The Ideal Plasticity Theory Usage Peculiarities to Concrete and  Reinforced Concrete

Pohribnyi, Volodymyr; Dovzhenko, Oksana; Maliovana, O. O.

doi:10.14419/ijet.v7i2.26.14369

Cited by 12 publications

(4 citation statements)

References 10 publications

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“…The reinforcement areas Asi are determined for each section according to the recommendations given in [2].…”

Section: Resultsmentioning

confidence: 99%

Optimization Approach to Flat Slab Reinforced Concrete Building Frame Design

Mykytenko,

2018

IJET

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In the article it is proposed to use optimization methods for the flat slab reinforced concrete frames design in order to reduce the reinforced steel and concrete costs during the construction. The use of flat slab reinforced concrete frames is a promising direction for providing citizens with affordable housing. It is proposed to implement rational design of flat slab reinforced concrete building frames using the methods of structural-parametric optimization and discrete-continuous mathematical programming. To solve the problem, conditional optimization methods are applied. The algorithm for calculating the frame of a multi-storey building has been developed. The algorithm is implemented by available means and does not require the creation of special computer programs. The author of the article implements a combination of discrete and continuous optimization methods for reinforced concrete structures calculation. This method application allows to design efficient flat slab reinforced concrete frames for the affordable housing construction.Â Â Â

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“…The reinforcement areas Asi are determined for each section according to the recommendations given in [2].…”

Section: Resultsmentioning

confidence: 99%

Optimization Approach to Flat Slab Reinforced Concrete Building Frame Design

Mykytenko,

2018

IJET

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“…In the case of application of virtual velocities principle [10,16], the dependence ( 6) has the following form…”

Section: Calculating Methods For Corbels Based On the Plasticity Theorymentioning

confidence: 99%

Bearing capacity calculation of reinforced concrete corbels under the shear action

et al. 2018

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The necessity of creating a general methodology for concrete and reinforced concrete elements strength calculation under the shear is established. Three failure cases of reinforced concrete corbels under the shear are considered. The solutions of problems of corbels strength with failure along the whole section, close to the normal, in the compressed zone under an inclined crack and within the compressed inclined strip are given. A variational method in the plasticity theory, the virtual velocities principle and the characteristic lines method are used for concrete and reinforced concrete elements calculations. In the ultimate state, concrete is considered as a rigid-plastic body. The shear is realized in case when the plastic deformation is localized in the compressed zone. The calculating ultimate load results for different failure cases are given. Such a design scheme is implemented, in which the console strength is minimal. This corresponds to the minimum of power of plastic deformation in concrete compressed zone. Reinforced concrete corbels calculation engineering methods are offered. The elements obtaining effective constructive decisions direction based on the plasticity theory use is determined.

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“…The main task in the calculation of stone structures is to determine the loadbearing capacity of walls and columns subjected to loads compression Thus, in equation (20), the material parameter that determines the resistance of the wall or column is the compressive strength of the masonry (…”

Section: Rd M Mmentioning

confidence: 99%

Masonry Reliability Under Diagonal Splitting

Usenko,

Usenko

2023

Science, Technology and Innovation in the Modern World

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In this work, the issue of reliability assessment of masonry of existing building structures is covered. Attention is paid to the specificity of diagnostics and calculation of the reliability of these types of objects. Methods of determining the compressive strength of masonry in existing building structures are presented, taking into account the theory of reliability. Practical solutions are provided for determining the design strength of the masonry, which can be used in assessing the safety of massive brick walls and pillars, which are important structural elements of the existing brickwork. Stone houses have been the main building type in cities for centuries and many of them have survived to the present day. However, during the reconstruction and repair of such buildings, it is necessary to carry out calculations and tests to ensure their safe operation. The safety and reliability of a structure depends on many factors, such as the load applied to it and its bearing capacity. Given an acceptable probability of failure, reliability theory takes into account probabilistic approaches and methods for assessing and managing structural failure risks. Building codes and regulations provide requirements for load-bearing capacity, deformation and fire resistance of the structure, taking into account the social, economic and environmental consequences of failure. Characteristic damages of stone walls under the combined action of vertical and horizontal loads are analyzed. Considered possible patterns of masonry destruction. Diagonal shift is singled out as a typical case of wall failure under seismic effects. Emphasis is placed on the closeness of the loading conditions of load-bearing walls under the action of seismic force to those that occur in the frame when it is skewed. The results of experimental studies of stone samples on skew as models of the work of walls under seismic influences are considered. The nature of destruction, the determining factors affecting the load-bearing capacity of stone walls are analyzed: masonry material, strength of stone and mortar, internal and external reinforcement of masonry. On the basis of the analysis of experiments, suggestions are provided regarding kinematically possible schemes for the destruction of stone blocks, which are proposed as the basis for calculation. The problem of wall strength was solved by the variational method in the theory of plasticity, developed at the National University "Yuri Kondratyuk Poltava Polytechnic". The influence on the strength of the dimensions of the element and the platform of load application is considered.

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The Ideal Plasticity Theory Usage Peculiarities to Concrete and Reinforced Concrete

Cited by 12 publications

References 10 publications

Optimization Approach to Flat Slab Reinforced Concrete Building Frame Design

Optimization Approach to Flat Slab Reinforced Concrete Building Frame Design

Bearing capacity calculation of reinforced concrete corbels under the shear action

Masonry Reliability Under Diagonal Splitting

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