| Title |
Dynamic Characteristics of a Cable-stayed Bridge Using Global Navigation Satellite System |
| Keywords |
cable-stayed bridge;global navigation satellite system;structural health monitoring;dynamic characteristics;modal analysis;사장교;구조건전성모니터링;동특성;모드해석 |
| Abstract |
This paper presents the extraction of natural frequencies and mode shapes of a cable-stayed bridge using data acquired from GNSS. The response signals of 6 GNSS measuring points installed at the Seohae cable-stayed bridge are used for analysis of dynamic characteristics. Using normalization process and a third order Butterworth filter for the measured signals, the related pass band"s signals have been isolated. Then, the acceleration data by double differentiation for these signals are obtained. Total five natural frequencies have been extracted by the fast Fourier transform and compared to the results of different studies. For the acceleration obtained from GNSS signals, the mode shapes of the bridge have been successfully extracted by TDD technique. |