Version of the deformation theory of plastic ductility of concrete in a plane stress state

Kruglov, Valeriy; Erofeev, Vladimir; Vatin, Nikolay; Al-Dulaimi, Salman Dawood Salman

doi:10.15862/11sats419

Cited by 2 publications

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“…The choice of the equations for the functions η and ψ is based on the assumptions set forth in [17]. The expression for ψ, obtained by modifying V.Sokolovsky's formula [18], has the form:…”

Section: Variable Parameters Of Elasticity Of Concrete and Reinforced...mentioning

confidence: 99%

Calculation of Reinforced Concrete Prismatic Shells by the Finite Element Method Using Variable Elasticity Parameters

Kruglov

Юрченко

2019

MSF

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The paper considers the modification of the generally accepted formulation of the finite elements method by applying in the calculation I.Mileykovski’s refined technical theory of shells that takes into account the deformations of the transverse shear along the thickness of the model. When applying this solution path, it is possible to calculate thick and thin shells (plates) with equal efficiency, taking into account the complex strained state of an anisotropic material. It illustrates the inclusion in the computational algorithm of variable parameters of the elasticity of concrete, allowing more accurate evaluation of the stress-strain state in the finite element under complex (combined) loads. The presence of reinforcement in the material is modeled by dividing the structure into layers and sequentially reduction the elastic characteristics of the material based on the volume ratio of the components. The advantage of the algorithm is the ease of its integration with the conventional finite elements method. All transformations in this case consist in the modification of expressions for determining the elastic characteristics of the construction, calculating the gradient and stiffness matrices, while the sequence of further calculations does not change. This enables to use the proposed algorithm, including as a plug-in software module, expanding the capabilities of existing computing programs. The article demonstrates the application of the method in modeling a reinforced concrete slab made with the use of multi-component high-strength concrete of a heavy class having a prismatic strength under uniaxial compression of more than 110 MPa.

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Section: Variable Parameters Of Elasticity Of Concrete and Reinforced...mentioning

confidence: 99%

Calculation of Reinforced Concrete Prismatic Shells by the Finite Element Method Using Variable Elasticity Parameters

Kruglov

Юрченко

2019

MSF

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Features of application of modern types of concrete in transport construction

Varakin

Ovchinnikov

2020

Russian journal of transport engineering

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The paper considers the problem of using modern types of concrete, in particular self-compacting concrete, fiber concrete and ultra-high-strength concrete. The issues of the importance of analyzing the possibility of using innovative types of concrete were raised in order to improve the quality of the resulting structures, increase their durability, reduce labor costs, reduce the time of work. The principle of operation of self-compacting concrete and concrete using various fibers instead of conventional reinforcement is described. Their strength characteristics are shown, the principle of operation, the features of its use, as well as manufacturing methods are described. The main types of fibers, both metallic and non-metallic, are distinguished, their main features are described. It also discusses the importance of adhering to the technology for laying concrete mixtures and how to care for them. Examples of their possible and actual use in transport construction and not only are given. The experience of using self-compacting concrete and fiber concrete in tunneling, bridge building. The issues of their development and features of their application are raised. The importance of their use from an environmental point of view (the use of recycled materials) is noted. A comparison of the main mechanical characteristics of several types of concrete (ultrahigh-strength concrete, high-strength concrete, ordinary concrete) is carried out. The principle of tensile operation of ultrahigh-strength concrete in comparison with other materials is considered. Using the authors’ works as an example, the work emphasizes the importance of further research of these materials, the development of regulatory documentation for further implementation in various areas of construction, the importance of developing new types of reinforced concrete structures with new section shapes, which is possible with the correct approach and use of modern materials, is emphasized.

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Version of the deformation theory of plastic ductility of concrete in a plane stress state

Cited by 2 publications

References 1 publication

Calculation of Reinforced Concrete Prismatic Shells by the Finite Element Method Using Variable Elasticity Parameters

Calculation of Reinforced Concrete Prismatic Shells by the Finite Element Method Using Variable Elasticity Parameters

Features of application of modern types of concrete in transport construction

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