Performance and strength calculation of CFST columns with localized pitting corrosion damage

Li，Gen1; Hou，Chao2; Shen，Luming1; Yao，Guo Huang3

2022

10.1016/j.jcsr.2021.107011

JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH   影响因子和分区

0143-974X

1873-5983

In recent years, concrete-filled steel tubular (CFST) columns are increasingly used in ocean construction, such as offshore towers and marine platforms. When used in harsh marine environments, the inevitable pitting corrosion poses a crucial threat to the outer surface of CFST and results in stress concentration, early local buckling as well as confinement reduction towards concrete. Relevant study is rarely seen given the complexity in experimental realization and numerical modelling of random pitting corrosion. This study aims to investigate the nonlinear performance of CFST columns with localized pitting corrosion damage. Advanced finite element modelling techniques are developed to simulate the localized corrosion pits with the consideration of its random nature in terms of sizes, depths and distributions. Previous test data are adopted to verify the developed model. The differences between the structural performance of CFST columns under pitting corrosion, uniform corrosion and uncorroded conditions are revealed. Comparison results demonstrate a more severe degradation caused by localized pitting corrosion. Finally, taking the characteristic of pitting corrosion into account, simplified design methods are proposed by modifying the existing methods in the current standards for calculating the post-corrosion strength of CFST columns.

Concrete filled steel tube (CFST) Full-range behaviour Localized pitting corrosion Random pitting modelling Simplified calculation method

SCI ; EI

英语

通讯

Shenzhen Science and Technology Innovation Commission[20200925154412003]

Construction & Building Technology ; Engineering

Construction & Building Technology ; Engineering, Civil

WOS:000715192000001

ELSEVIER SCI LTD

20214511109028

Offshore oil well production ; Offshore structures ; Seawater corrosion ; Steel corrosion ; Tubular steel structures

Structural Members and Shapes:408.2 ; Seawater, Tides and Waves:471.4 ; Oil Field Production Operations:511.1 ; Metals Corrosion:539.1 ; Steel:545.3 ; Marine Drilling Rigs and Platforms:674.2

ENGINEERING

2-s2.0-85118329238

Scopus

1.School of Civil Engineering,The University of Sydney,Sydney,2006,Australia
2.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.School of Traffic and Environment,Shenzhen Institute of Information Technology,Shenzhen,518172,China

Li，Gen,Hou，Chao,Shen，Luming,et al. Performance and strength calculation of CFST columns with localized pitting corrosion damage[J]. JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH,2022,188.

Li，Gen,Hou，Chao,Shen，Luming,&Yao，Guo Huang.(2022).Performance and strength calculation of CFST columns with localized pitting corrosion damage.JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH,188.

Li，Gen,et al."Performance and strength calculation of CFST columns with localized pitting corrosion damage".JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 188(2022).