GFRP Members in Free Vibrations Field, Dynamic Parameters of Profiles and 3D Structure

The study examines the topic of dynamic identification of the pultruded elements and GFRP (Glass Fiber Reinforced Polymers) structural systems starting from the definition and quantification of the fundamental parameters of dynamic engineering, natural frequencies, modes of vibration and damping. The research illu-strates the results of an extended campaign of experimental tests on mono-dimensional elements, panels and framework systems, subject to free vibration. The boundary conditions for the structural elements are simply supported, for the 3D structure are supported configuration. The tests concern profiles with open cross-sections with one or two axis of symmetry, tubular sections and panel. As regards the all-GFRP structures have been investigated the three-dimensional frame (5m × 5m for the plan and 2.5m for the high), it is an auxiliary floor built in historical building of Vicenza, Italy.