scholarly journals Nonlinear Calculations of the Strength of Cross-sections of Bending Reinforced Concrete Elements and Their Practical Realization

2018 ◽  
Author(s):  
Kochkarev Dmitriy ◽  
Galinska Tatyana
Keyword(s):  
Reinforced Concrete ◽  
Cross Sections ◽  
Practical Realization ◽  
Concrete Elements

scholarly journals Improved engineering method for calculating the strength of the supporting areas of reinforced concrete elements

2018 ◽  
Vol 230 ◽  
pp. 02014 ◽  
Author(s):  
Olena Krantovska ◽  
Mykola Petrov ◽  
Liubov Ksonshkevych ◽  
Sergii Synii ◽  
Pavlo Sunak
Keyword(s):  
Reinforced Concrete ◽  
Comparative Analysis ◽  
Cross Sections ◽  
Experimental Studies ◽  
Engineering Calculation ◽  
Standard Methods ◽  
Refined Method ◽  
Eurocode 2 ◽  
The World ◽  
Concrete Elements

According to the results of experimental studies, empirical dependencies were obtained (obtained from the appropriate mathematical models). The advanced (refined) method of engineering calculation of express-estimation of the strength of sloping cross sections of elements of flexible reinforced concrete structures on the basis of comparative analysis of the obtained empirical dependencies and standard accepted methods in the world was developed (nine basic norms are taken: DSTU B.V.2.6-156:2010 (Ukraine), previously operating SNiP 2.03.01-84*, SNB 5.03.01-02 (Belarus), SR 63.13330.2012 (Russia), Eurocode 2, 2004 (European Union), ACI 318-M14 (USA), AIJ Code, 2007 (Japan), CSA 23.3-04 (Canada), DIN 1045-1 (Germany). The coefficient of variation of bearing capacity and accident ratio according to the results of calculations of standard methods are determined. Their comparative analysis is carried out and informative graphic figures are presented.

scholarly journals Simulation of the Stress-Strain State of Eccentrically Compressed and Tensioned Reinforced Concrete Beams

2020 ◽  
Vol 2 (1) ◽  
pp. 207-214
Author(s):  
Vasyl Karpiuk ◽  
Yuliia Somina ◽  
Oksana Maistrenko ◽  
Fedir Karpiuk
Keyword(s):  
Reinforced Concrete ◽  
Cross Sections ◽  
Strain State ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Improved Method ◽  
Stress Strain ◽  
Stress Strain State ◽  
Strain Behaviour ◽  
Concrete Elements

AbstractThe paper deals with the working peculiarities of the support zones of reinforced concrete elements subject to bending with due account of the eccentric compression and tension. The authors performed simulation of the stress-strain behaviour of the indicated structures with the aid of “Lira” software which results are shown in the graphical and tabulated form. The performed simulation allowed of tracing the work of the studied sample beams till collapse. Such approach made it possible to single out and generalize the main collapse patterns of the inclined cross-sections of the reinforced concrete elements subject to bending on which basis the authors developed the improved method to calculate their strength (Karpiuk et al., 2019).

Rational Placement of a Steel Fiber in Sections of the Combined and Monolithic Bent Reinforced Concrete Elements

2018 ◽  
Vol 931 ◽  
pp. 358-361 ◽  
Author(s):  
Yusup M. Hasauov
Keyword(s):  
Reinforced Concrete ◽  
Cross Sections ◽  
Steel Fiber ◽  
Analytical Dependence ◽  
Economical Design ◽  
The Cross ◽  
The Individual ◽  
Concrete Elements

In the article some considerations to optimize the cross-sections of prefabricated-monolithic combined reinforced bent elements are given. The analytical dependence that allows more economical design of the structures in question taking into account the strength and quantity parameters, as well as the geometric dimensions of the individual components of the prefabricated-monolithic section and their relationships is proposed.

scholarly journals Residual resource of power resistance during building structures deformation

2019 ◽  
Vol 135 ◽  
pp. 03009 ◽  
Author(s):  
Ekaterina Kuzina ◽  
Vladimir Rimshin ◽  
Alexey Neverov
Keyword(s):  
Reinforced Concrete ◽  
Cross Sections ◽  
Residual Life ◽  
Deformable Body ◽  
Bending Moment ◽  
Discrete Models ◽  
Building Structures ◽  
Resistance To Deformation ◽  
Concrete Elements ◽  
Research And Design

Modern scientific research and design developments, based on the fundamental principles of physics, mechanics and thermodynamics, are developing in a phenomenological direction. This implementation is found both in traditional integrated models of reinforced concrete using the advantages of computer technology, and in discrete models following the grid methods of solid deformable body mechanics. Discrete models in content and chronology over time are hereditary with respect to integral models. The theoretical basis for calculating the residual life of the force resistance to deformation, determines the stiffness of the cross sections of reinforced concrete elements with a maximum bending moment and with zero bending moment are presented in this article.

scholarly journals STRENGTH OF REINFORCED CONCRETE IN BENDING ELEMENTS CALCULATIONS

2017 ◽  
Vol 1 (48) ◽  
pp. 62-71
Author(s):  
A. Pavlikov ◽  
D. Kochkarev ◽  
O. Garkava
Keyword(s):  
Reinforced Concrete ◽  
Cross Sections ◽  
Geometric Characteristic ◽  
Concrete Specimen ◽  
Engineering Method ◽  
Stress Strain ◽  
Strength Of Materials ◽  
Design Strength ◽  
Concrete Elements

The concept of the design strength of reinforced concrete in bending elements is proposed. This concept can be considered a generalized description of concrete. Such approach makes it possible to consider not only the separate strength of concrete and reinforcement, but also their interaction. The design strength of reinforced concrete is determined by ratio of force, which causes destruction of the standard reinforced concrete specimen, to the corresponding geometric characteristic. It was found that using the introduced concept the calculation of reinforced concrete elements can be reduced to well-known formulas of the strength of materials. It is based on generally accepted hypothesis and stress-strain diagrams of materials. The engineering method is developed, which allows to calculate the strength of the bending reinforced concrete elements of rectangular and circular cross-sections equally simple.

scholarly journals The use of FRP of increased thickness for strengthening structures

2021 ◽  
Vol 263 ◽  
pp. 02033
Author(s):  
Oleg Simakov
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Cross Sections ◽  
Experimental Studies ◽  
Calculation Methods ◽  
Reinforcement System ◽  
External Reinforcement ◽  
Concrete Elements

The external reinforcement system based on carbon fiber has been used for decades to strengthen reinforced concrete elements. At the same time, it is impossible not to recognize that the existing calculation methods are largely based on empirical dependencies obtained from experimental studies. One of these issues is related to the application of the methodology for materials of heterogeneous origin-tapes and laminates. In general, the possibility of applying the calculation methods accepted in the norms for laminates of generally accepted thicknesses up to 1.6 mm is determined. The question related to the possibility of using laminates of greater thickness is not sufficiently studied. This article deals with the calculation of the reinforcement of the normal cross sections of the bent reinforced concrete elements with the reinforcement of laminates with a thickness of 5 mm.

scholarly journals Bending deflection reinforced concrete elements determination

2018 ◽  
Vol 230 ◽  
pp. 02012 ◽  
Author(s):  
Dmitriy Kochkarev ◽  
Taliat Azizov ◽  
Tatyana Galinska
Keyword(s):  
Reinforced Concrete ◽  
Cross Sections ◽  
Equilibrium Equations ◽  
Plastic Properties ◽  
Precise Calculation ◽  
Limited Application ◽  
Building Practice ◽  
Concrete Elements ◽  
Deformation Diagrams ◽  
Determining Factor

Longitudinal reinforced concrete elements stiffness exhaustion, often used in building practice, precedes obtaining bearing capacity, and therefore deflections determination becomes a determining factor in their design. In connection with it precise methods for determining such reinforced concrete elements deflections become especially relevant. The elastic-plastic properties of concrete and cracks in the stretched zone of reinforced concrete elements lead to a significant change in their bending stiffness. That is why the deflections determined by the materials classical resistance formulas differ significantly from the real ones. A large quantity of methods for determining deflections is based on the elastic characteristics correction of reinforced concrete elements consolidated section. Such methods, although providing calculation satisfactory results, are rather approximate and have empirical nature, due to it they have limited application. More precise calculation methods consist of curvature usage to determine deflections. The curvature of reinforced concrete elements cross sections is determined directly from the equilibrium equations, which are written taking into account nonlinear materials deformation diagrams. Calculation examples for bending reinforced concrete elements deflection are given.

scholarly journals THE EXPERIMENTAL RESEARCHES OF THE DEFORMABILITY OF THE BENDING REINFORCED CONCRETE ELEMENTS WITH THE VARIOUS CROSS SECTIONS

2017 ◽  
Vol 2 (4) ◽  
pp. 56-59
Author(s):  
Обернихин ◽  
Dmitriy Obernihin ◽  
Никулин ◽  
Aleksandr Nikulin
Keyword(s):  
Reinforced Concrete ◽  
Cross Sections ◽  
Experimental Researches ◽  
Concrete Elements
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