International Session (Structural Engineering)

[CS2-20] AMPLITUDE DEPENDENCE OF DAMPING RATIO OF REINFORCED CONCRETE SLAB UNDER DIFFERENT LOADING STATES

〇Sania Gohar¹, Yasunao Matsumoto¹, Takeshi Maki¹ (1.Saitama University)

Keywords:Structural health monitoring, vibration, dynamic response, amplitude dependence, loading states

Vibration-based structural health monitoring (SHM) is based on the fact that changes in structural properties are associated with structural damages, which lead to changes in the dynamic characteristics of structures, such as natural frequency, mode shape, and modal damping ratio. In this research, the focus was laid on the amplitude dependence of modal damping ratio of reinforced concrete (RC) slab models at different loading states. Free vibration tests were performed on slab specimens at different locations and loading states, and the relation between modal properties identified and vibration amplitude was investigated.