Title :
A method for estimating strength and reliability of stiffened plates for pontoon-type VLFS
Author :
Okada, Hiroo ; Masaoka, Koji ; Tsubogo, Takashi ; Katsura, Shinji ; Kawamata, Shin-Ichi
Author_Institution :
Osaka Prefecture Univ., Japan
Abstract :
This paper deals with a simplified method for estimating strength and reliability of stiffened plates for pontoon-type very large floating structures (VLFS), which are supposed floating airport, as a part of studies on reliability based preliminary design systems. Firstly, limit state conditions are shortly presented for the buckling and ultimate collapse strength of stiffened plates under combined compression, shear and lateral pressure in the deck, bulkhead and bottom parts of VLFS, especially, by using a simplified estimation formula. Next, the validity is shown by nonlinear finite element method. Finally, the reliability level is investigated through numerical examples for a 5,000 m-class VLFS under a trial design.
Keywords :
construction components; finite element analysis; marine systems; oceanography; plates (structures); buckling; collapse strength; combined compression/shear/lateral pressure; deck; floating airport; nonlinear finite element method; pontoon-type VLFS; stiffened plates strength/reliability estimating; very large floating structures; Airports; Compressive stress; Finite element methods; Load modeling; State estimation;
Conference_Titel :
OCEANS '04. MTTS/IEEE TECHNO-OCEAN '04
Print_ISBN :
0-7803-8669-8
DOI :
10.1109/OCEANS.2004.1402916
