Two probabilistic life-cycle maintenance models for deteriorating civil infrastructures

The purpose of this paper is to describe and compare two maintenance models for deteriorating civil infrastructures that can be used to insure an adequate level of reliability at minimal life-cycle cost. These models, referred to Rijkswaterstaatʹs model and Frangopolʹs model have been independently developed by the authors of this paper and their associates. The former model has been applied by the Netherlands Ministry of Transport, Public Works and Water Management (Rijkswaterstaat). It can be used for justification and optimisation of maintenance measures. The latter model contributed to the further development of the bridge management methodology that has been set up by the UK Highways Agency.