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Structural identification of Egnatia Odos bridges based on ambient and earthquake induced vibrations

Structural identification of Egnatia Odos bridges based on ambient and earthquake induced vibrations
Structural identification of Egnatia Odos bridges based on ambient and earthquake induced vibrations
The dynamic characteristics of two representative R/C bridges on Egnatia Odos motorway in Greece are estimated based on low amplitude ambient and earthquake-induced vibrations. The present work outlines the instrumentation details, algorithms for computing modal characteristics (modal frequencies, damping ratios and modeshapes), modal-based finite element model updating methods for estimating structural parameters, and numerical results for the modal and structural dynamic characteristics of the two bridges based on ambient and earthquake induced vibrations. Transverse, bending and longitudinal modes are reliably identified and stiffness-related properties of the piers, deck and elastomeric bearings of the finite element models of the two bridges are estimated. Results provide qualitative and quantitative information on the dynamic behavior of the bridge systems and their components under low-amplitude vibrations. Modeling assumptions are discussed based on the differences in the characteristics identified from ambient and earthquake vibration measurements. The sources of the differences observed between the identified modal and structural characteristics of the bridges and those predicted by finite element models used for design are investigated and properly justified.
modal identification, model updating, ambient vibrations, earthquake excitations, bridges
1570-761X
485-501
Ntotsios, Evangelos
877c3350-0497-4471-aa97-c101df72e05e
Karakostas, Christos
c11c80a9-0543-4ed6-a677-fe2f18454dcd
Lekidis, Vasilios
c0057001-f207-4c63-9cd5-4b8184634480
Panetsos, Panagiotis
9da8645c-ca08-4db4-a110-3cdc8d6cdd84
Nikolaou, Ioannis
5f285b91-0bdf-4e9d-af94-58241245138c
Papadimitriou, Costas
3be78708-ed90-4a1f-b18e-5fe4ec2c8de6
Ntotsios, Evangelos
877c3350-0497-4471-aa97-c101df72e05e
Karakostas, Christos
c11c80a9-0543-4ed6-a677-fe2f18454dcd
Lekidis, Vasilios
c0057001-f207-4c63-9cd5-4b8184634480
Panetsos, Panagiotis
9da8645c-ca08-4db4-a110-3cdc8d6cdd84
Nikolaou, Ioannis
5f285b91-0bdf-4e9d-af94-58241245138c
Papadimitriou, Costas
3be78708-ed90-4a1f-b18e-5fe4ec2c8de6

Ntotsios, Evangelos, Karakostas, Christos, Lekidis, Vasilios, Panetsos, Panagiotis, Nikolaou, Ioannis and Papadimitriou, Costas (2009) Structural identification of Egnatia Odos bridges based on ambient and earthquake induced vibrations. Bulletin of Earthquake Engineering, 7 (2), 485-501. (doi:10.1007/s10518-008-9074-5).

Record type: Article

Abstract

The dynamic characteristics of two representative R/C bridges on Egnatia Odos motorway in Greece are estimated based on low amplitude ambient and earthquake-induced vibrations. The present work outlines the instrumentation details, algorithms for computing modal characteristics (modal frequencies, damping ratios and modeshapes), modal-based finite element model updating methods for estimating structural parameters, and numerical results for the modal and structural dynamic characteristics of the two bridges based on ambient and earthquake induced vibrations. Transverse, bending and longitudinal modes are reliably identified and stiffness-related properties of the piers, deck and elastomeric bearings of the finite element models of the two bridges are estimated. Results provide qualitative and quantitative information on the dynamic behavior of the bridge systems and their components under low-amplitude vibrations. Modeling assumptions are discussed based on the differences in the characteristics identified from ambient and earthquake vibration measurements. The sources of the differences observed between the identified modal and structural characteristics of the bridges and those predicted by finite element models used for design are investigated and properly justified.

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e-pub ahead of print date: 5 July 2008
Published date: May 2009
Keywords: modal identification, model updating, ambient vibrations, earthquake excitations, bridges
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 372626
URI: https://eprints.soton.ac.uk/id/eprint/372626
ISSN: 1570-761X
PURE UUID: 31eaef38-3f36-4fa3-ab55-a1d271f70bca
ORCID for Evangelos Ntotsios: ORCID iD orcid.org/0000-0001-7382-0948

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Date deposited: 16 Dec 2014 12:03
Last modified: 20 Jul 2019 00:38

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Contributors

Author: Christos Karakostas
Author: Vasilios Lekidis
Author: Panagiotis Panetsos
Author: Ioannis Nikolaou
Author: Costas Papadimitriou

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