Instandhaltungsstrategien als Basis für die ganzheitliche Bewertung von Stahl- und Verbundbrücken nach Kriterien der Nachhaltigkeit. Maintenance strategies as a basis for the holistic assessment of steel and composite bridges according to criteria of sustainability

The consideration of all impacts during the life cycle of a bridge is a basis for sustainability analyses. For this purpose maintenance scenarios on the basis of renewal cycles for all components of a bridge - i.e. bearings, expansion joints, caps, etc. - have to be defined. In this article three maintenance strategies for Germany are derived from an empirical database. This database is analyzed to develop input parameters which can be used for sustainability analyses. Concluding, two strategies are applied to a reference bridge as integral crossing of a motorway and evaluated by using the method of life cycle assessment, as one part of sustainability analyses.