Applications of Optical Fiber Sensors in Geotechnical Engineering: Laboratory Studies and Field Implementation at the Acropolis of Athens

Optical Fiber Sensors, specifically Fiber Bragg Grating (FBG) sensors, have proven highly effective for real-time monitoring of strain, temperature, and acceleration in geotechnical engineering, as demonstrated by both laboratory experiments and field implementation at the Acropolis of Athens. These sensors reliably captured dynamic responses under seismic loading conditions on a shaking table and high gravitational accelerations up to 100 g during centrifuge testing, showcasing their robustness across diverse loading scenarios. In the field, FBG sensors were successfully deployed on the Perimeter Wall (Circuit Wall) of the Acropolis, providing two years of continuous data despite operational challenges at the historic site. The study highlights the potential of these sensors as valuable tools for assessing structural integrity and advancing geotechnical engineering practices.

Kapogianni, E., & Sakellariou, M. (2025). Applications of Optical Fiber Sensors in Geotechnical Engineering: Laboratory Studies and Field Implementation at the Acropolis of Athens. Sensors, 25(5), 1450. https://doi.org/10.3390/s25051450