Computational Technology Resources - CCC

A. Silva¹, D. Ribeiro², P. Montenegro¹ and R. Calcada¹

¹CONSTRUCT-LESE, Faculty of Engineering, University of Porto, Porto, Portugal
²CONSTRUCT-LESE, School of Engineering, Polytechnic of Porto, Porto, Portugal

doi:10.4203/ccc.1.6.15

A. Silva, D. Ribeiro, P. Montenegro, R. Calcada, "Experimental assessment of damping coefficients in short-span filler-beam railway bridges", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 6.15, 2022, doi:10.4203/ccc.1.6.15

Keywords: damping coefficients, filler-beam railway bridges, logarithmic decrement method, prony method.

Abstract

Railway bridges are structures were the dynamic effects due to the passage of traffic could reach significant values, especially for speeds higher than 200 km/h, essentially due to the resonance phenomena originated by the periodic loading associated with the passage of regularly spaced axle groups of the trains. In resonance situations, the amplitude of the dynamic response of the bridges is very dependent of the damping of the train-track-bridge system including its interfaces. In framework of the In2Track2-WP5 project, experimental data of field tests performed in four filler-beam bridges of the Portuguese Railway Network were used. To evaluate the damping coefficients, the logarithmic decrement method and the Prony method were applied using the free vibration responses of the acceleration records due to passing trains. Ambient vibration tests allowed the identification of the modal parameters of the bridges, namely, the natural frequencies and modal configurations. The results of this work may contribute to future revisions of EN1991-2.

download the full-text of this paper (PDF, 6 pages, 511 Kb)

go to the previous paper
go to the next paper
return to the table of contents
return to the volume description

	Computational & Technology Resources an online resource for computational, engineering & technology publications
	not logged in - login
Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 1 PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 6.15 Experimental assessment of damping coefficients in short-span filler-beam railway bridges A. Silva¹, D. Ribeiro², P. Montenegro¹ and R. Calcada¹ ¹CONSTRUCT-LESE, Faculty of Engineering, University of Porto, Porto, Portugal ²CONSTRUCT-LESE, School of Engineering, Polytechnic of Porto, Porto, Portugal doi:10.4203/ccc.1.6.15 Full Bibliographic Reference for this paper A. Silva, D. Ribeiro, P. Montenegro, R. Calcada, "Experimental assessment of damping coefficients in short-span filler-beam railway bridges", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 6.15, 2022, doi:10.4203/ccc.1.6.15 Keywords: damping coefficients, filler-beam railway bridges, logarithmic decrement method, prony method. Abstract Railway bridges are structures were the dynamic effects due to the passage of traffic could reach significant values, especially for speeds higher than 200 km/h, essentially due to the resonance phenomena originated by the periodic loading associated with the passage of regularly spaced axle groups of the trains. In resonance situations, the amplitude of the dynamic response of the bridges is very dependent of the damping of the train-track-bridge system including its interfaces. In framework of the In2Track2-WP5 project, experimental data of field tests performed in four filler-beam bridges of the Portuguese Railway Network were used. To evaluate the damping coefficients, the logarithmic decrement method and the Prony method were applied using the free vibration responses of the acceleration records due to passing trains. Ambient vibration tests allowed the identification of the modal parameters of the bridges, namely, the natural frequencies and modal configurations. The results of this work may contribute to future revisions of EN1991-2. download the full-text of this paper (PDF, 6 pages, 511 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
Back to top	©Civil-Comp Limited 2023 - terms & conditions