Free Vibration Test for Serviceability Monitoring of a Beam Structure with FBG Strain Sensor

초록

In this paper, the free vibration test of a simply supported steel beam is carried out for monitoring of serviceability of a beam structure with FBG strain sensor. To evaluate the applicability of FBG strain sensor, it is investigated by comparing the displacement and acceleration estimated from the FBG strain sensors with those from various conventional sensors such as linear variable displacement transducer (LVDT) and accelerometer. Additionally, the dynamic characteristics such as natural frequency, damping ratio and mode shape calculated by Frequency Domain Decomposition (FDD) method are also compared.