Großversuch WILD‐Brücke – versuchsgestützte Bemessung einer UHPC‐Bogenbrücke

Abstract

Full-Scale Experiment Bridge WILD -Design of an UHPC Arch Bridge based on ExperimentsThe outstanding durability of UHPC makes this material predestined for the construction of bridges. In Austria UHPC is introduced into the practice of road bridges through the realisation of the bridge WILD. The cross section of the arch, which spans 70 m, is just 6 cm thick and doesn't contain any passive reinforcement. The design is based on international recommendations on the one hand and on specific experiments on the other hand. This paper deals with the evaluation of two full-scale laboratory tests. The setup is configured for getting a broad field of results as it is necessary for approval tests. In this way, all critical design states, which are also determined by calculation, are investigated experimentally. Furthermore, the experiments cover secondary effects, which don't have any verification through practical experience but can clearly be seen in FE-results. The test results are carefully interpreted and explained by the use of simple mechanical models. The final examination of the results is figured out by means of comparison between calculation and experiment.

Beton‐ und Stahlbetonbau aktuell 3/2020

“…Der 70 m weit gespannte Betonbogen besteht aus Stäben mit einem Kastenquerschnitt in den Außenabmessungen 1,2 m × 1,2 m mit einer Wandstärke von 60 mm – im Eckbereich 100 mm (vgl. dazu auch die Veröffentlichungen aus dieser Zeitschrift). Die erforderlichen Festigkeitseigenschaften wurden durch Verwendung von ultrahochfestem Beton der Güteklasse C165/185, kombiniert mit Mikro‐Stahlfasern erreicht.…”

Part 22: High strength concrete, high performance concrete

“…Because present design codes and guidelines do not completely cover the use of UHPC in relation to the structure presented and the lack of experience, many experimental tests (including two full scale tests) gave answers to open questions for design and detailing (Freytag et al 2009). The focus of the full-scale test was the load carrying behaviour in the region of the springing.…”

Wildbrücke Völkermarkt – vorgespanntes Bogentragwerk aus UHFB‐Segmentfertigteilen

“…von der Querschnittsform abhän- gig. Anhand von Versuchsnachrechnungen aus [24] und Nachrechnungen der im Rahmen des Projektes durchgeführten Großversuche [25] wurde für maximale Fugenklaffungen von 1/3 der Querschnittshöhe eine charakteristische Länge von 2/3 · Bauteilhöhe festgelegt. Fig.…”