抄録
This study deals with seismic isolation design in industrial facilities. Design spectrum modified for long period structure is suggested. Response spectrum calculated by linear analysis using actual seismic waves is different from response spectrum of seismic design for the range of long period. In addition, friction isolator is expected to absorb seismic energy. This effect should be utilized positively in seismic design. However, seismic isolation effect depends on the friction characteristic of system. Therefore, adjustment of frictional force becomes very important. This paper shows Friction Response Spectrum for long period by the synthetic seismic wave using design spectrum. The Friction Response Spectrum is able to obtain the optimum frictional force of seismic isolation instead of non-linear analysis and estimate response magnification of long period system with friction. Moreover, equivalent damping ratio is estimated from Friction Response Spectrum for long period system. Equivalent damping ratio can easily calculate response of friction system.
