Cogwheel load: a new forced vibration test for bridges?

Autor: Shota Urushadze, Jan Bayer
Rok vydání: 2021
Předmět:
Zdroj: Journal of Civil Structural Health Monitoring. 12:71-80
ISSN: 2190-5479
2190-5452
DOI: 10.1007/s13349-021-00527-3
Popis: A moving impulse load generated by a rolling heavy polygonal wheel with a constant velocity, called here the cogwheel (CW), could be used as a testing excitation for bridges. This type of dynamic load, already proposed in an earlier article, acts along the entire driving path, its intensity is adjustable, and it can be very efficient in the case of resonance. It is a combination of static and dynamic loading tests, which requires only one or a few transducers mounted on the bridge, and traffic interruption of only a few minutes. The dynamic response contains higher harmonic components, and the moving mass alters the dynamic properties continuously during the passage, which should be considered while assessing the condition of the tested structure. The high capability of indication of frequency changes is explained and demonstrated in a new scaled laboratory test. Suggestions for damage localisation are also made. It is foreseen for testing of short- and medium-sized bridges on the occasion of commissioning and periodical checks after further research.
Databáze: OpenAIRE
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