The Japan Atomic Power Company, Japan Three dimensional (3D) seismic isolation device has been developed to use for the base isolation system of the heavy building like a nuclear reactor building. The developed device is the 3D seismic isolation device that consists of the laminated rubber bearing as a horizontal isolation device and the rolling seal type air spring as the vertical isolation device in series.In this research, the 3D seismic isolation device reduction model whose scale is 1/10 is made and the workability of the device by the horizontal and vertical dynamic load is examined. Two experiment parameters are considered. One is the case that the structure of the part that the horizontal load and the vertical load contact is pin condition and the other is the case of the roller condition. As a result of the examination, the workability of the vertical direction is confirmed when the horizontal load acts.The pressure resistant ability test for the air spring is performed by the monotonic pressurization. As the result, it is confirmed that pressure resistant ability improved by restricting the side deformation of the air spring and that the material of the existing air spring can withstand high pressure use sufficiently.As the result, it is confirmed that the developed 3D seismic isolation device is applicable to the actual plant.This study was performed under the sponsership of the Ministry of Economy, Trade and Industry of Japan.
Fine structure in the matrix polymer and dispersion state of fillers for poly [tetrafluoroethylene-co-(perfluoroalkylvinylether)] (abbrev. PF A) I nano-fillers (such as organo-modified smectite, organo-modified mica, and porous silica particles) composites were investigated by wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM), and differential scanning calorimetry (DSC).From the results of TEM observation, it was found that nano-fillers were almost uniformly dispersed in PF A matrix. Further, PFA I nano-filler composites are exhibited relatively larger distance between lamellar gravity at least 30 nm estimated by SAXS than general hydrogenated crystalline polymer. This result means that fluorinated copolymer formed the thicker lamella crystal. In addition, a melting peak these nanocomposites showed in DSC thermograms was shifted to higher temperature side than that of neat PF A. It is suggested that the origin of this thermal behavior corresponds to occurrence the nucleator effect of nano-fillers to the matrix PF A.
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