Distributed monitoring of rail lateral buckling under axial loading
| Autor: | Merrina Zhang, Liam J. Butler, Fuzheng Sun, Neil A. Hoult |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Plane (geometry)
business.industry Extrapolation 020101 civil engineering 02 engineering and technology Bending Structural engineering 021001 nanoscience & nanotechnology Curvature 0201 civil engineering Buckling Deflection (engineering) Fiber optic sensor Boundary value problem 0210 nano-technology Safety Risk Reliability and Quality business Geology Civil and Structural Engineering |
| Zdroj: | Journal of Civil Structural Health Monitoring. 12:757-774 |
| ISSN: | 2190-5479 2190-5452 |
| Popis: | Distributed fiber optic sensors (DFOS) were used, for the first time, to monitor lateral buckling of a rail under axial loading with different boundary conditions. In the experiments, two types of DFOS systems were used to collect the distributed strain data, and the performance of the two systems was compared. The distributed strain data were used to develop a fitted strain plane at each cross-section along the rail, and axial strain and bending curvature were derived from the fitted strain plane. A data extrapolation method using the distributed curvature data was developed to evaluate the actual boundary conditions at the ends of the rail since they did not match assumed ideal behaviour. The distributed rail deflection along the length of rail was calculated by integrating distributed curvature data and the results were compared with the deflection measured by linear potentiometers (LPs). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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