The research on bearing capacity of supports with annular section

Shchutskiy, V. L.; Nasevich, Alina S.; Чубаров, В Е; Blyagoz, Alik

doi:10.1088/1757-899x/698/2/022089

Cited by 4 publications

(5 citation statements)

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“…In this work, which is a continuation of the previous studies [8][9][10], the results of a numerical experiment on the study of the bearing capacity, bending rigidity and the critical force of annular struts under short-term and long-term loads are presented. A cylindrical support was adopted as a test sample PTL according to GOST 22687.2, the parameters of which are given in Table 1.…”

Section: Main Partmentioning

confidence: 88%

“…The methodology for calculating such structures in the new standards BC 63.13330.2018 [7] has not undergone significant changes. However, we analyzed in detail some features of the calculation according to the new standards in [8].…”

Section: Introductionmentioning

confidence: 99%

“…It should be noted that most of the above-mentioned studies, including ours [8,10], were based on the results of the short-term loads' impact on structures. Insufficient attention has been paid to the study of the long-term loadings influence on the operation of structures with an annular section.…”

Section: Introductionmentioning

confidence: 99%

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Influence of long-term exposure to loads on the annular sections’ strength and rigidness

et al. 2021

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A numerical experiment was carried out to study rigidity, critical force, and bearing capacity of reinforced concrete racks with annular section under short-term and long-term loading. The effect of long-term loading was estimated in the numerical experiment by changing the coefficient φl from 1 to 1.8 times 0.2, as well as the modulus of deformations Eb,τ, taking into account the operating conditions (W = 40-75%). At the same time, the external load on the rack N was taken in the experiments as a multiple of the critical force Ncr from 0.2 to 1.0, and the relative eccentricity δe of the load application varied from 0.15 to 1.35, which made it possible to estimate the stress state of the struts in an extended range of possible loadings. The results obtained made it possible to identify qualitative and quantitative regularities of rigidity changes, critical force and bearing capacity of annular struts during short-term and long-term load application.

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Section: Main Partmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Influence of long-term exposure to loads on the annular sections’ strength and rigidness

et al. 2021

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“…Вышеуказанные исследования легли в основу норм СНиП 2.03.01-84 «Бетонные и железобетонные конструкции» для расчета конструкций кольцевого сечения из железобетонов. Что касается новых норм СП 63.13330.2018 «Бетонные и железобетонные конструкции», то ранее предложенный метод расчета конструкций в них в существенной степени не изменился, хотя и появились некоторые особенности расчета, что подробно описано в [7].…”

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“…построены в виде графиков пропорциональные зависимости, наглядно показывающие изменения критической силы цилиндрических стоек при длительных нагружениях с учетом изменения влажности окружающей среды и связанного с этим изменения модуля деформации конструкций.− подробно изучено изменение несущей способности исследуемых элементов с увеличением отношения продольной силы к критической продольной силе.Материалы и методы. В данной статье, являющейся продолжением ранее выполненных изысканий[7][8][9], приведены результаты численного эксперимента по изучению несущей способности, жесткости на изгиб, максимальной силы для опор линий электропередач при кратковременном и длительном действии нагрузок. Как исследуемый образец взята цилиндрическая опора линии электропередач по ГОСТ 22687.2.𝑀 𝑢𝑙𝑡 ≤ (𝑅 𝑏 𝐴 𝑏 𝑟 𝑚 + 𝑅 𝑠𝑐 𝐴 𝑠,𝑡𝑜𝑡 𝑟 𝑠 )…”

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Influence of the Long-Term Loading on the Strength and Rigidity of the Annular Section Poles

Shchutskiy,

Efimenko

2023

jour

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Introduction. The modern methods of analysis and conducting the numerical experiments referring to calculation and design of constructions are mostly aimed at a deeper study of parameter changes of different structures exposed to the influence of the certain loads. Due to the course of time and upon obtaining and analysing the new results of the numerical studies, there arises the need to revise and update the normative documents developed in the past in the frame of studying the certain modes of structures’ operation. Bearing in mind the above-mentioned objective, the numerical study presented in this article has been carried out.Materials and Methods. It should be mentioned, that most of the previously conducted research was based on the results of the short-term exposure of the structures to the loads, but not enough attention was paid to the study of the influence of the long-term loading on the structures' operation. This paper presents the results of the numerical experiments investigating the load-bearing capacity, flexural rigidity and maximum force of the power transmission line poles exposed to the short-term and long-term loads. The specimen under study is the cylindrical power transmission line pole complying with the GOST 22687.2 “Centrifugal cylinder reinforced concrete posts for high-voltage transmission lines”.Results. The paper presents the results of studying the behaviour of the cylindrical reinforced concrete poles, serving as the supports for the electrical power transmission lines, under the short-term and long-term loading. The work provides the results of numerical experiments investigating the strength and rigidity parameters of the above-mentioned structures under different types of loading, as well as upon changing the eccentricities of the application of these loads. The assessment of the rigidity parameters change under the long-term exposure of the poles to the loads is carried out.Discussion and Conclusion. Based on the results, obtained during the numerical experiments, the strength and rigidity parameters of the annular section power transmission line poles were analysed, and proposals for improving the design codes were made that could become a basis for the further research on this issue.

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Influence of Various Factors on the Strength of Oblique Section of Beams Reinforced with Double-Sided Composite Clamps

Polskoy

2022

Lecture Notes in Networks and Systems

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The research on bearing capacity of supports with annular section

Cited by 4 publications

References 1 publication

Influence of long-term exposure to loads on the annular sections’ strength and rigidness

Influence of long-term exposure to loads on the annular sections’ strength and rigidness

Influence of the Long-Term Loading on the Strength and Rigidity of the Annular Section Poles

Influence of Various Factors on the Strength of Oblique Section of Beams Reinforced with Double-Sided Composite Clamps

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