Structural deformation monitoring based on distributed fiber optic sensors

Abstract

Real-time health monitoring of engineering structures is crucial for improving structural safety, extending the lifespan of structures, and reducing maintenance costs. In this paper, based on the strain monitoring data from distributed fiber optic sensors, a deformation reconstruction algorithm is established to obtain structural deformation information from strain measurements. An experimental test is conducted on a reinforced concrete plate subjected to explosive loads. Distributed fiber optic strain sensors are embedded in the upper and lower surfaces of the plate, and the deformation of the concrete plate under different blast conditions is evaluated by varying the explosive yield. The comparison between the reconstructed deformation results and the actual state of the structure (obtained through high-precision laser scanning) shows that the error of the structural deformation monitoring system based on fiber optic sensors is less than 3mm.