Study on piping response under multiple excitation, 1; Triple shaking table test of piping having three-supporting points

配管の多入力応答に関する研究,1; 3点支持された配管供試体の3入力加振試験

渡壁 智祥; 金子 尚昭*; 相田 重一*; 大谷 章仁*; 森泉 真*; 月森 和之; 北村 誠司 

Watakabe, Tomoyoshi; Kaneko, Naoaki*; Aida, Shigekazu*; Otani, Akihito*; Moriizumi, Makoto*; Tsukimori, Kazuyuki; Kitamura, Seiji

現行の配管耐震解析に多入力解析を適用することで配管強度評価の合理化が期待できる。本件では、3点支持配管供試体及び3振動台を用いた加振試験を実施し、多入力を受ける配管の実挙動について調査した結果をまとめたものである。

The piping in a nuclear power plant is laid across multiple floors of a single building or two buildings, which are supported at many points. As the piping is excited by multiple inputs from the supporting points during an earthquake, seismic response analysis by multiple excitations is needed to obtain the exact seismic response of the piping. However, few experiments involving such multiple excitations have been performed to verify the validity of multiple excitation analysis. To perform rational seismic design and evaluation, it is important to investigate the seismic response by multiple excitations and verify the validity of the analysis method by multiple excitation test. This paper reports on the result of the shaking test using triple uni-axial shaking tables and a 3-dimensional piping model.