Effect of corrosion on the buckling capacity of tubular members

[摘要] Offshore installations are subjected to harsh marine environment and often have damages from corrosion. Several experimental and numerical studies were performed in the past to estimate buckling capacity of corroded tubular members. However, these studies were either based on limited experimental tests or numerical analyses of few cases resulting in semi-empirical relations. Also, there are no guidelines and recommendations in the currently available design standards. To fulfil this research gap, a new formula is proposed to estimate the residual strength of tubular members considering corrosion and initial geometrical imperfections. The proposed formula is verified with results from finite element analyses performed on several members and for varying corrosion patch parameters. The members are selected to represent the most relevant Eurocode buckling curve for tubular members. It is concluded that corrosion reduces the buckling capacity significantly and the proposed formula can be easily applied by practicing engineers without performing detailed numerical analyses.

[发布机构] Department of Mechanical and Structural Engineering and Materials Science, University of Stavanger, Norway^1

[学科分类] 计算机科学（综合）

[关键词] Experimental and numerical studies;Experimental test;Initial geometrical imperfections;Marine environment;Offshore installations;Practicing engineers;Residual strength;Semiempirical relations