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Wyszukujesz frazę "rebar" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Non-uniform corrosion of steel rebar and its influence on reinforced concrete elements` reliability
Autorzy:
Blikharskyy, Yaroslav
Kopiika, Nadiia
Selejdak, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1839520.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
corrosion
steel rebar
material anisotropy
mathematical modeling
korozja
stalowy pręt zbrojeniowy
anizotropia materiałowa
modelowanie matematyczne
Opis:
Remarkable place of reinforced concrete structures in construction field has been noted in wide number of recent researches. Subsequently, their degradation due to aggressive environment has become the topical problem nowadays. Therefore, the formulation of reliable technique for corroded element strength decrement is of great importance, and could be achieved only with the use of complex experimental and theoretical analysis. In this article an attempt is made to propose the mathematical approach to corrosive process modelling, taking into consideration the specifics of its development. According to thorough literature review on existing studies, main specifics of the process were indicated for further suppositions and assumptions formulation. Accordingly, the complex theoretical investigation with corresponding mathematical computations was conducted and results of analytical modelling were discussed. As the initial data for analytical modelling results of previously conducted experiments were used. Analysis of the obtained results shows rather high correspondence with the real conditions of structural element exploitation, taking into consideration material anisotropy and complexity of the corroded zone spread along the rebar cross-section. Proposed methodology for limit force decrease evaluation in general demonstrates reliable results and could be used for further evaluation of corrosion impacts on reinforced concrete elements bearing capacity.
Źródło:
Production Engineering Archives; 2020, 26, 2; 67-72
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stress-strain state of damaged reinforced concrete bended elements at operational load level
Autorzy:
Kopiika, Nadiia
Vegera, Pavlo
Vashkevych, Rostyslav
Blikharskyy, Zinoviy
Powiązania:
https://bibliotekanauki.pl/articles/23967534.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
korozja
pręt stalowy
belki o rzeczywistych wymiarach
uszkodzone belki
corrosion
steel rebar
real size beams
damaged beams
Opis:
Each structure is exposed to different influences during operation. As a result, there are various defects and damages of these elements that affect their safe operation. The article presents the results of experimental studies of reinforced concrete beams with damages to stretched reinforcement made with and without initial load application. As the damages were accepted one or five Ø5.6 mm holes. In one case, the damage was made until the beam destruction (up to the 8.4 mm opening) Control samples of both series were destroyed due to crushing of the compressed zone of concrete. Samples that were damaged without initial loading collapsed due to rupture of the stretched reinforcement. The same type of failure was identified for damages at the operational load level.
Źródło:
Production Engineering Archives; 2021, 27, 4; 242--247
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
  • odwiedzone
Tytuł:
Determination of the optimum percentage of high strength bars in RC beams with combined reinforcement using FEM
Autorzy:
Selejdak, Jacek
Blikharskyy, Yaroslav
Bobalo, Taras
Kopiika, Nadiia
Powiązania:
https://bibliotekanauki.pl/articles/973049.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
deformability
serviceability
combined reinforcement
high-strength rebar
steel plate
belka żelbetowa
beton zbrojony
konstrukcja żelbetowa
odkształcalność
blacha stalowa
FEM
pręt zbrojeniowy
Opis:
In this work on the basis of the developed and tested mathematical model, the numerical experiment is conducted in order to study in more detail the specifics of performance of concrete beams` with combined reinforcement. For this purpose nine series of reinforced concrete beams with different combination of steel bars (A400C, At800, A1000) and ribbon reinforcement (C275) were modeled. In the developed series two classes of concrete were used: C50/60, C35/45. The functions derived on the basis of mathematical modeling allow us to determine the recommended percentage of high-strength reinforcement of common reinforced concrete structures with single reinforcement. Therefore, the possibility is obtained to reduce the total structures` reinforcement percentage, increasing their deformability by the specified value without affecting the bearing capacity.
Źródło:
System Safety : Human - Technical Facility - Environment; 2020, 2, 1; 230-236
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer modelling of RC beams reinforced with high strength rebars and steel plate
Autorzy:
Bobalo, Taras
Blikharskyy, Yaroslav
Krainskyi, Pavlo
Volynets, Myhailo
Powiązania:
https://bibliotekanauki.pl/articles/104114.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
load-carrying ability
deformability
mixed reinforcement
high-strength rebar
external reinforcement
nośność
odkształcalność
mieszane zbrojenie
pręt zbrojeniowy o wysokiej wytrzymałości
wzmocnienie zewnętrzne
Opis:
The use of computers provides the opportunity to analyse and design complex structures, taking into account the geometric and physical nonlinearity of construction materials. In the article the study of stress-strain state of mixed steelconcrete beams, were presented. The results of this study showed that the method of calculation according to designe codes gave satisfactorily results of calculated strength compared with experiments. However, these methodes do not provide complete information of structural performance at all levels of load. For a more complete study of the stress-strain state and the physical nature of the processes occurring in steel-concrete structures reinforced with a mixed reinforcement, the calculation method using "Lira" software complex is proposed. The method of calculation is based on the finite element method. The calculation is made taking into account physical nonlinearity and real diagrams of σ-ε of materials using the nonlinear deformation law №14 of "Lira" software complex. The proposed method of calculation allows to determine the values of bearing capacity, the development of deformations and the beginning of crack formation, as well as stresses at all load levels.
Źródło:
Quality Production Improvement - QPI; 2019, 1, 1; 304-310
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical modelling of stress-strain state of steel-concrete beams with combined reinforcemenent
Autorzy:
Selejdak, Jacek
Bobalo, Taras
Blikharskyy, Yaroslav
Dankevych, Iryna
Powiązania:
https://bibliotekanauki.pl/articles/26081279.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
wzmocnienie łączone
pręty zbrojeniowe o wysokiej wytrzymałości
konstrukcje stalowo-betonowe
projektowanie konstrukcji żelbetowych
wzmocnienie zewnętrzne
combined reinforcement
high-strength rebar
steel-concrete structures
design of RC structures
external reinforcement
Opis:
Most of the modern computer software for the building structures` calculation is based on mathematical dependencies which make it possible to analyse rather complex stress-strain state of structures subjected to loading. As a rule, the calculation is based on the finite element method and is reduced to the calculation of deformations arising in structures due to the action of external forces with the use of real strain diagrams of materials, σ-ε diagrams for concrete and reinforcement. Modern normative regulations for reinforced concrete structures` calculation are also based on the deformation model using material deformation diagrams, which are as close to the real ones, as possible. Therefore, this study was aimed to investigate in more detail the stress-strain state and the physical essence of the processes occurring in reinforced concrete structures with combined reinforcement according to mathematical approaches and regulations of DBN B.2.6-98:2009 and DSTU B. In 2.6-156:2010. Namely, in the research is analysed the combined reinforcement of S245 steel tapes and A1000 rebar, which is used in the production of reinforced concrete elements. The results of mathematical modelling were compared with the calculation results, according to DBN B.2.6-98: 2009 and DSTU B. B 2.6-156:2010, as well as with field experimental data. Therefore, the conclusion could be made, whether it is possible to use this technique with sufficient accuracy to calculate reinforced concrete structures with combined reinforcement.
Źródło:
Production Engineering Archives; 2023, 29, 1; 108--115
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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