Instandhaltungsstrategien als Basis für die ganzheitliche Bewertung von Stahl‐ und Verbundbrücken nach Kriterien der Nachhaltigkeit

Abstract

The consideration of all impacts during the life cycle of a bridge is essential for sustainability analyses. For this purpose maintenance scenarios based on 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

How to deal with uncertainties in the assessment of the global warming potential of bridges

“…Another paper compared several environmental impact categories and costs for two viaducts and two overpasses highlighting the differences between composite and prestressed concrete bridges [7]. A large research cluster on the sustainability of structural steel published an interesting study on the comparison of three different maintenance strategies common to Germany based on a life cycle analysis of several environmental impact categories [8]. Yet another study from Germany compared the primary energy demand, global warming potential and costs for a pedestrian bridge with 25 m span depending on the choice of material: aluminium, timber, steel or reinforced concrete [9].…”