Response Reduction Map Under Long Period Friction System

Abstract

This paper deals with response reduction effect by friction behavior. Friction is expected to absorb seismic energy. This effect should be utilized positively in seismic design. For past several years, seismic isolation structures have been focused in seismic design of industrial facilities. Seismic isolation effect is controlled by the friction characteristic exists in friction support. Therefore, adjustment of frictional force becomes a very important. In this paper, “Response Reduction Map” for long period friction system is suggested. This map shows the range that response magnification is less than 1 and less than the response of linear system. The response reduction map without complex non-linear time history response calculation can easily obtain the response magnification. At first in this study, the response reduction map by actual earthquake wave is shown. Next, the response reduction map by the artificial earthquake wave calculated using design spectrum is shown.