0
  • DE
  • EN
  • FR
  • Internationale Datenbank und Galerie für Ingenieurbauwerke

Anzeige

Thermal Environmental Effects on Modal Parameters and Health Monitoring of Bridge Structures

 Thermal Environmental Effects on Modal Parameters and Health Monitoring of Bridge Structures
Autor(en): , ,
Beitrag für IABSE Symposium: Sustainable Infrastructure - Environment Friendly, Safe and Resource Efficient, Bangkok, Thailand, 9-11 September 2009, veröffentlicht in , S. 21-30
DOI: 10.2749/222137809796078423
Preis: € 25,00 inkl. MwSt. als PDF-Dokument  
ZUM EINKAUFSWAGEN HINZUFÜGEN
Vorschau herunterladen (PDF-Datei) 0.11 MB

Often changes in the frequencies extracted from the vibration response are used for the detection of damage. However, these structural characteristics are also affected by the outside thermal env...
Weiterlesen

Bibliografische Angaben

Autor(en):


Medium: Tagungsbeitrag
Sprache(n): Englisch
Tagung: IABSE Symposium: Sustainable Infrastructure - Environment Friendly, Safe and Resource Efficient, Bangkok, Thailand, 9-11 September 2009
Veröffentlicht in:
Seite(n): 21-30 Anzahl der Seiten (im PDF): 8
Seite(n): 21-30
Anzahl der Seiten (im PDF): 8
Jahr: 2009
DOI: 10.2749/222137809796078423
Abstrakt:

Often changes in the frequencies extracted from the vibration response are used for the detection of damage. However, these structural characteristics are also affected by the outside thermal envonment; this effect could be large enough to mask the changes caused by the damage. So it is important to understand and predict the effect of the environmental variations on these characteristics to separate them from those caused by the damage. In this paper, we examine the trends in the frequencies variations of a reinforced concrete box girder bridge structure subjected to a nine-year long record of measured temperature, radiation, and wind speed. It is observed that the major trends in the frequency variations are parallel to the major trends in thermal environment. The paper then presents and validates an identification approach to estimate the system frequencies directly from a few measured temperature values without a detailed finite element analysis.

Stichwörter:
Brücken