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

Content Provider	Springer Nature Link
Author	Ntotsios, Evaggelos Karakostas, Christos Lekidis, Vasilios Panetsos, Panagiotis Nikolaou, Ioannis Papadimitriou, Costas Salonikos, Thomas
Copyright Year	2008
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 (FEM) 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 FEMs 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 FEMs used for design are investigated and properly justified.
Starting Page	485
Ending Page	501
Page Count	17
File Format	PDF
ISSN	1570761X
Journal	Bulletin of Earthquake Engineering
Volume Number	7
Issue Number	2
e-ISSN	15731456
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-07-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Modal identification Model updating Ambient vibrations Earthquake excitations Bridges Structural Geology Hydrogeology Geophysics/Geodesy Civil Engineering Geotechnical Engineering
Content Type	Text
Resource Type	Article
Subject	Building and Construction Geophysics Geotechnical Engineering and Engineering Geology Civil and Structural Engineering

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