Monitoring a concrete bridge girder with the coda wave interferometry method
| Main Authors: | WANG, XIN, NIEDERLEITHINGER, ERNST, CHAKRABORTY, JOYRAJ, KLIKOWICZ, PIOTR |
|---|---|
| Format: | Proceeding Journal |
| Bahasa: | eng |
| Terbitan: |
, 2019
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3520603 |
Daftar Isi:
- Concrete bridges play an important role in the construction of urban infrastructure. Environmental factors and excessive use accelerate the aging of bridges. The collapse of bridges can cause casualties and serious economic losses. Hence, more and more people realize the necessity of structural health monitoring. Coda Wave Interferometry (CWI) technique for ultrasonic data is considered as one of the most promising methods to monitor concrete structures due to its high sensitivity to weak perturbations in a heterogeneous medium. Large structures can be monitored using a limited number of sensors. Previous research has shown that CWI successfully detects temperature and stress changes in laboratory size concrete specimens. However, up to now, because of the complexity of the outdoor environment, CWI technique hasn't been implemented on any real bridges. In this paper, a 36 meters long bridge girder in Gliwice, Poland, instrumented with different types of sensors (embedded ultrasonic sensor, strain gauges and thermocouple) inside the middle part will be studied. The bridge was monitored for 5 days. For preliminary evaluation, the influence of traffic and temperature could be detected and future improvement for long term monitoring could be discussed and planned.