Shaking Table Tests of Lead Inserted Small-Sized Laminated Rubber Bearing for Nuclear Component Seismic Isolation

To assure seismic isolation performance against design and beyond basis earthquakes in the nuclear facility components, lead inserted small-sized laminated rubber bearings (LRB), which has a 10 kN vertical load, have been designed quasi-statically tested to validate their mechanical properties previous studies. Following this study, shaking tests of these full-scale LRBs are performed discussed paper with dummy mass system investigate actual performance, dynamic characteristics LRBs, consistency LRB’s quality, so on. study three beam structures (S1–S3) different natural frequencies were installed both on table supported by four LRBs: (1) S1: structure close frequency; (2) S2: peak input spectral (3) S3: high-frequency region. The test results described various levels OBE (Operating Basis Earthquake), SSE (Safe Shutdown BDBE (Beyond Design compared analysis parameters. From tests, it is confirmed that reveal an adequate as intended LRB design.