Fiber Bragg Grating Sensors vs Strain Gauges for Static Bridge Monitoring System

As the architectural landscape evolves with advanced materials and innovative designs, the imperative to ensure the structural safety of modern edifices has escalated. Contemporary bridges must accommodate increasing traffic loads, requiring frequent inspections and maintenance to prevent structural wear. In this context, real-time monitoring systems have emerged as essential for the proactive management of both new and aging infrastructures. Fiber Optic Sensors (FOS) offer promising long-term Structural Health Monitoring (SHM) capabilities among the technologies contributing to this domain. This study evaluates the efficacy of Fiber Bragg Grating Sensors (FBGs) against traditional Strain Gauges in capturing strains, loads, and deflections in full-scale beams subjected to static loading. Comparing FOS-derived strain data with those from electrical strain gauges, our findings indicate superior reliability and adaptability of FBG sensors in structural monitoring, particularly noting their continued performance post-maximum load exposure. These insights advocate for a broader application of FBG in SHM systems, potentially enhancing the longevity and safety of bridge structures.