Output-only modal identification of existing reinforced concrete structures

S. El-Borgi, S. Choura, C. Ventura, M. Neifar, M. Annabi, M. Baccouch, R. Maalej

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper summarizes the application of a rational methodology for the structural assessment of existing reinforced concrete Tunisian structures which include bridges and wheat silos. This methodology is based on ambient vibration measurement of the structures, identification of the modal signature and finite element model updating. Detailed finite element models of the structures were first created to determine judicious locations of the measurement points. Ambient vibration tests were then conducted using a data acquisition system with nine force-balance accelerometers placed at selected locations. The Enhanced Frequency Domain Decomposition (EFDD) technique was applied to extract the modal signature of the structures. The finite element models were updated in order to obtain a reasonable correlation between experimental and numerical modal properties. The primary objective of the paper is to demonstrate the use of the EFDD technique to extract the dynamic characteristics of the selected structures from available operational response measurements. A secondary objective is to combine the measured modal signature with model updating for assessing the structural condition of the selected structure. The proposed methodology was applied to two case studies.

Original languageEnglish (US)
Title of host publicationProceedings of the 1st International Operational Modal Analysis Conference, IOMAC 2005
PublisherAalborg University
ISBN (Print)9788781606000
StatePublished - 2005
Event1st International Operational Modal Analysis Conference, IOMAC 2005 - Copenhagen, Denmark
Duration: Apr 26 2005Apr 27 2005

Publication series

NameProceedings of the 1st International Operational Modal Analysis Conference, IOMAC 2005

Conference

Conference1st International Operational Modal Analysis Conference, IOMAC 2005
CountryDenmark
CityCopenhagen
Period4/26/054/27/05

ASJC Scopus subject areas

  • Decision Sciences(all)

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