実時間ハイブリッド加振によるサイリスタバルブのFRP支柱構造の耐震実験

抄録

A thyristor valve is a power electrical system in which thyristor modules are supported by metal frames and electrical isolation columns made of fiber-reinforced plastic (FRP). Since the stiffness of the FRP columns is not very large, seismic reliability is a important design factor of thyristor valves. However, it is difficult to conduct experiments on seismic response of the structure using a shaking table because of its large scale and heavy weight. Therefore, we conducted a seismic experiment on a part of the FRP columns by means of a real-time hybrid vibration experimental method, in which an actuator-excited vibration experiment and a response analysis with a computer are on-line combined and simultaneously conducted in real time. From the results of the experiments, it was found that the FRP columns were damaged only at their end-flanges and the failure of the entire structural system was not observed even with strong excitation.