Experimental study of single span railway bridges

• Autor(es): Rigueiro, Constança ; Rebelo, C. ; Silva, L. Simões da
• Data: 2007
• Identificador Persistente: http://hdl.handle.net/10400.11/1350
• Origem: Repositório Científico do Instituto Politécnico de Castelo Branco
• Tipo de Documento: Documento de conferência
• Idioma: Inglês

Descrição

The main purpose of this paper is to present some results concerning the investigation that has been done by the authors regarding the dynamic response of small to médium span railway bridges using response acceleration data colleted during the measurements carried out on single span bridges on the railway track Linz-Wels, in Austria. Using output-only methods in this experimental program, it was possible to have an estimation of the igenfrequencies, mode shapes and the corresponding viscous damping. Due to the fact that the bridges were of the same type some generalizations concerning their structural behavior was possible and finite element models were calibrated in order to compute responses for real traffic. The numerical model of the bridges takes into account the track and the real boundary conditions of the decks. The measured and the computed acceleration responses of the track/bridge system are compared using two methods: the moving forces method and the interaction vehicle/track/bridge method.