Countermeasure Against Excessive Deformation of Isolated Buildings to Pulse-like Ground Motions Considering Predominant Response Direction

Abstract

Many of ground motions observed in recent years not only have large acceleration amplitudes, but also often include long-period and pulse-like components. Although isolated buildings have high seismic performance against various ground motions, the responses to pulse-like ground motions can be large. The pulse-like ground motions are characterized by making the isolated buildings large deformation in one direction, and it is important to grasp a predominant response direction for design. In this paper, we study an effect of response reduction when buffer materials are installed in the predominant response direction of the pulse-like ground motions. Additionally, we propose a comprehensive response evaluation method for multiple observed ground motions in order to obtain effective design parameters of the buffer materials for multiple pulse-like ground motions.