Investigation of ambient noise seismological methods on a bridge model
- This presentation is to introduce the research work in the GIOTTO project funded by Federal Ministry of Education and Research (BMBF) in the frame of “early warning of earthquakes” program. The aim of this work is to investigate the application of seismological noise-based monitoring for bridge structures. A large-scale two-span concrete bridge model with a build-in post-tensioning system, which is exposed to environmental conditions, is chosen as our experimental test structure. Ambient seismic noise measurements were carried out under different pre-stressed conditions. Using the seismic interferometry technique, which is applied to the measurement data in the frequency domain, we reconstruct waveforms that relate to wave propagation in the structure. The coda wave interferometry technique is then implemented by comparing two waveforms recorded in two pre-stress states. Any relative seismic velocity changes are identified by determining the correlation coefficients and reveal theThis presentation is to introduce the research work in the GIOTTO project funded by Federal Ministry of Education and Research (BMBF) in the frame of “early warning of earthquakes” program. The aim of this work is to investigate the application of seismological noise-based monitoring for bridge structures. A large-scale two-span concrete bridge model with a build-in post-tensioning system, which is exposed to environmental conditions, is chosen as our experimental test structure. Ambient seismic noise measurements were carried out under different pre-stressed conditions. Using the seismic interferometry technique, which is applied to the measurement data in the frequency domain, we reconstruct waveforms that relate to wave propagation in the structure. The coda wave interferometry technique is then implemented by comparing two waveforms recorded in two pre-stress states. Any relative seismic velocity changes are identified by determining the correlation coefficients and reveal the influence of the pre-stressing force. The decrease of the wave propagation velocity indicates the loss of the pre-stress and weakening stiffness due to opening or event extension of cracks. We conclude that the seismological methods used to estimate velocity change can be a promising tool for structural health monitoring of civil structures.…
Autor*innen: | Chun-Man Liao |
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Weitere Person: | F. Mehrkens, C. Hadziioannou, Ernst NiederleithingerORCiD |
Dokumenttyp: | Vortrag |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2021 |
Organisationseinheit der BAM: | 8 Zerstörungsfreie Prüfung |
8 Zerstörungsfreie Prüfung / 8.2 Zerstörungsfreie Prüfmethoden für das Bauwesen | |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurbau |
Freie Schlagwörter: | Ambient seismic noise measurements; Coda wave interferometry; Pre-stress loss |
Themenfelder/Aktivitätsfelder der BAM: | Infrastruktur |
Veranstaltung: | EGU General Assembly 2021 |
Veranstaltungsort: | Online meeting |
Beginndatum der Veranstaltung: | 19.04.2021 |
Enddatum der Veranstaltung: | 30.04.2021 |
DOI: | 10.5194/egusphere-egu21-2773 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 05.05.2021 |
Referierte Publikation: | Nein |
Eingeladener Vortrag: | Nein |