Effect of corrosion on soil-structure interfacial shearing property and bearing capacity of steel foundation in submarine soil environment

Wang, Yuan; Wang, Wei; Huang, Jingqi; Luo, Lunbo

doi:10.1016/j.compgeo.2023.105269

Cited by 7 publications

(3 citation statements)

References 53 publications

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“…In general, steel corrosion can have significant negative impacts, including reduced profile thickness and deterioration (i.e., degradation) of the steel mechanical properties. This results in changes in the roughness characteristic of the steel surface [5] and decreases axial and flexural stiffnesses, which is reflected in reduced effective structural capacity [6,7]. It has been observed that the aggressiveness of corrosion in soils is impacted by various chemical and physical properties (e.g., soil pH, moisture content, soil resistivity, temperature, dissolved oxygen, and microbial activity) which affect the long-term workability of buried steel structures [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Performance of Buried Corrugated Galvanized Steel under Accelerated Wetting/Drying Cyclic Corrosion Test

Ezzeldin,

El Naggar,

Newhook

2024

Buildings

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Rehabilitation of corroded buried galvanized steel structures, including corrugated metal culverts (CMCs) and pipes (CMPs), requires a deep understanding of the corrosion process and the corresponding deterioration. The current paper describes an accelerated laboratory corrosion test of corrugated galvanized steel coupons exposed to sequenced wetting/drying cycles ranging from 50 and up to 1600 cycles. The analysis demonstrates the influence of applying an increased number of wetting/drying cycles on the acceleration of the developed corrosion in the buried galvanized steel coupons. The study examines changes in the steel geometry represented by thickness loss and the accompanied deterioration of the mechanical properties such as tensile strength, hardness, and ductility over relatively short periods of time. It was observed that corrosion was insignificant as long as the zinc coating of the galvanized steel lasted. However, when the zinc was almost fully depleted, the bare steel was directly subjected to the surrounding corrosive environment, causing greater corrosion damage during subsequent wetting/drying cycles. Based on four standard mathematical models, the paper also presents approximate average corrosion predictions for bare steel in the galvanized coupons, to assess the impact of potential damage due to corrosion and determine essential rehabilitation measures.

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Section: Introductionmentioning

confidence: 99%

Corrosion Performance of Buried Corrugated Galvanized Steel under Accelerated Wetting/Drying Cyclic Corrosion Test

Ezzeldin,

El Naggar,

Newhook

2024

Buildings

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“…The solution takes into account the interplay between the secondary ground wave effects transmitted via pile-soil vibration and the hydrodynamic pressure arising from the pile-water interaction. The literature [5] first employs electrolytic corrosion experiments to produce steel samples with varying degrees of corrosion. Subsequently, it examines the impact of corrosion on soil-steel interfacial shearing properties through interfacial shearing tests and discrete element simulations.…”

Section: Introductionmentioning

confidence: 99%

Research on the Postural Stability of Underwater Bottom Platforms with Different Burial Depths

Wei,

Li,

et al. 2024

Sensors

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The bottom platform is an important underwater sensor that can be used in communications, early warning, monitoring, and other fields. It may be affected by earthquakes, winds, waves, and other loads in the working environment, causing changes in posture and affecting its sensing function. Therefore, it is of practical engineering significance to analyze the force conditions and posture changes in the bottom platform. In order to solve the problem of postural stability of the underwater bottom platform, this paper establishes a fluid and structural simulation model of the underwater bottom platform. First, computational fluid dynamics (CFD) technology is used to solve the velocity distribution and forces in the watershed around the bottom platform under a 3 kn ocean current, where the finite element method (FEM) numerical calculation method is used to solve the initial equilibrium state of the bottom platform after it is buried. On this basis, this paper calculates the forces on the bottom platform and the posture of the bottom platform at different burial depths under the action of ocean currents. Additionally, the effects of different burial depths on the maximum displacement, deflection angle, and postural stability of the bottom platform are studied. The calculation results show that when the burial depth is greater than 0.6 m, and the deflection angle of the bottom platform under the action of the 3 kn sea current is less than 5°, the bottom platform can maintain a stable posture. This paper could be used to characterize the postural stability of underwater bottom platforms at different burial depths for the application of underwater sensors in ocean engineering.

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“…It may be complicated to incorporate corrosion effects into evaluations, but it is necessary for accurate results. Wang et al (2023) [7] Experiments were carried out by utilizing accelerated corrosion techniques and conducting tests that generated shearing forces between surfaces. The aim of the investigations was to explain how corrosion affects the strength of the connection between steel foundations and the soil in their vicinity.…”

Section: Introductionmentioning

confidence: 99%

Performance of Isolated Footing with Several Corrosion Levels under Axial Loading

2023

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This research aims to illustrate the corrosion process and its effect on the deterioration of reinforced concrete (RC) isolated footings using a small-scale model (1/8) and present the results of a prototype-scale study using a numerical model with different concrete depths and corrosion levels under axial load. The experimental program consisted of testing five small-scale (1/8) model RC isolated footings under axial loading after subjecting them to accelerated corrosion tests with a constant current. The main variable in the small-scale sample test was the corrosion level. This study presents an experimental approach, using the constant current method and the finite element method (FEM) with the ABAQUS package, to examine its effect on the axial load behavior under different corrosion ratios, which were 0%, 4.21%, 9.11%, 24.56%, and 30.67%. On the prototype scale, the variables were the corrosion level and the RC depths of 300 mm, 400 mm, and 500 mm. The results indicated that the average deviation in ultimate load between the experimental and FEM outcomes for the small-scale was below 5.6%, while the average deflection deviation was 6.8%. Also, the study found that an increase in the depth of the RC footing and corrosion ratio led to a more pronounced impact of the cracking pattern in the concrete and corroded bars, as well as a greater difference in the failure load. The experimental results suggest that the proposed numerical model is accurate and effective. These findings have important implications for the evaluation of isolated footings affected by corrosion damage using FEM, and can help inform decisions related to their design and maintenance. The failure loads of non-corroded footings with different depths were compared with the ECP-203 provisions of the 2018 Egyptian Code, and how corrosion ratios can be simulated by numerical models. The percentage variation between the design loads by code and the numerical loads by ABAQUS for controlled footings with thicknesses of 300, 400, and 500 mm was found to be 73%, 80%, and 78%, respectively. Using the derived relationship, the equivalent corrosion ratio percentages were 23.8%, 20.2%, and 32%, respectively. Doi: 10.28991/CEJ-2023-09-06-011 Full Text: PDF

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Effect of corrosion on soil-structure interfacial shearing property and bearing capacity of steel foundation in submarine soil environment

Cited by 7 publications

References 53 publications

Corrosion Performance of Buried Corrugated Galvanized Steel under Accelerated Wetting/Drying Cyclic Corrosion Test

Corrosion Performance of Buried Corrugated Galvanized Steel under Accelerated Wetting/Drying Cyclic Corrosion Test

Research on the Postural Stability of Underwater Bottom Platforms with Different Burial Depths

Performance of Isolated Footing with Several Corrosion Levels under Axial Loading

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