A SIMPLE DESIGN METHOD OF THE FRICTION DAMPER TO MEET THE DUCTILITY DEMAND

Abstract

 In this paper, a simple methodology giving the necessary control force and allowable displacement of the friction-type damper was proposed in order to meet the demand with regard to the maximum ductility of the structure. This method took into consideration the various conditions: seismic intensity, its frequency character, natural period and yielding coefficient of the structure, and so on. The results of simulations were expressed by a simple design nomograph as functions of structural natural period and yielding ratio of induced motion to yielding seismic coefficient of the structure. Finally, effect of predetermined conditions to the required performance of the friction damper was also discussed.