地中・地下構造物の耐震

[CS10-25] Performance-based safety assessment method of above-ground reservoirs

〇Takeshi Koike¹, Masahiro Hamano², Taku Watanabe³, Nobuhiro Hasegawa⁴, Hiromiki Oonuma⁵ (1.JICA, 2.Eight Japan Engineering, 3.Beltechno Co.ltf, 4.JFE Engineering, 5.Onuma water reseach laboratory)

Keywords:above-ground reservoir, seismic safety, performance-based safety assessment, pushover analysis

Many above-ground water reservoirs constructed more than 50 years ago are deteriorated and always threathend for seismic risk. There are not any conventional method to assess the seismic safety of above-ground water reservoirs. Proposed method includes a new performance-based seismic assessment based on Level 2 reliablity formulation which is appropriate with world standard rules requested from WTO. A numerical sample is given how to assess the seismic safety of the reservoir which is modeled to be one-degree-of-freedom vibration system.to be simplified from the symmetry of a 3D model.