Concrete Deformation Model for Reconstructed Reinforced Concrete

Травуш, Владимир; Murashkin, Vasily G.

doi:10.22337/2587-9618-2022-18-4-132-137

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…Для этого при определении коэффициенты А и В для выражения (1), используя методику подробно описанную в [1], достаточно к величине текущих относительных деформаций b добавить величину остаточных относительных деформаций b…”

Section: методunclassified

“…В работе [1] обосновано применение при реконструкции экспоненциальной модели деформирования (1) для бетона, основанной на известном уравнении С. Аррениуса, описывающем кинетические процессы, с учетом адаптации для бетона.…”

Section: Introductionunclassified

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Reflection of Multiple Loading in The Deformation Model for Reconstructed Reinforced Concrete

Murashkin

2023

RST

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During the reconstruction, or upon expiration of the service life, as well as after external impact, reinforced concrete structures require examination and verification calculations. Existing diagrams of concrete deformation are focused on designing new structures and are not adapted to the concretes of the reconstructed structures.Using the exponential model of concrete deformation makes it possible to describe the resistance of concrete during reconstruction, including after repeated cyclic loading.A technique for creating an individual deformations model under cyclic load during the reconstruction is demonstrated on a specific example.

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Section: методunclassified

Section: Introductionunclassified

Reflection of Multiple Loading in The Deformation Model for Reconstructed Reinforced Concrete

Murashkin

2023

RST

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“…However, there is still an open question on considering of alternating temperatures influence on behavior of steel-concrete composite beams. [14][15][16][17][18][19][20]. Hence experimental research of cyclic freezing-thawing (CFT) influence on behavior of steel-concrete composite elements with external steel shell was carried out.…”

Section: Introductionmentioning

confidence: 99%

Results of experimental research of steel-concrete composite beam under cyclic freezing-thawing

Istomin¹,

Kudryavtsev²

2023

AIP Conference Proceedings

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One of the ways to improve the efficiency and quality of reinforced concrete structures is the development and implementation of new building structures, the use of which ensures a decrease in material consumption and cost. These effective structures include steel-concrete structures. An important problem when using steel-concrete structures is to ensure the joint work of steel and concrete, which is determined by the adhesion of materials. Reinforced concrete structures must meet the requirements for safety, serviceability and durability. The question of the operation of steel-concrete structures with external reinforcement in the form of a box section remains poorly understood. At the same time, the question of the influence of cyclic freezing and thawing on the adhesion strength between the metal shell and concrete remains open. In order to identify the features of the work of bent steel-concrete elements with external reinforcement at alternating temperatures, experimental studies were carried out, the results of which on strength and deformability are presented in this article. Investigations were carried out in two directions: first, the influence of the CFT on the change in the adhesion strength between the metal shell and concrete under compression; the second influence of CFT on the joint work of concrete and metal in bent steel-concrete elements.

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Modeling of a Multi-Storey Building Made of Reinforced Concrete, Taking into Account Damage on a Deformable Foundation

Treshchev,

Telichko,

Andronov

2023

RST

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The construction of a mathematical model based on the finite element method for determining the stress-strain state of a 25-storey reinforced concrete building on a multilayer deformable foundation is considered. The sensitivity of the physical and mechanical characteristics of the building and foundation material to the type of stress state, the development of plastic deformations in reinforcement, damage in the form of cracking, and induced heterogeneity are taken into account. The relations for nonlinear isotropic materials proposed in the frame-work of the theory of normalized stress spaces are taken as constitutive relations. A modification of a multilayer triangular hybrid finite element with five degrees of freedom in the node is formulated to describe the features of the mechanical behavior of building structures. A description is given of methods for modeling fictitious layers of an element corresponding to various variants of the stress-strain state of reinforced concrete. Quantitative estimates of the stress-strain state of the combined "building-base" system under the action of static loads of two types are obtained in the form of graphs of the dependence of dis-placements on the magnitude of the load in floor slabs and pylons. According to the results of the research, it was confirmed that taking into account "complicated" ones is necessary to obtain correct estimates of the stress-strain state of buildings.

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Concrete Deformation Model for Reconstructed Reinforced Concrete

Cited by 3 publications

References 2 publications

Reflection of Multiple Loading in The Deformation Model for Reconstructed Reinforced Concrete

Reflection of Multiple Loading in The Deformation Model for Reconstructed Reinforced Concrete

Results of experimental research of steel-concrete composite beam under cyclic freezing-thawing

Modeling of a Multi-Storey Building Made of Reinforced Concrete, Taking into Account Damage on a Deformable Foundation

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