Measuring displacements of a railroad bridge using DIC and accelerometers
| Autor: | Vamsi Tolikonda, Adam Hoag, W. Andy Take, Fernando Moreu, Hoat Le, Neil A. Hoult |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Digital image correlation
Serviceability (structure) business.industry Instrumentation 020101 civil engineering 02 engineering and technology Structural engineering Accelerometer Bridge (nautical) Displacement (vector) 0201 civil engineering Computer Science Applications 020303 mechanical engineering & transports 0203 mechanical engineering Control and Systems Engineering Redundancy (engineering) Support system Electrical and Electronic Engineering business Geology |
| Zdroj: | Smart Structures and Systems. 19:225-236 |
| ISSN: | 1738-1584 |
| DOI: | 10.12989/sss.2017.19.2.225 |
| Popis: | Railroad bridges in North America are an integral but aging part of the railroad network and are typically only monitored using visual inspections. When quantitative information is required for assessment, railroads often monitor bridges using accelerometers. However without a sensor to directly measure displacements, it is difficult to interpret these results as they relate to bridge performance. Digital Image Correlation (DIC) is a non-contact sensor technology capable of directly measuring the displacement of any visible bridge component. In this research, a railroad bridge was monitored under load using DIC and accelerometers. DIC measurements are directly compared to serviceability limits and it is observed that the bridge is compliant. The accelerometer data is also used to calculate displacements which are compared to the DIC measurements to assess the accuracy of the accelerometer measurements. These measurements compared well for zero-mean lateral data, providing measurement redundancy and validation. The lateral displacements from both the accelerometers and DIC at the supports were then used to determine the source of lateral displacements within the support system. |
| Databáze: | OpenAIRE |
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