Basis for Design of Bearings in New the Generation of Eurocodes

摘要

A new generation of Eurocodes for structural design is currently being prepared within the Technical Committee CEN/TC 250. The revised Eurocode EN 1990 will be supplemented by the new Annex F for the basis of design of bridge bearings. Harmonised European provisions are still missing with recommended procedures for determination of basis of design and actions on bearings, taking into account various types of uncertainties. In particular, problems can occur where it is necessary to replace bearings at existing bridges according to the new procedures of Eurocodes which can lead to the design of a bigger size of new bearings despite the existing bearings served well for many years. The developed amendment of National Annex to EN 1990 for the basis of structural design should refine the design procedures. The submitted paper describes inconsistencies and main principles of the changes with respect to thermal actions.