Shaking table tests with large test specimens of seismically isolated FBR plants, 2; Damage test of reinforced concrete wall structure

FBR免震プラントの大型震動台試験,2; 壁体損傷試験

稲葉 学*; 穴吹 拓也*; 白井 和貴*; 矢花 修一*; 北村 誠司 

Inaba, Satoru*; Anabuki, Takuya*; Shirai, Kazutaka*; Yabana, Shuichi*; Kitamura, Seiji

This paper describes the dynamic damage test of a reinforced concrete (RC) wall structure with seismic isolation system. Shaking table tests were carried out at "E-Defense". The specimen was composed of an upper structure of 600 ton by weight and six lead-rubber bearings (LRBs) of 505 mm in diameter. The RC wall structure was designed so that the damage of the RC wall occurred between the shear force at the hardening of the rubber bearings and that at their breaking. The shaking table test was conducted consecutively by increasing the levels up to 225% of tentative design earthquake motion. Consequently, because of the increase of the structural response by the hardening of the rubber bearings, the damage of the wall structure with seismic isolation system suddenly happened. In addition, the preliminary finite element analysis simulated the test results fairly well.