Stress-strain state of damaged reinforced concrete bended elements at operational load level

Kopiika, Nadiia; Vegera, Pavlo; Vashkevych, Rostyslav; Blikharskyy, Zinoviy

doi:10.30657/pea.2021.27.32

Cited by 13 publications

(5 citation statements)

References 23 publications

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“…And to obtain full information about material durability also other parameters have been determined: characteristic tensile strength of concrete (7), design concrete tensile strength (8), design tensile strength of concrete (9), the modulus of elasticity of concrete -according formulas as follows.…”

Section: Methodsmentioning

confidence: 99%

“…Every construction, every building is exposed to various influences during its operation. As a result, various defects and damages to these elements occur, which affect their safe functioning [9,10]. Often, human errors during construction, repairs, modernization, or the execution of structural elements of buildings are also a cause of defects and damages [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Management of the Special Processes – An Experimental Study of Bent Reinforced Concrete Beams

Michałowska-Maziejuk,

Klimecka-Tatar,

Ingaldi

et al. 2024

Adv. Sci. Technol. Res. J.

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The article presents an analysis of the results obtained from the testing of simply supported reinforced concrete beams subjected to four-point bending. The beams, with two levels of steel reinforcement (ρ s1 = 1.26%, ρ s 2 = 0.71%), and dimensions of 0.12×0.30×3.30 m, were subjected to loading involving a sudden increase in force with multiple unloading cycles to zero. The study included comparative analysis of deflection results obtained from experimental tests (calculated based on the curvature of the element and readings from measurement devices) with deflection values obtained through calculations based on two selected standards. Real values of ultimate bending moments were also compared with theoretical values. Additionally, compressive strength tests were conducted on eight cubic concrete specimens with a side length of b = 150 mm, obtained for each concrete batch. They constitute accompanying studies. Using standard procedures, strength and statistical parameters were estimated and evaluated, taking into account the assessment of the quality of the concrete production used to make the reinforced concrete beams. Ensuring compliance with the process of producing full-sized reinforced concrete beams with existing standard procedures, as well as attention to the quality of concrete production, contributed to achieving satisfactory results in the experimental tests. Knowledge about the impact of loading on mechanical properties enables effective management of factors shaping quality to obtain a construction material with optimal parameters.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Management of the Special Processes – An Experimental Study of Bent Reinforced Concrete Beams

Michałowska-Maziejuk,

Klimecka-Tatar,

Ingaldi

et al. 2024

Adv. Sci. Technol. Res. J.

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“…Authors (Lobodanov et al, 2021) have analyzed data on the influence of damages in the concrete compressed area on reinforced concrete structures' bearing capacity. Experimental studies of reinforced concrete beams with damage to stretched reinforcement, which occur under the action of the initial load and without it, showed significant changes in the stress-strain state of the element (Kopiika et al, 2021). One or five holes are used for modeling local or distributed along the length damages of the reinforcement.…”

Section: Literature Reviewmentioning

confidence: 99%

Bearing capacity of reinforced concrete beams with and without damages of rebar

Khmil,

Blikharskyy,

Vegera

et al. 2023

Production Engineering Archives

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The article presents the results of the bearing capacity of reinforced concrete beams with and without damages of internal reinforcement. One of the main elements of the production of the reinforced concrete industry is beams. The analysis of the experimental tests showed that the bearing capacity of reinforced concrete beams with damaged tensile main reinforcement decreases according to control undamaged samples due to the reduction of the reinforcement cross-section. However, the bearing capacity of reinforced concrete beams with tensile main reinforcement Ø20А500C, damaged to the cross-section area equal the rebar Ø16mm is more on 3.7… 24.0% than the bearing capacity of reinforced concrete beams with undamaged Ø16mm rebar. This is due to the non-uniform material properties of used thermally strengthened reinforcement A500C. When during testing the tensile main reinforcement is damaged by drilling a hole, the most damages occur in the core with lower physical and mechanical characteristics. In contrast, the outer thermally strengthened layer with bigger physical and mechanical characteristics is damaged to a lesser extent. The analysis of the obtained results shows that during design of reinforced concrete beams with damaged, it is necessary to consider using thermally strengthened non-uniform steel A500C as tensile main reinforcement.

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“…Among the most urgent problems is the reliable analysis of the stress-strain state and the choice of the reinforcement system for a specific case (Adamczak-Bugno et al, 2022;Kos et al, 2022;Koteš et al, 2022). There is a number of factors that cause the need for strengthening and retrofitting, including changes in design parameters and requirements, environmental impacts, natural and anthropological disasters, ageing, physical wear, corrosion of concrete and reinforcement, etc (Kos et al, 2020;Kramarchuk et al, 2023;Zeng et al, 2022;Blikharskyy et al, 2021 (a,b), Kopiika et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Perspectives and Specific Features of the Use of Composite Materials for Strengthening of Damaged Reinforced Concrete Structures

Kopiika,

Blikharskyy

2023

Theory build. pract.

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The need for strengthening of existing structures has recently become topical. Composite materials due to their remarkable properties, possibility to adaptation to the design requirements and facilitation of restoration measures are widely used for strengthening. This article is focused on review of restoration approaches with the use of composite materials and specific features of their behavior under various impacts. Study includes analysis of recent studies in the area, identifying gaps of knowledge and perspectives for further research. The most relevant areas of research were distinguished including numerical finite element modelling for parametric analysis, deepening of understanding of composites` linearly elastic behavior, approaches to prevent delamination failure. Further thorough research in this area is strongly recommended to deepen the knowledge and maximize the efficiency of use of composite strengthening systems.

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Stress-strain state of damaged reinforced concrete bended elements at operational load level

Cited by 13 publications

References 23 publications

Management of the Special Processes – An Experimental Study of Bent Reinforced Concrete Beams

Management of the Special Processes – An Experimental Study of Bent Reinforced Concrete Beams

Bearing capacity of reinforced concrete beams with and without damages of rebar

Perspectives and Specific Features of the Use of Composite Materials for Strengthening of Damaged Reinforced Concrete Structures

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