Digitale Zwillinge für Brücken mittlerer Stützweite – Pilotprojekt Brücke Schwindegg – Teil 2: Verwaltungsschale

Digital twins for medium span bridges – pilot project bridge Schwindegg – part 2: Asset Administration Shell The term ′digital twin′ is becoming increasingly popular in German-speaking countries for the digital management and condition monitoring of bridges. Although standardised developments for the use of digital twins have already been initiated in industry and medicine, the first prototypes are currently being implemented in the construction industry. The digital images are typically operated in online environments that are proprietary to the project and have limited reusability. The article investigates the integration of scaling into Building Information Modelling models, which is reaching its limits due to the real-time capability. It places existing definitions of the digital twin of the industry in the context of the construction industry. The implementation of the Isenbridge in Schwindegg as an Industry 4.0 Asset Administration Shell (AAS) is presented, building on Part 1 of this contribution. We show that an industrial, data-driven digital twin can also be implemented technically and semantically for engineering structures. The article also presents the future challenges for evaluation and control mechanisms still to be developed for the structure. We also show a possible visualisation. The goal is to develop a syntax for the AAS’ communication.     

Beurteilung des Tragverhaltens von Spannbetonbrücken mit spannungsrisskorrosionsgefährdetem Spannstahl

Die Beurteilung des Tragverhaltens von Spannbetonbrücken, die in den 1960er und 1970er Jahren in Deutschland und Österreich gebaut wurden und für deren Herstellung vergütete Spannstähle Verwendung fanden, ist seit vielen Jahren Gegenstand der Forschung mit starkem Praxisbezug. Im vorliegenden Beitrag werden nach einer theoretischen Erläuterung des Tragverhaltens die praxisrelevanten Fragestellungen wie das Vorgehen bei der Beurteilung sowie weiterführende Untersuchungen erörtert. Zudem werden aktuelle Entwicklungen in der Forschung zur Beurteilung von gefährdeten Spannbetonbrücken aufgezeigt und diskutiert. Assessment of Load Bearing Behaviour of Post‐Tensioned Concrete Bridges Equipped with Prestressing Steel Susceptible to Stress Corrosion Cracking Basics, Practical Application and Current Developments Due to extending lifetime of infrastructure in general and posttensioned concrete bridges in particular the importance of durability aspects increases. Especially older prestressed bridges built in the 1960s and 1970s in Germany and Austria are subject of these investigations. Some of these post‐tensioned concrete bridges consist of quenched and tempered prestressing wires with high susceptibility to stress corrosion cracking as we know nowadays. This article deals with recalculation, assessment and evaluating methods for post‐tensioned concrete bridges including further analytic for endangered bridges. The procedure is shown by an example of an existing multi girder bridge and furthermore, future prospects are given.