Injury Monitoring of Underground Structure Based on Optical Fiber Sensor

Under extreme conditions, ensuring the integrity and functionality of the underground infrastructure is critical for military and industrial applications, especially for the real-time monitoring and assessment of post-explosion structures. In recent years, sensor technology has gained wide attention in the field of structural health monitoring, including strain gauges, accelerometers, piezoelectric ceramic sheets, and piezoelectric thin film sensors. In particular, distributed fiber sensors are widely used in the field of civil engineering with their high sensitivity and long-distance monitoring capabilities. However, the current research on the performance evaluation of reinforced concrete structures under explosive load is relatively limited, and most applications focus on the monitoring of conventional impact and pressurized load. This paper presents a new method based on distributed fiber sensing technology to detect the damage of reinforced concrete slab under explosive load, realizes the qualitative damage monitoring of RC slab, and discusses the future research direction. The experimental results show that the distributed fiber sensor can effectively monitor the integrity of the structure under the explosion load, and the monitoring results are consistent with the observed structural damage. This study will provide a new research idea for the damage assessment of the reinforced concrete structure under the explosion load.