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Elaboration of the system based code concept; Activities in JSME and ASME, 2; Development of evaluation tools based on LRFD

システム化規格概念の開発; 日本機械学会および米国機械学会における活動,2; 荷重・耐力係数設計法に基づく評価技術の開発

町田 秀夫*; 浅山 泰; 渡辺 大剛*; 北条 公伸*; 林 正明*

Machida, Hideo*; Asayama, Tai; Watanabe, Taigo*; Hojo, Kiminobu*; Hayashi, Masaaki*

本論文は、原子力プラントの構造規格基準への適用を目指して開発が進められているシステム化規格概念に関する日本機械学会(JSME)および米国機械学会(ASME)における活動について述べた4件のシリーズ発表の第2報である。本報では、高速炉の静的機器に対する構造信頼性評価法を、土木・建築分野では実用化例のある荷重・耐力係数設計法(LRFD)に基づいて開発した結果について述べる。

In the System Based Code (SBC), a reliability target is defined according to the importance of components (risk and/or failure probability), and grade of material, design, manufacture and maintenance are chosen to satisfy the reliability target. Therefore, reliability evaluation of components plays the important role of the concept of SBC. Until now, the LRFD methods were developed for burst due to internal pressure, plastic collapse due to membrane and bending stress, fatigue, limit load assessment of flawed pipe, and buckling of thin wall cylinder. This paper describes the action plans of development of the reliability assessment methods and an examination results up to date.

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