Analysis on modal frequency variation of a cable-stayed bridge based on monitoring data
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Bibliografische Angaben
| Autor(en): |
Limin Sun
Yi Zhou |
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| Medium: | Tagungsbeitrag | ||||
| Sprache(n): | Englisch | ||||
| Tagung: | IABSE Conference: Assessment, Upgrading and Refurbishment of Infrastructures, Rotterdam, The Netherlands, 6-8 May 2013 | ||||
| Veröffentlicht in: | IABSE Conference, Rotterdam, May 2013 | ||||
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| Seite(n): | 166-167 | ||||
| Anzahl der Seiten (im PDF): | 8 | ||||
| Jahr: | 2013 | ||||
| DOI: | 10.2749/222137813806474688 | ||||
| Abstrakt: |
Although modal parameters are common indexes of structural global conditions, they would be influenced by environmental factors, such as temperature, wind and traffics; therefore it is necessary to investigate the correlations of these environmental factors and the structural modal parameters. Based on the 5 years' monitoring data recorded by Donghai Bridge Structural Health Monitoring System (DBSHMS), this paper studied the first two bending modal frequencies of the main navigation channel bridge (MNCB). The spectral analysis showed that the variation of modal frequencies possessed some dominant cycles such as 1 year, 1 week, 1 day, 12 hours and so on. By correlation analysis and regression analysis, the paper discussed the reasons for those dominant cycles of modal frequency variation from the viewpoint of temperature and traffic loading's effects. |
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