Combined compression-bending performance and design of CFST with localised pitting corrosion

Li，Gen1; Hou，Chao2,3; Shen，Luming1

2022-05-01

10.1016/j.jcsr.2022.107247

JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH   影响因子和分区

0143-974X

1873-5983

This paper presents a comprehensive numerical study on the combined compression-bending performance of concrete-filled steel tubes (CFSTs) considering the commonly seen localised pitting corrosion damage in the marine environment. An advanced finite element modelling technique is utilised to simulate the localised corrosion pits on the outer surface of the steel tube considering its random nature. The differences between the load-moment interaction of CFSTs with uncorroded conditions, uniform corrosion simplification and pitting corrosion are discussed. The analytical results reveal the impact of localised pitting corrosion damage on the combined compression-bending performance of CFSTs can be grouped as the stress concentration around corrosion pits, premature local buckling of steel tubes and the reduction in effective confinement. An extended parametric study illustrates that the confinement factor and the mean pit depth have a considerable impact on the combined compression-bending behaviour of CFSTs with localised pitting corrosion. The feasibility of utilising existing design approaches calculates the load-moment interaction diagrams of locally pitted CFSTs following the DoV-based uniform corrosion simplification is evaluated. On this basis, simplified design methods accounting for the characteristic of pitting corrosion are proposed for estimating the post-corrosion load-bearing capacity of CFSTs under combined compression and bending, and reasonable accuracy is achieved.

Concrete-filled steel tubes Confinement effects Load-moment interaction Localised pitting corrosion Post-corrosion strength calculation

EI ; SCI

英语

通讯

Shenzhen Graduate School, Peking University[20200925154412003];

Construction & Building Technology ; Engineering

Construction & Building Technology ; Engineering, Civil

WOS:000877085200001

ELSEVIER SCI LTD

20221411879813

Bending (forming) ; Concretes ; Design ; Pitting ; Seawater corrosion ; Steel corrosion ; Tubes (components)

Structural Members and Shapes:408.2 ; Concrete:412 ; Seawater, Tides and Waves:471.4 ; Metal Forming:535.2 ; Metals Corrosion:539.1 ; Steel:545.3 ; Pipe, Piping and Pipelines:619.1

ENGINEERING

2-s2.0-85127339066

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.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Guangzhou,511485,China

Li，Gen,Hou，Chao,Shen，Luming. Combined compression-bending performance and design of CFST with localised pitting corrosion[J]. JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH,2022,192.

Li，Gen,Hou，Chao,&Shen，Luming.(2022).Combined compression-bending performance and design of CFST with localised pitting corrosion.JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH,192.

Li，Gen,et al."Combined compression-bending performance and design of CFST with localised pitting corrosion".JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 192(2022).