ブレース付架構の制振装置に関する研究 : その1 履歴減衰装置の復元力特性

概要

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A new effective hysteretic damping device for improving the seismic resistance characteristics of a braced frame structure, in which the seismic energy is absorbed into the plastic deformation of the perforated steel plate installed in the device, is presented. The restoring force characteristics of the hysteretic damping device subjected to cyclic loads are investigated experimentally and analytically. Through these studies, it is clarified that the present device has a good restoring force characteristics for absorbing the seismic energy, and that the large, repeated plastic deformation of the perforated steel plate installed in the device causes no serious deteriorations of the hysteresis loop. Also, it is pointed out that any required strengh of the damping device is obtained by altering the shape of the perforated steel plate. After the verification for the restoring force characteristics, the seismic responses of a multi-storey braced shear frame having the damping device are shown with those of the ordinary braced frame, and it indicates that the damping device controls the seismic response of the braced frame satisfactorily. Thus, with the aid of the present damping device, we may possibly design a multi-storey braced frame without the damage in the main frame caused by strong earthquake ground motions, and also easily repair the braced frame by renewing the damping device after the earthquake.
1988-05-30