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Vortex-Induced Force Identification of a Long-Span Bridge Based on Field Measurement Data.
- Source :
-
Structural Control & Health Monitoring . 12/15/2023, p1-20. 20p. - Publication Year :
- 2023
-
Abstract
- Vortex-induced force (VIF) identification and modelling of a long-span bridge are often conducted in terms of aeroelastic sectional model tests in wind tunnels. However, there are uncertainties inherent in wind tunnel model tests so that vortex-induced vibration (VIV) still occurs in real long-span bridges designed according to wind tunnel test results. This paper presents a framework for VIF identification of a long-span bridge based on field-measured wind and acceleration data. The framework is composed of the four steps: (1) decompose field-measured acceleration response time histories using variational mode decomposition (VMD) method; (2) obtain velocity and displacement response time histories using frequency domain integration (FDI) method; (3) establish and update the finite element model and identify the generalized VIF time histories of the bridge; and (4) identify the parameters in the polynomial VIF models and decide the most suitable VIF model. The proposed framework is finally applied to a real suspension bridge with a recent VIV event. The results show that the proposed framework can accurately identify the generalized VIF acting on the bridge from the field-measured acceleration and wind data, and the derived most suitable VIF model can produce almost the same vortex-induced response (VIR) as the measured ones. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LONG-span bridges
*WIND tunnel testing
*FINITE element method
*SUSPENSION bridges
Subjects
Details
- Language :
- English
- ISSN :
- 15452255
- Database :
- Academic Search Index
- Journal :
- Structural Control & Health Monitoring
- Publication Type :
- Academic Journal
- Accession number :
- 174634717
- Full Text :
- https://doi.org/10.1155/2023/9361196