Vibration Remote Monitoring System of Continuous Steel Truss Girder for the Wuhu Yangtze River Bridge

Abstract eng:
Important significance of vibration monitoring in bridge structure health monitoring is briefly introduced first in this paper. The software of ANSYS is adopted to establish the finite model of the Wuhu Yangtze River Bridge, and the detailed structure analysis and sensor optimization layout are proposed. The vibration monitoring ideas and practical plans for the Wuhu Yangtze River Bridge are proposed. The vibration monitoring subsystem which includes monitoring contents, layout of measuring points, transducers, amplifiers and methods of signal analysis and processing etc is significantly investigated. The vibration monitoring mode is designed and it divides into two types, one is real-time trigger acquisition, the other is cyclical acquisition. A set of software, which can realize the remote data acquisition, reception, analysis, real-time display, alarm and data save, is developed with the use of the advanced software platform LabVIEW. And a set of perfect vibration remote monitoring and state evaluation system is established. The structural safety monitoring and state evaluation system can realize the monitoring of the structural responses and working conditions in real time, and it can analyze the structural working state and assess the structural reliability using the information obtained from the monitoring system for the Wuhu Yangtze River Bridge. It would be able to provide the scientific decision-making bases for the bridge management and maintenance.

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