期刊
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
卷 18, 期 2, 页码 610-620出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1475921718764081
关键词
Bridge; weigh-in-motion; bridge weigh-in-motion; virtual monitoring; orthotropic steel deck; fatigue evaluation
资金
- China Scholarship Council
- National Natural Science Foundation of China [51178178, 51178177]
- Science Foundation Ireland
- Hunan Provincial Natural Science Foundation of China [13JJ2019]
This article outlines a Virtual Monitoring approach for fatigue life assessment of orthotropic steel deck bridges. Bridge weigh-in-motion was used to calculate traffic loads which were then used to calculate virtual strains. Some of these strains were checked through long-term monitoring of dynamic strain data. Field tests, incorporating calibration with pre-weighed trucks and monitoring the response to regular traffic, were conducted at Fochen Bridge, which has an orthotropic steel deck and is located in Foshan City, China. In the calibration tests, a 45-t 3-axle truck ran repeatedly across Lane 2, the middle lane in a 3-lane carriageway. The results show that using an influence surface to weigh vehicles can improve the accuracy of the weights and, by inference, of remaining service life calculations. The most fatigue-prone position was found to be at the cutout in the diaphragms. Results show that many vehicles are overweight-the maximum gross vehicle weight recorded was 148 t, nearly 3.6 times heavier than the fatigue design truck.
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