Modal analysis and analysis of forced vibrations of multispan bridges

0480871 - ÚTAM 2018 RIV CZ eng J - Journal Article
Fischer, Ondřej - Pirner, Miroš
Modal analysis and analysis of forced vibrations of multispan bridges.
Acta Technica CSAV. Roč. 50, č. 2 (2005), s. 167-176, č. článku 10. ISSN 0001-7043
Institutional support: RVO:68378297
Keywords : modal analysis * exited modes analysis * correlation relations * examples on continuous beams
OECD category: Construction engineering, Municipal and structural engineering

Dynamic tests of bridges usually compare the measured bridge response under resonance with the calculated natural mode. In general, it is not easy to obtain good agreement between the measured stationary excited amplitude and the calculated mode-shape, especially with continuous multispan bridges and in the spans which are distant from the point of excitation. On a simple calculated example the authors show that this discrepancy can be caused by structural damping which makes the natural mode and the shape of the resonance amplitude different.
Permanent Link: http://hdl.handle.net/11104/0276546