Analysis of nonlinear deformations of reinforced concrete beams using the finite element method

Sakhno, S; Lyulchenko, Ye.V.; Yanova, L.A.; Pishchikova, O.V.

doi:10.31721/2306-5435-2020-1-108-27-34

Cited by 3 publications

(3 citation statements)

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“…Obviously, with the development of information technologies and the improvement of calculation methods, the number of reliability studies of various RC members is also increasing. Today, there are quite a lot of works devoted to the analysis of nonlinear deformations of beams [5], the influence's study of the material's rheological properties in the calculation of slab [6], the review of existing [7] and the development of new [2,3] concepts for assessing the reliability of structures (including strengthened under load), etc. However, there was no transition from quantitative indicators of reliability to similar indicators of durability in these works.…”

Section: Existing Durability Assessment Modelsmentioning

confidence: 99%

Durability evaluation issues of reinforced concrete structures during operation: a review and perspectives

Tytarenko,

Khmil,

Selejdak

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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This article is devoted to analyzing several existing models and methods for the probabilistic durability assessment of reinforced concrete (RC) structures during operation. For this task, the authors reviewed and analyzed many existing studies by Ukrainian and foreign researchers in this field and highlighted the problems of a normative and calculation base. As determined, almost all design norms consider durability (or residual resource) regarding RC structures’ design and operation practice (without considering their life cycle), including the stochastic model’s construction in a specific environment. According to the author’s point of view, an initial random data package for all individual tasks is necessary due to the durability assessment issues’ complexity. In turn, that requires including parameters of the member’s bearing capacity reserve (materials’ strengths, dimensions of sections, etc.) and its service conditions (different types of actions) which are stochastic. Based on the studies reviewed, the authors also emphasize the main advantages and disadvantages of the models and methods described here. Also they formulated the recommendations for further studies in this field, namely expanding the use of numerical simulations (including Monte Carlo methods) to creating a fundamental base of a unified practical system for the reliability management (including durability) of RC structures during operation.

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Section: Existing Durability Assessment Modelsmentioning

confidence: 99%

Durability evaluation issues of reinforced concrete structures during operation: a review and perspectives

Tytarenko,

Khmil,

Selejdak

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…The calculation of the parameters of the Drucker-Prager model was carried out according to the methods proposed in the works [24][25][26][27][28][29]. The validity of the accepted parameters was tested in the work [30].…”

Section: Features Of Concrete Modellingmentioning

confidence: 99%

Modelling and experimental studies of the stress-strain state of compressed concrete filled steel tube elements of a continuous section

Yermolenko,

Sakhno,

Palyvoda

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Modern building structures must meet the requirements of efficiency and resource-saving. The main direction for implementing these requirements is to reduce the consumption of steel (14–16%) and save cement (10–12%). These tasks can be solved through the rational combination of concrete and steel when they work together and the use of high-strength materials. One embodiment of this task is the use of Concrete Filled Steel Tube (CFST) structures. The purpose of this study is to identify the possibility of using the Drucker-Prager model by comparing the results of test studies on short compressed Concrete Filled Steel Tube (CFST) elements with different strength and deformation characteristics of the concrete core to the results from finite element analysis (FEA) modelling of corresponding CFST elements. Additionally, the behaviour of a steel pipe without a concrete core was investigated. The results show that the FEA method used in this work is sufficiently accurate for studying the behaviours of short CFST elements. The modelling technique adopted in the study made it possible to consider the redistribution of stresses in the concrete and pipe dynamically. The stress distribution patterns inside the concrete during both linear and non-linear deformations of CFST elements, as well as the characteristics of the interaction between the concrete and pipe in the contact zone, have been revealed.

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“…Based on the above, as well as the adaptation of national standards for the RC structures design (Concrete and reinforced concrete structures made of heavy concrete, DSTU, 2011), in terms of their application in the reliability theory (probabilistic calculation methods), it becomes obvious: the topicality of the problem of developing of such a methodology for assessing the non-failure of RC structures, which makes it possible to take into account the complete picture of the stochastic nature of their work, is undeniable. Moreover, based on the review of recent studies of the stress-strain state of RC structureswith damages (Voskobiinyk, 2010;Klymenko, Antoniuk & Polianskyi, 2019), under the action of an aggressive environment (Faye, 2017;Khaghanpour, Dousti & Shekarchi, 2017;Chen, Sun, Hu & Shi, 2021), taking into account the influence of RC nonlinear work (Sakhno, Lyulchenko, Yanova & Pyshchykova, 2020) or its rheological properties (Bashynska, 2019;Heraskin, Rotko & Uzhehova, 2020), as well as actual climatic loads (Pashinsky, 2015) -there is a need to develop their stochastic models.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Existing Concepts to Evaluate the Non-Failure of Rc Structures in Operation

Tytarenko¹,

Khmil²,

Dankevych³

2021

Theory build. pract.

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The article presents a theoretical analysis of existing concepts to evaluate the non-failure of RC structures in operation. To perform the analysis, the authors considered a number of scientific works of both Ukrainian and foreign researchers. The main focus was on works in which the model of the stochastic nature of the RC structure operation included random parameters of acting loads, as well as the reserve of its bearing capacity and serviceability (geometric dimensions of cross sections of constructive members, strength and deformation characteristics of materials, etc.). Among others, according to the authors, important problems in terms of analysis of a single work were the volume of statistical selection of random parameters, their number and impact on the study result, as well as rationality of the adopted method of calculating the probability of failure (or non-failure work) of RC structure in operation. Based on the processing of a number of scientific works, the authors highlight the relevance, advantages and disadvantages of the concepts of non-failure assessment proposed there, as well as the formulate the conclusions and recommendations for further experimental and theoretical research in this area.

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Analysis of nonlinear deformations of reinforced concrete beams using the finite element method

Cited by 3 publications

References 0 publications

Durability evaluation issues of reinforced concrete structures during operation: a review and perspectives

Durability evaluation issues of reinforced concrete structures during operation: a review and perspectives

Modelling and experimental studies of the stress-strain state of compressed concrete filled steel tube elements of a continuous section

Theoretical Analysis of Existing Concepts to Evaluate the Non-Failure of Rc Structures in Operation

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