Analytical Formula for Collapse Extent of VLFS under Extreme Vertical Bending Moment

A very large floating structure (VLFS) may undergo buckling and yielding under rare and extreme waves. Then, the cross section of the VLFS collapses completely. The evaluation of the consequence of collapse is critical in view of the risk analysis. In this paper, the parametric dependencies of the collapse extent of a VLFS under extreme vertical bending moments are investigated. A mathematical equation to describe the collapse behavior of the VLFS is developed taking account of the hydroelastic deformation. The whole VLFS is modeled by a segmented beam on an elastic foundation with infinite length connected via a nonlinear rotational spring assuming that a plastic hinge is formed at the collapsing section of the VLFS under the extreme vertical bending moment. By solving the equation in an analytical manner, a simple formula to predict the extent of collapse of the VLFS is developed. The results by the formula are well correlated with those by numerical simulation that has been developed by the present authors. It is shown that the characteristic length defined for a VLFS plays a key role in the collapse behavior.

• Record URL:
  • https://doi.org/10.1007/s00773-018-0555-1
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09484280
• Supplemental Notes:
  • Copyright © 2018, JASNAOE.
• Authors:
  • Iijima, Kazuhiro
  • Fujikubo, Masahiko
• Publication Date: 2019-6

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 372-381
• Serial:
  • Journal of Marine Science and Technology
  • Volume: 24
  • Issue Number: 2
  • Publisher: Springer Japan
  • ISSN: 0948-4280
  • EISSN: 1437-8213
  • Serial URL: http://link.springer.com/journal/773

Subject/Index Terms

• TRT Terms: Bending moments; Collapse; Elastoplasticity; Floating structures; Hydroelasticity
• Subject Areas: Maintenance and Preservation; Marine Transportation; Terminals and Facilities;

Filing Info

• Accession Number: 01711900
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 22 2019 10:32AM