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Author(s):	Haveresch, Karl-Heinz
Title:
Abstract:	Es wird über die Erfahrungen berichtet, die bei der Nachrechnung und Verstärkung von mehr als 250 älteren Brücken gewonnen wurden. Die Verfahrensschritte, die methodischen und technischen Lösungsansätze sowie die typischen Ergebnisse werden dargestellt und bewertet. Die im Beitrag gegebenen Empfehlungen für die Auslegung und notwendige Ergänzung der Nachrechnungsrichtlinie werden unter dem Vorbehalt einer zukünftigen bauaufsichtlichen Regelung gegeben. Experiences concerning structural assessment and strengthening of older bridges While analysing current traffic volume on German highways, an exceedance of the planned bearing capacity for most of the highway bridges was detected. This exceedance is mainly caused by increasing daily traffic volume, including increasingly heavy trucks with a rising number of axes and load size. In fact, strengthening of most of these bridges becomes necessary to ensure future long-term serviceability of the German Autobahn system. In the meantime, first experiences in terms of structural assessment and strengthening of older highway bridges were collected. Therefore, this report presents gained experiences concerning the refurbishment of more than 250 older highway bridges. Furthermore, recommendations for application, interpretation and evolution of technical regulations are given. For these purposes process steps, methods of choice and technical solutions are described.
Source:	Beton- und Stahlbetonbau 110 (2015), No. 2
Page/s:	96-112
Language of Publication:	German

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