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Structural Safety Assessment of a Suspension Bridge using Analysis Model Updating

 Structural Safety Assessment of a Suspension Bridge using Analysis Model Updating
Autor(en): , , , ORCID
Beitrag für IABSE Workshop: Ignorance, Uncertainty, and Human Errors in Structural Engineering, Helsinki, Finland, 15-16 February 2017, veröffentlicht in , S. 47-50
DOI: 10.2749/helsinki.2017.047
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A reduction in concrete compressive strength is detected in the main tower of a suspension bridge. Since this strength is below the design strength, structural safety assessment is required. Ambient v...
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Bibliografische Angaben

Autor(en): (Seoul National University, Seoul, South Korea)
(Seoul National University, Seoul, South Korea)
(Seoul National University, Seoul, South Korea)
ORCID (Seoul National University, Seoul, South Korea)
Medium: Tagungsbeitrag
Sprache(n): Englisch
Tagung: IABSE Workshop: Ignorance, Uncertainty, and Human Errors in Structural Engineering, Helsinki, Finland, 15-16 February 2017
Veröffentlicht in:
Seite(n): 47-50 Anzahl der Seiten (im PDF): 4
Seite(n): 47-50
Anzahl der Seiten (im PDF): 4
DOI: 10.2749/helsinki.2017.047
Abstrakt: A reduction in concrete compressive strength is detected in the main tower of a suspension bridge. Since this strength is below the design strength, structural safety assessment is required. Ambient vibration tests (AVTs) were performed to identify current dynamic of the bridge with 56 dense installation point of accelerometers. Manual tuning method is applied to update analysis model based on measured dynamic properties. As a result, errors between the analysis and measurement of the natural frequencies are reduced from 9% to 4%. Automated model updating method with sensitivity-based optimization is additionally applied to update analysis model. Finally, update model has errors of natural frequencies below 2%. Utilizing the updated model, structural safety assessment is performed considering live load, wind load and seismic load.
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