scholarly journals APPLICATION ISSUES OF EUROCODES IN BUILDING DESIGN IN THE RUSSIAN FEDERATION

2021 ◽  
pp. 117-123
Author(s):  
Vladimir TRAVUSH ◽  
Yuri VOLKOV
Keyword(s):  
Reinforced Concrete ◽  
Russian Federation ◽  
Building Materials ◽  
Building Design ◽  
Reinforced Concrete Structures ◽  
Protective Layers ◽  
Eurocode 2 ◽  
The Russian Federation ◽  
Domestic Practice ◽  
Materials Used

With the development and simplification of The article describes the application of European norms in the domestic practice for the design of reinforced concrete structures using European norms Eurocode-2. For Eurocode-2, the number of nationally defined parameters is more than a hundred. These are different coefficients, shrinkage, creep of concrete, thickness of protective layers of concrete for steel fittings depending on the type, environment of operation, etc. Differ in the SNIP on the design of designs and individual Eurocodes, the size and shape of the samples tested to determine the strength (regulatory) characteristics of building materials, making it impossible to apply many of the calculation formulas directly. Addressing these issues is a rather capacious task. Many series of prototypes will be required only to determine statistically reliable transitional coefficients for the strength of the materials used in SNIP and Eurocodes.

Factors of the current growth of the value of investment-and-construction projects implementation in the Russian Federation

2021 ◽  
pp. 4-12
Author(s):  
E.Yu. Vasilyeva
Keyword(s):  
Russian Federation ◽  
Construction Projects ◽  
Building Materials ◽  
Price Dynamics ◽  
Current Growth ◽  
The Russian Federation ◽  
Major Factors

The author analyses the factors, which affected the volume of actual costs of investment-and-construction projects in 2020-2021 most of all. The three major factors, including price dynamics in the market of building materials, situation in the market of construction tools and equipment as well as the trends in the transport-and-logistic sphere are considered. The order of modification of the Technique of drawing up the estimate of the contract on the project, caused by the growth of costs for the used materials is described. The conclusions on the prerequisites of the rise in price of the realization value of the construction projects in current and following year are drawn.

Damage of Reinforced Concrete Structures due to Steel Corrosion

2015 ◽  
Vol 1111 ◽  
pp. 187-192
Author(s):  
Corina Sosdean ◽  
Liviu Marsavina ◽  
Geert de Schutter
Keyword(s):  
Reinforced Concrete ◽  
Building Materials ◽  
Structural Integrity ◽  
Colorimetric Method ◽  
Concrete Structures ◽  
Steel Corrosion ◽  
Degradation Process ◽  
Reinforced Concrete Structures ◽  
Chloride Ingress ◽  
Rc Structures

Reinforced concrete (RC) became one of the most widely used modern building materials. In the last decades a great interest has been shown in studying reinforcement corrosion as it became one of the main factors of degradation and loss of structural integrity of RC structures. The degradation process is accelerated in the case of RC structures situated in aggressive environments like marine environments or subjected to de-icing salts. In this paper it is shown how steel corrosion of the embedded rebars occurs and how this affects the service life of reinforced concrete structures. Also, an experimental study regarding the combined effect of carbonation and chloride ingress was realized. Samples with and without rebars were drilled from a RC slab which was stored in the laboratory for two years. Non-steady state migration tests were realized in order to determine the chloride profile, while the carbonation depth was measured using the colorimetric method based on phenolphthalein spraying. It was concluded that carbonation has a significant effect on chloride ingress, increasing it.

scholarly journals Adhesion characteristics of geopolymer mortar to concrete and rebars

2019 ◽  
Vol 258 ◽  
pp. 01012 ◽  
Author(s):  
Sanjay Pareek ◽  
Hiroo Kashima ◽  
Ippei Maruyama ◽  
Yoshikazu Araki
Keyword(s):  
Reinforced Concrete ◽  
Building Materials ◽  
Concrete Structures ◽  
Acid Resistance ◽  
Steel Plates ◽  
Alkali Concentration ◽  
Reinforced Concrete Structures ◽  
Interfacial Zone ◽  
Adhesion Properties ◽  
Repair Materials

In recent years, geopolymers have gained a wide attention as highly ecological-friendly building materials, having a capability to cut down 70% of CO2 emissions in comparison to the ordinary cement concrete. In this study, geopolymer mortars are proposed as repair materials for reinforced concrete structures, due to their superior acid resistance, heat resistance and high strength in comparison to the existing repair materials. The objective of this study is to investigate the adhesion properties of geopolymer mortars to concrete substrates with different surface treatments, steel plates and rebars. As a result, the geopolymer mortars are found to have excellent adhesion properties to dry concrete substrates, steel plates and rebars. Concrete substrates treated with grinder, further enhanced the adhesion properties of geopolymer mortars. On the other hand, poor adhesion of geopolymer mortars to wet concrete substrates was observed due to the presence of water on the interfacial zone, which decreased the alkali concentration of the geopolymer, resulting in lower adhesion strength. In general, geopolymer mortars are found to have suitable adhesion properties to the concrete substrates, steel plates and rebars and can be applied as repair materials for reinforced concrete structures.

Research on Parameters of RC Structure Reliability

2014 ◽  
Vol 501-504 ◽  
pp. 1061-1064
Author(s):  
Bin Cai ◽  
Xin Hui Liu
Keyword(s):  
Reinforced Concrete ◽  
Structural Reliability ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Engineering Structures ◽  
Reliability Design ◽  
Structure Reliability ◽  
Rc Structure ◽  
Practical Engineering ◽  
Materials Used

In the analysis of engineering structures are usually adopt the method of fixed value, that is the practical engineering structure under load and the performance of materials used by structure shall be treated as a constant value.But, in fact, the structure of geometry size, bear the load, material parameters,computing model and so on are affected by various factors. In order to more accurately reflect the reliability problems of reinforced concrete structures, this paper, the factors above will be regarded as random variables, combining the basic theory of reliability design, through the probability analysis, in normal uselimit state reliability of reinforced concrete structures for example analysis of the influence of related parameters on the structural reliability.

The Problems of Transition to the International Standards on Auditing

Auditor ◽  
2018 ◽  
Vol 4 (5) ◽  
pp. 19-24 ◽  
Author(s):  
Ирина Егорова ◽  
Irina Egorova
Keyword(s):  
Russian Federation ◽  
International Standards ◽  
The Russian Federation ◽  
Domestic Practice

Th is article is devoted to peculiarities and contradictions of introduction of international standards into domestic practice of auditing. Th e article deals with the peculiarities of identifi cation of the international practice of auditing in the Russian Federation, as well as the integration of international standards of auditing activities in its jurisdiction.

Prediction of durability of structural concrete in aggressive exposures

2018 ◽  
Author(s):  
Сергей Леонович ◽  
Sergey Leonovich ◽  
Валентин Доркин ◽  
Valentin Dorkin ◽  
Оксана Чернякевич ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Service Life ◽  
Building Materials ◽  
Limit State ◽  
Concrete Structures ◽  
Life Cycles ◽  
Reinforced Concrete Structures ◽  
Concrete Durability ◽  
Concrete Carbonation ◽  
Corrosion Of Steel

The monograph is devoted to the prediction of the longevity of reinforced concrete structures, the destruction of which is associated with corrosion of steel reinforcement caused by chloride aggression or concrete carbonation. On the basis of a comprehensive analysis of models for calculating the service life of structures and experimental data, preference is given to the mathematical model Dura Crete. Life cycles for the main degradation processes in concrete and reinforcement, periods of initiation and propagation of corrosion are considered. Particular attention is paid to the influence of environmental factors and the quality of concrete on the kinetics of chloride penetration and movement of the carbonization front. Formulated limit state design reinforced concrete durability in chloride attacks and carbonation. The basic provisions of the method of calculating the durability of reinforced concrete structures, based on the use of the reliability coefficient for the service life. The practical assessment of service life of reinforced concrete elements taking into account stochastic processes in concrete and reinforcement is made. Verification of the model reliability is performed. For all those interested in the issues of building materials and processes occurring in them.

Design reinforced concrete structures: Differences in procedure, formula, and results between Eurocode 2 and British Standard 8110

2017 ◽  
Author(s):  
Mustaqqim Abdul Rahim ◽  
Lum Chui Ying ◽  
Shahiron Shahidan ◽  
Zuhayr Md. Ghazaly ◽  
Shamilah Anudai ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
British Standard ◽  
Eurocode 2

scholarly journals Development and current state of the regulation of the natural exposure of the public of the Russian Federation (To commemorate the 90th birthday of Professor Krisiyk E.M.). Part 1

2021 ◽  
Vol 14 (1) ◽  
pp. 34-39
Author(s):  
V. V. Omelchuk
Keyword(s):  
Russian Federation ◽  
Building Materials ◽  
Radiation Safety ◽  
Natural Radionuclides ◽  
Federal State ◽  
Scientific School ◽  
The Public ◽  
Natural Exposure ◽  
The Russian Federation ◽  
Scientific Results

In April 2020 we commemorate the 90th birthday of the major scientist, doctor of technical sciences, Professor Eduard Mechislavovich Krisiyk. A new field of research on radiation-hygienic assessment of the natural sources of ionizing exposure and limitation of the public exposure has been developed under his scientific supervision and personal participation. For the first time in the international practice E.M. Krisiyk as the main author developed the requirements for the concentration of the natural radionuclides in the building materials; as the co-author – in phosphoric fertilizers, indicated the necessity of their radiation control. His scientific results were included into various Russian legislative and methodical documents: Federal state law “On the radiation safety of the public” in 1996, Norms of the radiation safety NRB-96 and NRB-99, Basic sanitary rules on the provision of the radiation safety OSPORB-99, Federal targeted program “Radon”, various guidelines. His scientific school, his flock and followers are successfully developing the scientific-methodical basics of the regulation of the natural exposure of the public of the Russian Federation at the current stage.

Scientific And Technical Support Of Design And Construction Of High-Rise Buildings On The Example Of The Comlex In St. Petersburg

2019 ◽  
pp. 4-11 ◽  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Steel Structures ◽  
Technical Support ◽  
Laminated Glass ◽  
Reinforced Concrete Structures ◽  
Steel Reinforced Concrete ◽  
High Rise ◽  
Domestic Practice ◽  
Design And Construction

The problems considered within the frame of scientific and technical support are shown on the example of design and construction of a unique high-rise building of "Lakhta Center" in St. Petersburg. The main results of design support and construction of steel, steel-reinforced concrete structures, as well as structures made of laminated glass are presented. The main reason for atypical design and technological solutions for steel structures are thickness of rolled steel and the material of structures non-standard for domestic practice. In addition, there was no normative approach to the design of steel-reinforced concrete structures and structures made of laminated glass at the time of design of the complex. The tests carried out within the scientific and technical support provided the necessary information for the design of unique structures. It is required to develop the set of rules defining the requirements for scientific research when constructing unique objects for a more orderly scientific and technical support and justification of the amount of work performed.

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