Structural Health Monitoring System for a High-Speed Railway X-Arch Bridge using Wireless Networks

Abstract

Zhaoqing Xijiang steel box x-arch bridge on the Nanning-Guangzhou railway is located at the mountain area near the southern coast of China. The main span is 450 m, which is the longest among the same type of bridges. The average occurring frequency of typhoon is about 3 times per year, and the maximum wind speed exceeds grade 12 (32.6 m/s). To monitor the behavior of the bridge under the train and environment actions, an online health monitoring system based on DASP-MTS (Data Acquisition and Signal processing-Monitoring Test System) was established, which can transfer real-time monitoring data to cloud server via 3G wireless network. This monitoring system works in a browser/server frame, providing an easy remote monitoring method. Users can obtain real-time data from this system at any location. Field measurement of wind characteristics are discussed in this paper.