Experimental and numerical studies of stress-strain state of concrete structures reinforced with polymer-composite reinforcement

Piskunov, A. A.; Zinnurov, Tagir; Berezhnoi, Dmitrii; Umarov, B. V.; Volter, Aleksandr

doi:10.15862/02sats218

Cited by 6 publications

(2 citation statements)

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“…From these researches, it is shown that with consideration of nonlinearity, the analysis results converge with the observed behavior of the bridge structures and make them more economical. In research [11][12][13][14][15][16][17][18], the authors have studied many types of road bridge superstructures considering the nonlinearity of material and used the nonlinear deformational models for compressive concrete and reinforcement, pre-stressed reinforcement in the analysis. In this article, besides the nonlinear deformational models in [19], the nonlinear stress-strain relationship of compressive concrete [20] is used to compare the obtained results.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear analysis for proposing limit state criteria of reinforced concrete road bridge superstructures

2023

Archives of Civil Engineering

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In the research of long-time operating road bridge superstructures, it should note that when the internal forces in the beam elements reach specific values, the stiffness of the cross-section of these elements should decrease. Besides that, if there are damaged places in the beam-element of the road bridge superstructures, the element could not work normally, and the redistribution of internal forces between elements in the whole system would happen. This phenomenon was not taken into account in the initial design calculation. In practice, it shows that many road bridges are subjected to greater loads than the calculated loads in the design process, but they still normally operate. This article proposes the other limit state criteria in evaluating the load capacity reserve of road-bridge superstructures using nonlinear analysis based on nonlinear deformational models of modern construction codes. The proposed calculation procedure is established to explain the load capacity reserve of long-time operating road bridge superstructures in the case of the lack of experimental evaluation. From the obtained results, the suitable limit state criteria for road bridge superstructures are suggested, and the conclusions about the accuracy of the proposed approach of nonlinear structural analysis are recommended.

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Section: Introductionmentioning

confidence: 99%

Nonlinear analysis for proposing limit state criteria of reinforced concrete road bridge superstructures

2023

Archives of Civil Engineering

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“…One of the possible ways to solve the problem of high deformability of concrete structures and, at the same time, high cracking is the use of prestressed polymer composite reinforcement [11].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear deformation of concrete structure elements taking into account compensation grouting and fracturing

Kuznetsova,

Berezhnoi,

Ekhsayem

et al. 2023

E3S Web Conf.

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A formulation of the problem of compensatory injection was implemented using consistent equations of the elastic geometrically nonlinear three-dimensional theory. Algorithm for numerical solution was developed within the framework of the finite element method. A technique had been developed for the processes of crack formation in elements with prestressed reinforced polymer composite. A model problem was solved and comparison with experimental data was made.

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Pilot Studies of Concrete Beams Deformability Reinforced with Composite Reinforcement

Vetrova

2020

Proceedings of the SWSU

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Purpose of research. Analysis is done on the basis of experimental data of loading level impact on deformability of beams with steel and composite fiberglass reinforcement at prolonged loads.Methods. Experimental studies of concrete bending elements of two series were carried out: the first is reinforced with composite fiberglass reinforcement of ASK class, the second is reinforced with steel reinforcement of А400 class. Studies of experimental samples were carried out under long-term loads. The structures were under different loads during the experiment: at design load, at 1.2 level from design load and at 1.5 from the design load. Concrete deformations and deflections of experimental beams of two series were fixed.Results. Dependence on time of concrete deformations of experimental samples of two series at different loading levels, dependence of deflection growth on load application level, influence dependence of loading level of elements on speed and intensity of creep deformation growth of beams with fiberglass and steel reinforcement are stated on the basis of experimental data. In particular, the bends of all samples with fiberglass reinforcement exceeded the maximum permissible value, while the maximum deflection of reinforced concrete beams in the middle of the section did not exceed maximum permissible value.Conclusion. On the basis of the obtained data, conclusions are drawn on the nature and magnitude of long-term deformations of beams with fiberglass and steel reinforcement at different levels of long-term loads. This conclusion is significant in practical sense when using concrete structures with composite reinforcement taking into account a small number of research data.

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Experimental and numerical studies of stress-strain state of concrete structures reinforced with polymer-composite reinforcement

Cited by 6 publications

References 1 publication

Nonlinear analysis for proposing limit state criteria of reinforced concrete road bridge superstructures

Nonlinear analysis for proposing limit state criteria of reinforced concrete road bridge superstructures

Nonlinear deformation of concrete structure elements taking into account compensation grouting and fracturing

Pilot Studies of Concrete Beams Deformability Reinforced with Composite Reinforcement

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