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Structural health monitoring during progressive damage test of S101 bridge

  • For the last decades vibration based identification of damage on civil Engineering structures has become an important issue for maintenance operations on transport infrastructure. Research in that field has been rapidly expanding from classic modal Parameter estimation using measured excitation to modern operational monitoring. Here the difficulty is to regard to the specific environmental and operational influence to the structure under observation. In this paper, two methods accounting for statistical and/or operational uncertainties are applied to measurement data of a progressive damage test on a prestressed concrete bridge. On the base of covariance driven Stochastic Subspace Identification (SSI) an algorithm is developed to monitor and automatically compute confidence intervals of the obtained modal parameters. Furthermore, a null space based non-parametric damage detection method, utilizing a statistical χ2 type test is applied to the measurement data. It can be shown that forFor the last decades vibration based identification of damage on civil Engineering structures has become an important issue for maintenance operations on transport infrastructure. Research in that field has been rapidly expanding from classic modal Parameter estimation using measured excitation to modern operational monitoring. Here the difficulty is to regard to the specific environmental and operational influence to the structure under observation. In this paper, two methods accounting for statistical and/or operational uncertainties are applied to measurement data of a progressive damage test on a prestressed concrete bridge. On the base of covariance driven Stochastic Subspace Identification (SSI) an algorithm is developed to monitor and automatically compute confidence intervals of the obtained modal parameters. Furthermore, a null space based non-parametric damage detection method, utilizing a statistical χ2 type test is applied to the measurement data. It can be shown that for concrete bridges the proposed methodology is able to clearly indicate the presence of structural damage, if the damage leads to a change of the structural system.zeige mehrzeige weniger

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Metadaten
Autoren/innen:M. Döhler, Falk Hille, L. Mevel, Werner Rücker
Persönliche Herausgeber/innen:F.-K. Chang
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):IWSHM 2011 - 8th International workshop on structural health monitoring 2011 (Proceedings)
Jahr der Erstveröffentlichung:2011
Verlag:DEStech Publications, Inc.
Jahrgang/Band:1
Erste Seite:748
Letzte Seite:758
Freie Schlagwörter:Convidence intervals; Damage detection; Prestressed concrete bridge; Subspace identification
Veranstaltung:8th International workshop on structural health monitoring 2011
Veranstaltungsort:Stanford, CA, USA
Beginndatum der Veranstaltung:13.09.2011
Enddatum der Veranstaltung:15.09.2011
ISBN:978-1-60595-053-2
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:19.02.2016
Referierte Publikation:Nein