Development of pipe-in-pipe filled with frozen material for practical use

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420473
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Hokkaido University
• Principal Investigator: Kanie Shunji 北海道大学, 工学(系)研究科(研究院), 教授 (10332470)
• Co-Investigator(Kenkyū-buntansha): SATO Motohiro 北海道大学, 大学院工学研究院, 准教授 (00344482)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 構造工学 / パイプインパイプ / 人工凍結 / 中詰材料 / 高靱性

Outline of Final Research Achievements

Pipe-in-pipe filled with frozen material can bend smoothly to a large curvature without failure. The authors improved a bending apparatus for experiment to make it follow the bending behavior from elastic to plastic ranges consistently. The measuring method was also improved to observe the large bending curvature by a digital image processing with a high resolution camera. As a result, it was confirmed that the performance of pipe-in-pipe filled with frozen material was drastically improved. The authors proposed numerical models which can evaluate the bending behavior of the pipe-in-pipes, and it becomes possible to explain the effect of filling material on the increase in ductility. The authors are convinced of that the application of pipe-in-pipe to a practical use was enhanced.

Free Research Field

構造工学、寒地環境工学