2011 Fiscal Year Final Research Report
Establishment and verification of the limit state design of the thin wall pipeline considering environmental and earthquake resistance
| Project/Area Number |
20248026
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | Kobe University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
UCHIDA Kazunori 神戸大学, 大学院・農学研究科, 教授 (80111946)
INOUE Kazuya 神戸大学, 大学院・農学研究科, 助教 (00362765)
MOHRI Yoshiyuki 独立行政法人農業・食品産業技術総合研究機構, 農村工学研究所, 領域長 (90373224)
ARIYOSHI Mitsuru 独立行政法人農業・食品産業技術総合研究機構, 農村工学研究所, 研究員 (10414442)
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| Project Period (FY) |
2008 – 2011
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| Keywords | 土質力学 / 応用力学 |
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| Research Abstract |
In designing, deflection and stress of the pipe are calculated through structural analysis based on bending ring stiffness EI/D^3. The pipes with equivalent bending ring stiffness would have the same behavior in design. However, it is easily understandable that the behavior of pipe may be influenced not only by EI/D^3, but also by the relationships between E and I. In this research, pit tests, centrifuge tests under 30G and large shaking table tests with 800gal input wave for buried flexible pipes were conducted to evaluate the effects of pipe thickness on the static and dynamic behavior. As a result, it was found that the larger bending strain and radial stress of the pipe occurred with the thinner wall. This result suggests that the probability of the buckling of the pipe is higher on thinner pipes. It is evident that the pipelines for irrigation should be designed in consideration of this fact.
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[Journal Article] Vertical loading tests for buried flexible pipes with equivalent ring stiffness2010
Author(s)
Kawabata, T., Izumi, A., Hanazawa, T., Mohri, Y., Ling, H. I. and Ariyoshi, M.
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Journal Title
Proceedings of 20th International Offshore and Polar Engineering Conference
Peer Reviewed
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[Journal Article] Effect of pipe thickness on the behavior of flexible pipes with equivalent bending ring stiffness2009
Author(s)
Kawabata, T., Nadamoto, Y., Shoda, D., Izumi, A., Shimamoto, C., Inoue, K., Uchida, K., Mohri, Y., and Ariyoshi, M.
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Journal Title
Proceedings of 19th International Offshore and Polar Engineering Conference
Peer Reviewed
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