Abstract
The FRP composite which has a lightweight and durability is used as a truss component of a FRP footbridge. In order to use FRP composite further in the industrial fields, such as engineering works, machinery, and construction, more the survey data of the vibration characteristic are required. In this research, the experimental modal analysis of the box-shaped FRP composite is carried out by using the impact hammering test, and the vibration characteristics (natural frequencies and vibration modes) are clarified. Furthermore, the theoretical modal analysis is carried out by using the general-purpose FEM (Finite element method) structural analysis tool (3D-CAD/CAE). Finally, the modal parameters of the box-shaped FRP composite are identified by performing comparison between theoretical data and experimental one.
