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

Volume

1

fYear

2004

fDate

9-12 Nov. 2004

Firstpage

193

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;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS '04. MTTS/IEEE TECHNO-OCEAN '04

Print_ISBN

0-7803-8669-8

Type

conf

DOI

10.1109/OCEANS.2004.1402916

Filename

1402916