Reinforced Concrete Bridge Deck Model Considering Delayed Exposure to Chlorides

Konečný, Petr; Lehner, Petr; Pustka, David

doi:10.3311/ppci.13780

Cited by 4 publications

(4 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The author of [ 7 ] examines such critical parameters as the volume of the protected area, the size effect of the exposed area of the specimen and differential aeration circumstances, which also have a great influence on the level of corrosion damage. Paper [ 8 ] considers the effect of delayed chloride exposure on the chloride-induced corrosion initiation. Additionally, such parameters as the concrete type, the effect of aging and their impact on the diffusion coefficient are analyzed.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Corrosion Fatigue Damages of Rebars under Loading in Time

2021

View full text Add to dashboard Cite

Nowadays, a relatively small number of studies concern the study of corrosion processes in reinforced concrete structures under load. Additionally, rather little research has been carried out concerning changes in the stress–strain state parameters of structures under the simultaneous action of aggressive environment and load. This issue requires additional experimental and theoretical investigation. Determination of mechanical properties, fatigue characteristics and susceptibility to corrosion cracking was performed on samples of reinforcing St3GPF steel. The chemical composition of steel was determined by structural analysis. The spectral method for the determination of alloying elements and impurities in steels is based on the excitation of iron atoms and admixtures by electric discharge, decomposition of radiation into a spectrum, followed by its registration on photoplate with the use of electrograph. Experimental tests of samples in an aggressive environment under the action of statically applied tensile force showed that corrosion damage has little effect on the strength characteristics. At the same time, the decrease in area reduction and the decrease in strain were recorded. Additionally, the action of cyclic loads in an aggressive environment leads to a significant reduction in the fatigue limit to values from 20 to 24% of the yield strength of the original samples, which is 2–3 times lower than the fatigue limit of undamaged samples.

show abstract

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Corrosion Fatigue Damages of Rebars under Loading in Time

2021

View full text Add to dashboard Cite

show abstract

“…The clear majority of studies deals with durability and reliability of vibrated concrete [21][22][23][24][25][26][27][28][29][30][31][32], and significantly less on the durability of spun concrete [33][34][35][36][37] because the latter is much more expensive, time consuming and complex.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Long-Term Physical Salt Attack and Multicycle Temperature Gradient on the Mechanical Properties of Spun Concrete

2021

View full text Add to dashboard Cite

The article is focused on spun concrete made with different chemical admixtures under long-term exposure to aggressive salt-saturated ground water and a cyclic temperature gradient. Over a long-term experimental investigation, 64 prismatic spun concrete specimens were subjected to multicycle (75–120) processing under combined aggressive ambient conditions. Prismatic specimens were soaked in water or saline and dried at a temperature of 45–50 °C. The long-term multi-cycle effect of the temperature gradient and physical salt attack on the compressive strength, Young’s modulus and durability of concrete was found to be negative. Chemical admixtures, though, improved the structure of spun concrete, thus having a significant positive effect on its physical-mechanical properties and durability.

show abstract

“…The original algorithm contains a three-node element that has certain limitations that could cause inaccuracies of a specific input parameter configuration [7]. Also, the possibilities of different protection of the reinforcement or salting-down have been introduced already [8,9]. The finite element model (FEM) is based on the newly derived four-node isoparametric diffusion element that has not been published yet in this form, up to author knowledge.…”

Section: Introductionmentioning

confidence: 99%

Numerical model of time-dependent diffusion of chlorides in the concrete based on 2D four-node isoparametric element

Lehner

Konečný

2020

MATEC Web Conf.

Self Cite

View full text Add to dashboard Cite

The enhancement of 2D model for the diffusion of chloride ions into reinforced concrete considering the time-dependent diffusion coefficient is discussed in the article. The non-stationary Finite Element Model is based on the four-node isoparametric element. The algorithm is implemented in MatLab compatible environment and an important part of source code is presented. The results of Finite Element Analysis are compared with the results of 2D analytical diffusion model.

show abstract

Reinforced Concrete Bridge Deck Model Considering Delayed Exposure to Chlorides

Cited by 4 publications

References 19 publications

Corrosion Fatigue Damages of Rebars under Loading in Time

Corrosion Fatigue Damages of Rebars under Loading in Time

The Impact of Long-Term Physical Salt Attack and Multicycle Temperature Gradient on the Mechanical Properties of Spun Concrete

Numerical model of time-dependent diffusion of chlorides in the concrete based on 2D four-node isoparametric element

Contact Info

Product

Resources

About