Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Traffic-induced vibrations on a two span composite railway bridge: Comparison of theory and measurements
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Design and Bridges. KTH, School of Engineering Sciences (SCI), Centres, The KTH Railway Group. (Järnvägsgruppen-Infrastruktur)
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The economic and technologic development experienced by the society in the last decades has caused the demand of a new type of faster and more comfortable transport. This type of demand has been covered by the air transport, the road transport and the railway transport.

This situation where the society demands an improvement in her quality of life is the best situation for the birth of the high speed trains. Different studies carried out in the transport field have demonstrated that for distances between four hundred and one thousand of kilometres, the high speed trains provide a lower travelling times than the rest of the transports.

These types of high speed trains have increased the axle loads and the average speeds, thus generally a dynamic analysis is required by the ERRI in all the railway bridges when the train speed is higher than 200 Km/h. Besides, when the train speed is going to be higher than 200 Km/h, the vibrations induced in the bridge can reduce the service life of the vehicles and structure, and generally, this fact leads to become the dynamic effect in the principal factor to take into account in order to design the structure. Therefore, an important knowledge in railway bridges dynamic is required to not to oversize the structures with the consequent economic cost.

The purpose of this thesis is to study the possibility of accurately predicting the dynamic response of an existing railway bridge, subjected to the high speed train Gröna Tåget, implementing a simplified 2D finite element model with the aid of the program Abaqus. The bridge chosen is the Lögdeälv Bridge, a two spans composite bridge, located along the Bothnia Line (the new Swedish high-speed line), between the localities of Nordmaling and Rundvik.

The measured eigenfrequencies due to bending modes of vibration are used for updating the model and then, these frequencies and the accelerations measured are used to compare and validate the different 2D updated models. The parameters used to update the models are; the damping coefficient of the structure, the mass and the stiffness of the bridge, and the supports stiffness. Finally it is concluded that the best model is achieved when the rotational support stiffness is modified in the two extremes supporters of the bridge.

Place, publisher, year, edition, pages
2011. , 106 p.
Series
Trita-BKN-Examensarbete, ISSN 1103-4297 ; 321
Keyword [en]
High speed train, dynamic analysis, railway bridge, vibrations, Gröna Tåget, finite element model, eigenfrequencies, model updating
Identifiers
URN: urn:nbn:se:kth:diva-36360ISRN: KTH/BKN/EX-321-SEOAI: oai:DiVA.org:kth-36360DiVA: diva2:430659
Subject / course
Structural Design and Bridges
Educational program
Master of Science in Engineering - Urban Management
Uppsok
Technology
Supervisors
Available from: 2011-07-14 Created: 2011-07-11 Last updated: 2011-07-14Bibliographically approved

Open Access in DiVA

José_exjobb(3867 kB)2181 downloads
File information
File name FULLTEXT01.pdfFile size 3867 kBChecksum SHA-512
743054b672ac2c3b03ec25968e1ec0935e518220d821e483b78c9c895eac86abb99bae09ac1b71b43f09c71224e936bbb7681474d696d71be0c8f3f782b68413
Type fulltextMimetype application/pdf

By organisation
Structural Design and BridgesThe KTH Railway Group

Search outside of DiVA

GoogleGoogle Scholar
Total: 2181 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 352 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf