A fundamental study on structural strength assessment of U-bolts for expanded application to shipbuilding and offshore piping systems
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
The currently defined Safe Working Load (SWL) of the U-bolt has been determined excessively conservatively. To address this issue, this study conducted structural tests and numerical analysis on round type U-bolts of various sizes. The structural tests were conducted using a 2.5 MN actuator at the SURF R&D center, and the strain was measured through a uniaxial strain gage. The test showed the failure load greatly exceeded the design load with horizontal force. This necessitates a reevaluation and redefinition of load standards. Nonlinear numerical analysis was carried out, and these results were compared with the structural test results. When subjected to vertical loading, behavior was similar to uniaxial tension. On the other hand, using linear elastic analysis for determining SWL for horizontal loading was found to be irrational. A methodology was proposed for estimating the SWL of the U-bolt.
Abstract
The currently defined Safe Working Load (SWL) of the U-bolt has been determined excessively conservatively. To address this issue, this study conducted structural tests and numerical analysis on round type U-bolts of various sizes. The structural tests were conducted using a 2.5 MN actuator at the SURF R&D center, and the strain was measured through a uniaxial strain gage. The test showed the failure load greatly exceeded the design load with horizontal force. This necessitates a reevaluation and redefinition of load standards. Nonlinear numerical analysis was carried out, and these results were compared with the structural test results. When subjected to vertical loading, behavior was similar to uniaxial tension. On the other hand, using linear elastic analysis for determining SWL for horizontal loading was found to be irrational. A methodology was proposed for estimating the SWL of the U-bolt.
참고문헌 (12)
- Specification for Structural Steel Buildings – Allowable Stress Design and Plastic Design, "American Institute of Steel Construction", AISC, ~ (1989)
- American Society for Testing, "Standard Test Methods for Tension Testing of Metallic Materials", ASTM, ~ (2013)
- Anyfantis, K. N., "Ultimate strength of stiffened panels subjected to non-uniform thrust", Int. J. Nav. Archit. Ocean Eng, (12), pp.325~342 (2020)
- Bae, K. Y., "A study on the application of composites to pipe support clamps for the light-weight LNGC", Korean Soc. Compos. Mater, 34(1), pp.8~15 (2021)
- Duan, C., "Prediction of fully plastic J-integral for weld centerline surface crack considering strength mismatch based on 3D finite element analyses and artificial neural network", Int. J. Nav. Archit. Ocean Eng, (12), pp.354~366 (2020)
- "ISO 24200, Petroleum, Petrochemical and Natural Gas Industries – Bulk Material for Offshore Project – Pipe Support", ISO, ~ (2022)
- Kim, S. I., "Stress analysis for U-bolt structure by pipe supporting condition", J. Soc. Naval Arch. Korea, 40(2), pp.63~68 (2003)
- Liu, Z., "Determination of U-Bolt connection load capacities in overhead sign support structures", J. Constr. Steel Res, 170, pp.106096~ (2020)
- Ma, K. Y., "A study on collision strength assessment of a jack-up rig with attendant vessel", Int. J. Nav. Archit. Ocean Eng, 12, pp.241~257 (2020)
- Dayton Parts, "U-Bolts - Suspension Specialists", Dayton Parts, ~ (2001)
- Reihanian, M., "Fatigue failure analysis of holding U-bolts of a cooling fan blade", J. Eng. Failure Ana, 18, pp.2019~2027 (2011)
- Silva-Campillo, A., "Effect of local cutout on fatigue strength assessment in ship structures", Int. J. Nav. Archit. Ocean Eng, 15, pp.100508~ (2023)