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配管の多入力応答に関する研究; 3点支持された配管試験体の3入力加振試験

Study on piping response under multiple excitations; Triple shaking table test of piping having three-supporting anchors

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

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

配管系の地震応答解析を実際の振動応答挙動に近いものとするためには、多点入力解析を取り入れる必要がある。多点入力解析手法に関する理論的検討は過去に複数実施されているものの、解析手法の妥当性について配管実挙動と比較したものは少なく、十分な検討がなされているとは言えない。そこで、本研究では、多点入力解析法の妥当性及び適用性を検証することを目的とし、本報では、複数の支持点を有する3次元配管モデルを用いた多点入力加振試験を実施した。

The piping in a nuclear power plant is laid across multiple floors of a single building or two buildings, which are supported at many anchors. As the piping is excited by multiple inputs from the supporting anchors during an earthquake, seismic response analysis by multiple excitations is needed to obtain the exact seismic response of the piping. However, few tests 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.

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