Bridge Vibration Analysis Using Fiber-Optic Bragg Sensors with an Inclined Grid

The article presents a method for identifying and analyzing the selected dynamic characteristics of deformation of a bridge structure using fiberoptic Bragg sensors with an inclined lattice. This paper describes the basic principle of operation of sensors based on a fiber Bragg lattice. Vibration modes were also determined using time series analysis with a high sampling rate. With the help of appropriate mathematical models (filters) and spectral analysis, it was possible to identify and describe the oscillation frequencies of the structure, which were compared with the theoretical model described by the dynamic behavior of the bridge. This model has been tested on a car and pedestrian bridge. With the help of the developed mathematical and experimental model, data were processed, and vibration modes were determined during vibration of bridge structures.