Measurements of dynamic structural responses of beam structures using FBG sensors

초록

In this paper, for efficient safety and serviceability monitoring of structures, a method of simultaneously measuring structural responses of strain, displacement, and acceleration level from FBG sensors is introduced. To test the performance of the proposed method, structural responses of a simply supported rectangular tube beam structure under free vibration state are measured from FBG strain sensors and compared with the responses measured from various conventional sensors such as electrical strain gauges (ESG), linear variable displacement transducers (LVDT) and accelerometers. Additionally, the dynamic characteristics such as natural frequencies and damping ratio are also evaluated.