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Abstract:	Viele massive Verkehrswasserbauwerke, also Bauwerke aus Beton, Stahlbeton oder Mauerwerk, sind in Deutschland überdurchschnittlich alt. So ist beispielsweise rund ein Drittel aller Schleusen im Bereich der Wasserstraßen- und Schifffahrtsverwaltung des Bundes älter als 100 Jahre, überschreitet also die heute für solche Anlagen anzusetzende planmäßige Nutzungsdauer. Wie Schleusen weisen auch etliche Wehre und Kanalbrücken statische Besonderheiten auf, darunter heute nicht mehr gebräuchliche Bauweisen und sehr mächtige Querschnittsabmessungen. Werden Änderungen an den Bauwerken vorgenommen oder Schäden sichtbar, besteht die Notwendigkeit, das Tragwerk erneut statisch zu bemessen und im Rahmen einer Nachrechnung die erforderliche Standsicherheit rechnerisch nachzuweisen. Diese Untersuchungen können mit einem neuen BAW-Merkblatt “TbW” [1] vorgenommen werden. Im Gegensatz zum Brücken- und Hochbau war bisher für statische Bewertungen bestehender massiver Wasserbauwerke kein angepasstes Regelwerk verfügbar. New BAW Code of Practice for the assessment of the load bearing capacity of existing solid hydraulic structures Many of Germany's solid hydraulic structures, i. e. structures made from concrete, reinforced concrete or masonry, are of above-average age. For example, about a third of all locks for which the Federal Waterways and Shipping Administration (WSV) is responsible is more than a hundred years old. In other words they have exceeded the design lifetime of 100 years that is nowadays the requirement for such structures. Not only existing locks, but also numerous weirs and canal bridges show static characteristics, such as construction methods or very large cross sections, that are no longer common practice today. If any alterations are made to these structures, or if they exhibit visible damage, it is essential to re-assess the statics of the supporting structure and perform new calculations to verify its conformity with stability requirements. This re-assessment can be done with a new BAW-Code of Practice “TbW”. In contrast to bridges and buildings, no adapted regulations have been released until now for re-assessing the statics of existing solid hydraulic structures.
Source:	Bautechnik 93 (2016), No. 12
Page/s:	907-911
Language of Publication:	German

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