Total load effects of portal frame bridges in high-speed railway lines
2015 (English)In: Conference Proceedings of the Society for Experimental Mechanics Series, Society for Experimental Mechanics , 2015, 107-116 p.Conference paper (Refereed)Text
This paper studies the maximum total load effects of short span portal frame railway bridges when traversed by high-speed trains. It is generally assumed that in single span bridges the maximum stresses, displacements and accelerations occur at the mid-span section. However, this in not necessarily correct and the maximum might be located in a wide area around the mid-span. This study aims to quantify the underestimation of the mid-span assumption when calculating maximum load effects. A numerically validated 2D Vehicle-Bridge Interaction model is used to analyze the stresses, displacements and accelerations that develop during the passage of high-speed trains. These load effects are studied along the full length of the structure and compared to the maximum obtained at the mid-span section. Particular attention is given to the resonant speeds near the operational speeds of high-speed railways. The results show that significantly higher load effects can be expected. The presented study is the preliminary work for deciding on the optimum configuration of empirical field tests.
Place, publisher, year, edition, pages
Society for Experimental Mechanics , 2015. 107-116 p.
Bridge, Dynamics, High-speed, Maximum, Railway
IdentifiersURN: urn:nbn:se:kth:diva-181541DOI: 10.1007/978-3-319-15248-6_12ScopusID: 2-s2.0-84945963648ISBN: 9783319152479OAI: oai:DiVA.org:kth-181541DiVA: diva2:900552
33rd IMAC, Conference and Exposition on Balancing Simulation and Testing, 2015, 2 February 2015 through 5 February 2015
QC 201602042016-02-042016-02-022016-02-04Bibliographically approved