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Dynamic Stiffness Identification of Portal Frame Bridge-Soil System using Controlled Dynamic Testing
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges. ELU Consulting Engineeeirng, Sweden.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges. ELU Consulting Engineeeirng, Sweden.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges. Swedish Transport Administration, Sweden.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges. ELU Consulting Engineeeirng, Sweden.
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2017 (English)In: X International Conference on Structural Dynamics, EURODYN 2017, Elsevier, 2017, Vol. 199, 1062-1067 p.Conference paper (Refereed)
Abstract [en]

Short-span portal frame bridges are predominant in Swedish railway lines. Although it is well known that the dynamic response of these partially-buried rigid structures is governed by the surrounding soil, the effect of the soil is usually neglected in the train-induced vibration analysis due to the expensive computational costs. This paper focuses on studying the effect of the surrounding soil conditions on the dynamic response of portal frame railway bridges. The study aims to validate the accuracy of simplified numerical models in evaluating the dynamic stiffness and modal properties of the bridge-soil system. To achieve this aim, a model updating method was used for FE model calibration of a full-scale portal frame bridge using measured frequency response functions. Both measured and computed responses identify the substantial contribution of the surrounding soil on the global damping of the system and highlight the importance of the soil-structure interaction on the dynamic response of these structures.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 199, 1062-1067 p.
Series
Procedia Engineering, ISSN 1877-7058 ; 199
Keyword [en]
Dynamic Stiffness identification, Frequency response functions, Full-scale test, Portal frame bridge, Soil-Structure interaction
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:kth:diva-215897DOI: 10.1016/j.proeng.2017.09.293Scopus ID: 2-s2.0-85029901442OAI: oai:DiVA.org:kth-215897DiVA: diva2:1150313
Conference
10th International Conference on Structural Dynamics, EURODYN 2017, Faculty of Civil and Industrial Engineering, Rome, Italy, 10 September 2017 through 13 September 2017
Note

QC 20171018

Available from: 2017-10-18 Created: 2017-10-18 Last updated: 2017-10-18Bibliographically approved

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