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配管系の耐震安全性評価に関する研究 : 第1報,繰り返し載荷を受ける直管の作用荷重レベルと損傷状況の比較
https://nied-repo.bosai.go.jp/records/5142
https://nied-repo.bosai.go.jp/records/514229cdcc07-988c-4caa-8f1a-51904a90ca0f
| Item type | researchmap(1) | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-03-30 | |||||||||||||||||
| タイトル | ||||||||||||||||||
| 言語 | ja | |||||||||||||||||
| タイトル | 配管系の耐震安全性評価に関する研究 : 第1報,繰り返し載荷を受ける直管の作用荷重レベルと損傷状況の比較 | |||||||||||||||||
| タイトル | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| タイトル | Study on the Estimation of Safety Margin of Piping System Against Seismic Loading : 1st Report, Damage Observations of the Straight Pipes Subjected to Cyclic Load Amplitudes of Various Levels | |||||||||||||||||
| 言語 | ||||||||||||||||||
| 言語 | jpn | |||||||||||||||||
| 著者 |
中村 いずみ
× 中村 いずみ
× 大谷 章仁
× 白鳥 正樹
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| 抄録 | ||||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||||
| 内容記述 | Fatigue failure accompanied by ratchet deformation is well known as one of the failure modes of pressurized pipes under high-level cyclic load. In this research, the process of failure of such pipes was investigated based on the experimental result in which a straight pipe failed by repeatedly increasing cyclic input displacement amplitude in stages. The strain behavior, moment-deflection relationship, and observed damage were compared with the stress level used in the seismic design of the piping system. As a result, no significant damage was observed and the moment-deflection relationship remained almost linear within the primary stress limit of 3S_m, although the strain showed elastic-plastic behavior at some measurement points. In the experiment, damage was observed at the applied load levels of approximately 5S_m of the primary stress, and 0.15 and more of the fatigue damage index, i.e., the usage factor based on the design. The test results showed that there is a certain time margin before failure occurs to actual piping systems, compared with its designed stress limitation. | |||||||||||||||||
| 言語 | ja | |||||||||||||||||
| 抄録 | ||||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||||
| 内容記述 | Fatigue failure accompanied by ratchet deformation is well known as one of the failure modes of pressurized pipes under high-level cyclic load. In this research, the process of failure of such pipes was investigated based on the experimental result in which a straight pipe failed by repeatedly increasing cyclic input displacement amplitude in stages. The strain behavior, moment-deflection relationship, and observed damage were compared with the stress level used in the seismic design of the piping system. As a result, no significant damage was observed and the moment-deflection relationship remained almost linear within the primary stress limit of 3S_m, although the strain showed elastic-plastic behavior at some measurement points. In the experiment, damage was observed at the applied load levels of approximately 5S_m of the primary stress, and 0.15 and more of the fatigue damage index, i.e., the usage factor based on the design. The test results showed that there is a certain time margin before failure occurs to actual piping systems, compared with its designed stress limitation. | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 書誌情報 |
ja : 日本機械学会論文集 A編 en : TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 巻 76, 号 766, p. 737-744 |
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| 出版者 | ||||||||||||||||||
| 言語 | ja | |||||||||||||||||
| 出版者 | 一般社団法人 日本機械学会 | |||||||||||||||||
| 出版者 | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 出版者 | The Japan Society of Mechanical Engineers | |||||||||||||||||
| ISSN | ||||||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||||||
| 収録物識別子 | 0387-5008 | |||||||||||||||||
| DOI | ||||||||||||||||||
| 関連識別子 | 10.1299/kikaia.76.737 | |||||||||||||||||
