ABSTRACT
Most infrastructure managers use condition rating as one of the most important parameters when prioritising maintenance work. Condition rating is a ‘weak’ measure loosely correlated to safety and serviceability. Projects, such as COST TU1406, propose a transition from condition to performance assessment when prioritising inspection and maintenance. Key Performance Indicators (KPI) could be Reliability, Availability, Safety, Environment and Economy. Integration of these KPI’s may call for a risk-based approach considering the associated consequences. Most existing Bridge Management Systems (BMS) do not work with geometrical models, which are essential when dealing with bridge performance. Current advancement with digitalisation using Building Information Modelling (BIM) may be the answer to overcome this problem. BIM shall among other things include realistic structural systems, load situations and deterioration modelling. Bridge management may utilise a population-based approach or a defect-based approach for deterioration modelling. The population-based approach has some advantages in relation to inspection and maintenance planning but requires spatial homogeneity. The defect-based approach may utilise the benefit of a simple digital twin but may also impose some challenges to bridge management.
