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The Dynamic Behavior of Single-Span Slab Frame Bridges for High-Speed Trains
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The present study investigates the maximum deck dynamic acceleration of single-span slab frame railway bridges. It employs the parametric method of study based on a real data bank of typical bridges in Sweden. Under the assumptions explained in the methodology section, this research has three main aims. The first aim is to study the effect of wing walls on the dynamic response of the bridges. The second is to study how varying soil stiffness affects the dynamic acceleration. The last is to make a simple comparison, with respect to dynamic acceleration, between two-dimensional and three-dimensional models. Comparison between the results obtained shows that wing walls noticeably reduce the dynamic acceleration, and two-dimensional models give lower acceleration compared to three-dimensional models but not less than 50%. Moreover, dynamic acceleration, particularly in relatively larger bridges, is not affected by the soil stiffness when the soil stiffness passes a certain level. These conclusions can be used in a quick and time-saving way in practical situations for predicting and improving the dynamic response of bridges.

Place, publisher, year, edition, pages
Trita-BKN-Examensarbete, ISSN 1103-4297 ; 351
Keyword [en]
Slab frame bridge, High-speed train, Dynamic acceleration, Soil–structure interaction, Wing walls, Finite element analysis
National Category
Infrastructure Engineering
URN: urn:nbn:se:kth:diva-99382ISRN: KTH/BKN/EX-351-SEOAI: diva2:542060
Subject / course
Structural Design and Bridges
Educational program
Degree of Master - Infrastructure Engineering
Available from: 2012-09-05 Created: 2012-07-29 Last updated: 2012-09-05Bibliographically approved

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