Structural health monitoring for corrosion induced thickness loss in marine plates subjected to random loads

Katsoudas, Anastasios S.; Silionis, Nicholas E.; Anyfantis, Konstantinos N.

doi:10.1016/j.oceaneng.2023.114037

Cited by 12 publications

(8 citation statements)

References 10 publications

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“…Through the physical model test of the upper part of the FB topside structure, strain data of the T and K points of the FB topside structure under the different standard values of mooring force and mooring angle were obtained, and they were substituted into the dynamic inversion model in Equations ( 19)- (22) to predict the values for mooring force and mooring angle. The rationality and reliability of the dynamic inversion model of FB mooring force were verified by comparing the predictions of the model with standard mooring force and mooring angle values.…”

Section: Resultsmentioning

confidence: 99%

“…A test was conducted on a physical model of the FB topside structure under the mooring force, and strain data at two points (T and K) of the FB topside structure under the different mooring forces and mooring angles were obtained and substituted into Equations ( 19)- (22) to obtain the values of the mooring force and mooring angle predicted by the model. The accuracy of the dynamic inversion model of the mooring force of the FB was verified by comparing the values of mooring force and mooring angle predicted by the model with the standard values for experimental loading.…”

Section: Model Validation By Tests Of a Structural Physical Modelmentioning

confidence: 99%

“…As a significant component of a sea lock, the normal service of an FB is key to ensuring the safe operation and efficient navigation of a lock. However, large ships, excessive speeds of entry, irregular mooring, and other factors, including corrosion caused by chloride salts from the environment as a result of seawater intrusion, aggravate the damaging and destruction of metal structures and seriously threaten the service safety of FBs [20][21][22][23][24][25]. In addition, damage to the main structure of an FB induces deformation of the guide trough and blockage of the pulley, which leads to accidents such as pulling the ship into the water, damaging the hull, and causing casualties, resulting in very large economic losses and negative impacts on society.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Inversion Model of the Mooring Force on a Floating Bollard of a Sea Lock

Xiang

Shu³

et al. 2023

JMSE

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Sea locks that connect inland canals and rivers to the open sea are crucial links that ensure the efficient navigation of ships. Floating bollards (FBs) are significant components of sea locks, and they are affected by factors such as large ships, speed of entry, and irregular mooring lines coupled with corrosion by chloride salts from seawater intrusion from the environment. These factors aggravate damage to metal structures, which seriously threatens the safety of FBs. Overloading of FBs by mooring forces caused by the illegal use of FBs for the braking of large ships that enter locks at excessive speed is the main cause of structural damage and overload failure for FBs. Controlling the dynamic mooring force acting on the FB is an important prerequisite to ensure the safe passage of a ship through a lock. It is impossible to perform real-time monitoring of the magnitude and direction of the mooring force on an FB by installing load-measuring equipment on the mooring line. Therefore, in this study, the structure of an FB in a sea lock project was taken as an example, and the mathematical relationships between the strain in the load-sensitive area of the FB and the mooring force and the mooring angle were quantified. A dynamic inversion model of the ship mooring force on an FB was proposed. This model used real-time feedback from the strain signal in the load-sensitive region of the FB structure to obtain information about the mooring force. The accuracy of the model was verified by conducting tests with a physical model of the topside structure of the FB and comparing the predicted results with the test data. The research results can lay a theoretical foundation for real-time monitoring of the structural response of an FB under the action of mooring forces and promote the development of intelligent methods for the operation and maintenance of a sea lock, which have important scientific significance and engineering value.

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Section: Resultsmentioning

confidence: 99%

Section: Model Validation By Tests Of a Structural Physical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamic Inversion Model of the Mooring Force on a Floating Bollard of a Sea Lock

Xiang

Shu³

et al. 2023

JMSE

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“…Most structural systems currently in operation are exposed to some degree of corrosion deterioration; this is especially true for marine structures, which is the primary field of the authors. Despite recent interest in deploying SHM systems for CITL monitoring [17,[41][42][43], the naturally slow evolution of the phenomenon has constrained investigations to a numerical setting. In response to this, a novel testing procedure has been employed to achieve substantial CITL in a laboratory setting in a significantly accelerated timeframe, that is presented here for the first time.…”

Section: Accelerated Corrosion Under Three-point Bending Experimentsmentioning

confidence: 99%

On the Detection of Thickness Loss in Ship Hull Structures Through Strain Sensing

Silionis¹,

Anyfantis²

2022

Lecture Notes in Civil Engineering

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Fatigue crack growth is one of the most common types of deterioration in metal structures with significant implications on their reliability. Recent advances in Structural Health Monitoring (SHM) have motivated the use of structural response data to predict future crack growth under uncertainty, in order to enable a transition towards predictive maintenance. Accurately representing different sources of uncertainty in stochastic crack growth (SCG) processes is a non-trivial task. The present work builds on previous research on physics-based SCG modeling under both material and loadrelated uncertainty. The aim here is to construct computationally efficient, probabilistic surrogate models for SCG processes that successfully encode these different sources of uncertainty. An approach inspired by latent variable modeling is employed that utilizes Gaussian Process (GP) regression models to enable the surrogates to be used to generate prior distributions for different Bayesian SHM tasks as the application of interest. Implementation is carried out in a numerical setting and model performance is assessed for two fundamental crack SHM problems; namely crack length monitoring (damage quantification) and crack growth monitoring (damage prognosis).

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“…Corrosion damage in ocean environments has received significant attention for steel or steel-concrete structures, such as pile foundations and jacket platforms [1,2]. As a typical high-performance structure, concrete-filled double-skin steel tubular (CFDST) structures increasingly demonstrate a promising application in ocean engineering for bearing complex loads [3][4][5][6]. Nevertheless, the traditional CFDST structure typically comprises double-skin carbon steel tubes and sandwich concrete, referred to as the concrete-filled double-skin carbon steel tubular (CFDSCST) section, which is prone to corrosion [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Compressive Behavior of Stainless Steel–Concrete–Carbon Steel Double-Skin Tubular (SCCDST) Members Subjected to External Hydraulic Pressure

Wang,

Yang,

Sun

2024

JMSE

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The new-type stainless steel–concrete–carbon steel double-skin tubular (SCCDST) members, characterized by their exceptional corrosion resistance and mechanical bearing capacity, have promising applications in ocean engineering, particularly in deep-water engineering. The external hydraulic pressure and interfacial action of various materials intensify the complexity of composite performance of SCCDST members. This paper describes an analytical investigation on the concentric compressive performance of SCCDST members under external hydraulic pressure. The full-range mechanism, including load–displacement response, bearing capacity contribution, and contact pressures, was investigated through the finite element (FE) model that was validated by the failure mode, bearing capacity, and response of axial load versus strain. Subsequently, influences of key geometric–physical parameters were analyzed, e.g., diameter-to-thickness ratios (Do/to, Di/ti), material strengths (fyo, fyi, and fc), hollow ratios (χ), and water depths (H). Typical results indicate that: the initial active confinement action derived from the hydraulic pressure can enhance the interfacial contact pressure and axial compression capacity of SCCDST members due to the tri-axial compression state; the enhancement of confinement effect is mainly from the interfacial interaction between outer stainless steel tube and concrete infill; influence of water depth on bearing capacity cannot be ignored, e.g., the bearing capacity of an SCCDST member with larger hollow ratio (χ = 0.849) is not enhanced under a higher hydraulic pressure (H = 900 m) because of the cross-sectional buckling failure risk. Finally, a modified method considering the effect of water depth was proposed and verified for SCCDST members under hydraulic pressure.

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Structural health monitoring for corrosion induced thickness loss in marine plates subjected to random loads

Cited by 12 publications

References 10 publications

Dynamic Inversion Model of the Mooring Force on a Floating Bollard of a Sea Lock

Dynamic Inversion Model of the Mooring Force on a Floating Bollard of a Sea Lock

On the Detection of Thickness Loss in Ship Hull Structures Through Strain Sensing

Compressive Behavior of Stainless Steel–Concrete–Carbon Steel Double-Skin Tubular (SCCDST) Members Subjected to External Hydraulic Pressure

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