Structural performance deterioration of corroding reinforced concrete columns in marine environments

Chen, Hua-Peng; Jiang, Yu; Markou, George

doi:10.1016/j.oceaneng.2022.112155

Cited by 16 publications

(4 citation statements)

References 38 publications

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“…The final measurement is shown in Figure 5, where the crack width is the maximum crack width of the specimen at a certain load level. Referring to the code "Code for Design of Concrete Structures" [27] (GB 50010-2010) 0.2 mm was taken as the crack width threshold (dashed line in the figure). From Figure 5A-D, it can be seen that the maximum crack width of each specimen increases linearly with the increase in load, and the crack width is less than 0.1 mm when cracking, and the load is 50~100 kN when reaching the threshold value of crack width (0.2 mm) in a normal use limit state.…”

Section: Width Of Crackmentioning

confidence: 99%

“…Most of the studies on the mechanical performance of members in a marine environment have been conducted by artificially simulating dry and wet cycles and seawater scouring, which still have some differences from the real marine environment. In the existing studies on the mechanical properties of reinforced concrete beams in real marine environments [27,28], there is a lack of relevant research information on the time-varying mechanical properties of reinforced marine sand concrete beams in tidal environments, which need to be investigated through experiments. Therefore, in this study, eight reinforced marine sand concrete beams were designed and fabricated.…”

Section: Introductionmentioning

confidence: 99%

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Flexural Performance of Steel Bar Reinforced Sea Sand Concrete Beams Exposed to Tidal Environment

et al. 2022

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The advancement of marine engineering has brought close attention to the durability of concrete structures. In order to investigate the time-varying performance of reinforced concrete beams in a marine environment and to better apply sea sand directly in marine engineering, this paper describes tests and analysis on the flexural performance of reinforced sea sand concrete beams after being exposed to a tidal environment. Eight beams were tested using four-point static loading equipment. The variation parameters included the type of mixing water, longitudinal reinforcement rate, sea sand replacement rate and duration of service. The force damage process and damage pattern were observed. The load–maximum width crack curve and load–deflection curve were obtained. The effects of each variation parameter on the mechanical properties such as ultimate bearing capacity, initial rigidity, energy dissipation coefficient and ductility coefficient were analyzed. The test results show that compared with the specimens exposed to the tidal environment for 90 days, the peak load of the specimens decreased by 5.6%, the initial rigidity decreased by 60.9% and the ductility coefficient decreased by 41% after 270 days of exposure, while the peak deflection and energy dissipation indexes first increased and then decreased. The seawater mixing can enhance the peak load and cracking load of the specimens, but the initial rigidity, peak deflection, energy dissipation coefficient and ductility coefficient of the specimens are reduced to some extent. The initial rigidity of the specimens tended to increase with the increase in the sea sand replacement, but the peak load decreased. Under the same reinforcement rate, reducing the diameter of the reinforcement is beneficial to improve the initial rigidity of the specimen, while using the reinforcement with higher elongation can effectively enhance the peak deflection of the specimen. Based on the Chinese code, the calculation method of flexural bearing capacity with modified concrete strength is proposed, and the calculation results are in good agreement with the test results.

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Section: Width Of Crackmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexural Performance of Steel Bar Reinforced Sea Sand Concrete Beams Exposed to Tidal Environment

et al. 2022

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“…Chen et al [11] examined the structural performance deterioration of corroding reinforced concrete columns in marine environments. The authors focused on the effects of corrosion on the load-carrying capacity, stiffness, and ductility of the columns.…”

Section: Introductionmentioning

confidence: 99%

“…The study revealed that corrosion significantly reduced the strength and ductility of the columns, leading to a higher risk of structural failure. The findings emphasized the importance of corrosion protection measures and regular maintenance to ensure the safety and durability of reinforced concrete structures in marine environments [11]. The structural performance of deteriorating reinforced concrete structures was investigated by Pasha and Joshi [12].…”

Section: Introductionmentioning

confidence: 99%

Developing a Fuzzy Expert System for Diagnosing Chemical Deterioration in Reinforced Concrete Structures

Farahani,

Naderpour,

Konstantakatos

et al. 2023

Applied Sciences

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The widespread application of reinforced concrete structures in different environmental conditions has underscored the need for effective maintenance and repair strategies. These structures offer numerous advantages, but are not impervious to the deleterious effects of chemical deterioration. The outcomes of this research hold significant implications for the management system of reinforced concrete structures. This study proposes the utilization of a fuzzy expert system as a means of enhancing the diagnosis of chemical deterioration in reinforced concrete structures that is a valuable tool for engineers and decision-makers involved in the maintenance and repair of these structures. The fuzzy expert system serves as an intelligent tool that can incorporate various symptoms of deterioration and inspection data to improve the accuracy and reliability of the diagnostic process. By integrating these inputs, the system evaluates 21 different data points, each representing a specific aspect of deterioration, on a scale ranging from 0 to 100. This numerical representation allows for a quantification of the level of deterioration, with 0 denoting minimal deterioration and 100 indicating severe deterioration. The effectiveness of the fuzzy expert system lies in its ability to process the vast amount of data and apply fuzzy operations on 352 fuzzy rules. These rules define the relationships between the inspection data, the type of deterioration, and its extent. Through this computational process, the fuzzy expert system can provide valuable insights into 10 distinct types of chemical deterioration, facilitating a more precise and comprehensive diagnosis. The implementation of the fuzzy expert system has the potential to revolutionize the field of diagnosing chemical deterioration in reinforced concrete structures. By addressing the limitations of traditional methods, this advanced approach can significantly improve the clarity and accuracy of the diagnostic process. The ability to obtain more precise information regarding the type and extent of deterioration is vital for developing effective maintenance and repair strategies. Ultimately, the fuzzy expert system holds great promise in enhancing the overall durability and performance of reinforced concrete structures in various environments.

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Performance evaluation of marine circular reinforced concrete columns subjected to combined corrosion and compressive load

Jiang,

Chen,

2024

Applied Ocean Research

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Structural performance deterioration of corroding reinforced concrete columns in marine environments

Cited by 16 publications

References 38 publications

Flexural Performance of Steel Bar Reinforced Sea Sand Concrete Beams Exposed to Tidal Environment

Flexural Performance of Steel Bar Reinforced Sea Sand Concrete Beams Exposed to Tidal Environment

Developing a Fuzzy Expert System for Diagnosing Chemical Deterioration in Reinforced Concrete Structures

Performance evaluation of marine circular reinforced concrete columns subjected to combined corrosion and compressive load

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