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多入力を受ける配管の応答挙動に関する考察,1; 2点支持された配管供試体の応答

Investigation on response behavior of piping subjected to multiple input, 1; Response of piping model supported by two point

渡壁 智祥; 北村 誠司 ; 月森 和之; 森泉 真*; 宮本 明倫*; 森下 正樹 

Watakabe, Tomoyoshi; Kitamura, Seiji; Tsukimori, Kazuyuki; Moriizumi, Makoto*; Miyamoto, Akinori*; Morishita, Masaki

原子力施設に設置される配管は各階や隣接する建屋間に跨り、複数の支持構造物を介して建屋に取り付けられるため、地震時には多入力応答を示す。本研究では、多入力問題を考えるにあたって、2点で支持される単純な系を対象として、多入力配管挙動について実験・解析の両面から検討した。単純化モデルを用いた予備解析では、2入力間条件の違いが応答へ及ぼす影響について調査し、2支持点を有する配管供試体を用いた2入力振動実験では、多入力解析手法の可能性について検討した。

Piping in a nuclear power plant puts across each floor at the same building or between two buildings, and it has many supported points. Therefore, the piping should be as a model subjected to multiple inputs in seismic analysis, but there isn't almost knowledge concerned with analysis for multiple inputs. In this paper, the analysis by using TDOF model having two supported points, and the shaking test by using U-bend piping test piece having two supported points was performed to investigate response of piping subjected to multiple inputs. As a result, the possibility of response analysis for piping subjected to multiple inputs was confirmed.

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