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Structural health monitoring (SHM) provides a useful tool for ensuring safety and detecting the evolution of damage and performance deterioration of civil infrastructures. A great number of civil infrastructures under construction can be used as test beds for SHM systems. The Binzhou Yellow River Highway Bridge is a cable-stayed bridge in Shandong Province, China. An SHM system has been implemented on this bridge during its construction for monitoring its health status and assessing its safety for long-term services. The system includes a sensor module, a data acquisition module, a wired and wireless data transmit module, a structural analysis module, a database module, and a warning module. It is integrated by using LabVIEW software and can be remotely operated via Internet. The database is available freely to all scientists and engineers in the SHM research area. This article introduces the deployment and functions of this system, and presents the measured responses of the bridge subjected to moving vehicle loads.

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A three-layer packaged structure is proposed for an extrinsic Fabry–Perot interferometer-based optical fiber sensor in order to produce high resolution for large strains. The resolutions of three data processing algorithms including interference frequency tracking, period tracking and phase tracking are investigated and compared. Laboratory tests indicate that the proposed sensor structure can measure a strain of up to ±120 000 µε (±12%) with resolution as high as 10 µε. The sensor prototype is insensitive to fiber misalignment, enabling the study of progressive structural failures with an integrated use of the three algorithms.