Study on Response Spectrum of Elast-Plastic System(Mechanical Systems)

Abstract

For the past several years, large scale earthquakes happened. A lot of industrial facilities were damaged. For example, a nuclear power plant was stopped in The Niigataken Chuetsu-oki Earthquake (2007). These earthquakes have larger acceleration level than the seismic design level. Therefore, the earthquake proof measures are required. There are many dampers as the energy dissipating devece. For example, oil damper, visco-elastic damper, magnetic damper, friction damper, elast-plastic damper, and so on. The friction damper and elast-plastic damper are utilized for the large scale earthquake. This paper deals with the response reduction effect by elast-plastic behavior. Elast-plastic behavior is expected to absorb the seismic energy. In this paper, bi-linear model and R-O model are focused as the elast-plastic model. At first, the comparison of the characteristics of these models is taken place. Next, the response spectrum for seismic design is proposed.