Modal properties of simply supported railway bridges due to soil-structure interaction
2015 (English)In: COMPDYN 2015, 2015, 1709-1719 p.Conference paper (Refereed)
Resonance vibration of railway bridges has become an important design issue during the last decade due to the development of new high-speed lines. At resonance it is well known that the damping of the structure has a great influence on the final response. The current paper presents modal parameters, such as modal damping ratios and natural frequencies, derived based on a simply supported Bernoulli-Euler beam on an elastic half-space. In the current chapters of Eurocode dealing with dynamical analysis of railway bridges, the expression for the modal damping ratio is essentially empirical. The novelty of this paper is therefore two-fold: (1) provide modal damping ratios for soil-structure interaction, and (2) show that the damping should not be considered as constant for all modes but it varies depending on the particular mode shape and interaction with the soil.
Place, publisher, year, edition, pages
2015. 1709-1719 p.
Bridge, Damping, Modal properties, Non-proportionally damped, Soil-structure interaction
Geotechnical Engineering Infrastructure Engineering
IdentifiersURN: urn:nbn:se:kth:diva-174731ScopusID: 2-s2.0-84942287997OAI: oai:DiVA.org:kth-174731DiVA: diva2:867237
Conference of 5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2015 ; Conference Date: 25 May 2015 Through 27 May 2015
QC 201511052015-11-052015-10-072015-11-05Bibliographically approved