Time-variant Reliability of Ultimate Strength of Floating Structures under Fatigue and Corrosion Deterioration

被引：0

作者：

Wang, Xizhao ^{[1
,2
]}

Gu, Xuekang ^{[1
,2
]}

Ding, Jun ^{[1
,2
]}

Wang, Qibin ^{[1
,2
]}

Gao, Jiantao ^{[3
]}

Wu, Jianguo ^{[3
]}

机构：

[1] China Ship Scientific Research Center, Wuxi,214082, China

[2] Taihu Laboratory of Deep-sea Technology and Science, Wuxi,214082, China

[3] College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou,310023, China

来源：

Ship Building of China | 2023年 / 64卷 / 06期

关键词：

Bending strength - Corrosion - Corrosion fatigue - Random processes - Reliability - Structural dynamics;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A series of complex-type floating structures with characteristics of long-term serviceability and large scale have derived from the research of very large floating structures (VLFS). In order to evaluate the bending and torsional ultimate strength reliability of complex-type floating structures, fatigue crack, and corrosion are selected as the main factors influencing ultimate strength degradation. Time-variant bending and torsional ultimate strength are calculated based on the simplified progressive collapse analysis. Long-term extreme wave-induced loads and their time-variant characteristics are analyzed. Finally, the time-variant reliability calculation method considering strength degradation and loads random process is established based on the out-crossing model. Results show that severe corrosion deterioration and fatigue make time-variant ultimate strength reliability decrease with time growth. The time-variant ultimate strength reliability decreasing curve matches well with that of the exponential distribution model. © 2023 Editorial office of Ship Building of China. All rights reserved.

引用

页码：49 / 59