicht es, filigrane und weitgespannte Konstruktionen zu errichten, insbesondere wenn es sich um gefaltete und gekrümmte Schalen handelt. Wegen der Unempfindlichkeit gegenüber Korrosion wird die Betondeckung der CFK-Spannbewehrung mit sofortigem Verbund allein durch das Verbundverhalten zur rissfreien Einleitung der Vorspannung bestimmt. In diesem Beitrag werden die Ergebnisse der experimentellen Untersuchungen zum Verbundverhalten vorgespannter CFK-Bewehrung vorgestellt und ein Ausblick auf die geplanten Untersuchungen an UHPFRC-Schalen gegeben. Bond behaviour of pre-tensioned CFRP tendons in UHPFRC The combination of pre-tensioned CFRP (Carbon Fiber Reinforced Plastics) tendons in UHPFRC (Ultra High Performance Fiber Reinforced Concrete) makes filigree and durable constructions with long spans possible, especially with the application of folded and curved shells. Due to a high corrosion resistance of pre-tensioned CFRP tendons, the concrete cover is governed by the bond behaviour to reach a crack-free transmission zone. In this paper the results of an experimental study on the bond behaviour of pre-tensioned CFRP tendons are presented and an outlook for planned investigations on UHPFRC shells is given.
Source:	Beton- und Stahlbetonbau 108 (2013), No. 10
Page/s:	701-710
Language of Publication:	German

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