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Content available Modeling of cracking of the concrete cover taking into account the coupled diffusion/mechanical process
Yurkova Kseniya, Krykowski Tomasz
Computer Assisted Methods in Engineering and Science
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2023
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Vol. 30, no. 4
481--503
EN
This paper presents a mechanical-diffusion one-way coupled corrosion model that allows the analysis of both accelerated and natural reinforcement corrosion. The impact of corrosion products on the concrete cover is exerted using the tensor of the volumetric strain rate dependent on the rate of concentration change of corrosion products or the rate of concentration change of ferrous ions. The approach proposed in the paper enables the analysis of the impact of corrosion products with a complex composition that depends on the intensity and density of the electric current. The model also enables the analysis of cases where the distribution of corrosion products is inhomogeneous around the circumference of the rebar.
2
Content available remote Analysis of application of gradient concrete models to assess concrete cover degradation under reinforcement corrosion
Yurkova Kseniya, Krykowski Tomasz
Architecture Civil Engineering Environment
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2023
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Vol. 16, no. 4
109--123
EN
The paper presents a comparative analysis of the application of two nonlocal gradient-formulated models to evaluate the concrete cover degradation time. Calculations were made taking into account the increase in the volume of the steel ring around the perimeter of the reinforcement bar. The results of the calculations were compared with the results of experimental studies published in the literature and with the elastic-plastic model based on the Menetrey-Willam surface, in which the objectivity of the obtained results depends on the fracture energy. In addition, the paper compares solutions using different contact models and cohesion models.
3
Modelowanie powstawania produktów korozji zbrojenia i ich wpływu na uszkodzenie otuliny betonowej
Yurkova Kseniya, Krykowski Tomasz
Inżynieria i Budownictwo
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2022
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R. 78, nr 9-10
410--413
PL
W pracy porównano różne sposoby odwzorowania oddziaływania mechanicznego produktów korozji na beton otuliny oraz ich wpływu na ewolucję uszkodzeń w otulinie. Propagację uszkodzeń w betonie otuliny analizowano z uwzględnieniem sprężysto-plastycznego modelu betonu o powierzchni Menetreya-Willama ze wzmocnieniem i osłabieniem. Dodatkowo porównano różne modele kontaktu stali i betonu ujmujące zarówno sztywny, jak i podatny pozwalający na separacje styku model kontaktu oraz model kohezyjny.
EN
The paper compares various methods of mapping the mechanical impact of corrosion products on the concrete cover and their impact on the evolution of damage in the cover. The propagation of damage in the concrete cover was analyzed taking into account the elastic-plastic model of concrete described by Menetrey-Willam yielding surface with hardening and softening. In addition, different contact models of steel and concrete were compared, capturing both a rigid and flexible allowing for contact separation contact model and cohesion contact model.
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