ABSTRACT
ABSTRACT: New HSR lines are now under construction in France. Dynamic analysis under the high speed trains is systematically carried by the contractor’s design office in the final design stage. This is required systematically for steel and steel concrete composite decks which are now built for all the major bridges. In the last HSR line, TGV Est some concrete bridges with complex geometry are now also checked for their dynamic behaviour. The dynamic analysis design is now commonly practicedwith commercial software bymost design offices.The dynamic response is obtained under moving loads of constant amplitudes. Moving vehicle loads with dynamic interaction methods are not used in the final design calculations. This paper presents the dynamic design calculations of HSR bridge types in France with some case studies of particular bridge types: – tied arch bridges, – half through steel girder bridges, – composite twin box and plate girder deck, – concrete portal frame.The general dynamic design strategy and the practical calculationmethodswill be explained. Some conclusions on the dynamic behaviour of the different deck structures will be pointed out.
1 HIGH SPEED RAILWAY BRIDGE TYPES
