Implications of loss of stability of deformation sequences of reinforced concrete sections

• Autorzy: Szota M. , Rychlik A. , Milewski L. , Dobrzańska-Danikiewicz A. D.

Identyfikatory

DOI

10.5604/01.3001.0054.2811

• Języki publikacji: EN

Abstrakty

EN

Purpose The paper analyses the strain of reinforced concrete sections of flexural and eccentrically compressed sections up to and including failure. Design/methodology/approach The paper shows that taking into account realistic σ-ε diagrams for concrete, which should be considered curves with descending branches, it is possible to determine the state of exhaustion of the load-bearing capacity of the section without the need to introduce the limiting strain εcu assigned only to the concrete class. Findings It was pointed out that the physical law σ-ε describing the behaviour of concrete should include the range of material weakening, expressed by the falling branch in the physical law. Research limitations/implications It was proposed to study the stability of the deformation process of the compressive zone of concrete and the entire critical section based on Drucker's postulate and, on such a basis, to infer the nature of reinforced concrete strain states - the state of exhaustion of load-bearing capacity incipient destruction. Practical implications The formulation of the bearing capacity problem is then complete because there is no need to introduce an apriori limit strain value εcu to determine the bearing capacity. Originality/value It is shown that it is furthermore possible to distinguish a certain covering condition, occurring after the load-bearing condition is reached, in which the process of rapid, avalanche-like destruction begins. The deformation accompanying the state can be considered as the failure deformation of the reinforced concrete section, ect.

Słowa kluczowe

EN

construction; bearing capacity; failure of reinforced concrete sections; material weakness; material stability; Drucker's postulate; safety and health protection

PL

budownictwo; nośność przekrojów żelbetowych; przekroje żelbetowe; stabilność materiału; postulat Druckera; bezpieczeństwo i ochrona zdrowia

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2023
• Tom: Vol. 121, nr 1
• Strony: 69--76
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Szota M.

• Institute of Safety Engineering, Fire Academy, ul. Słowackiego 52/54, 01-629 Warszawa, Poland

• https://orcid.org/0000-0002-8147-1052

autor

Rychlik A.

• Institute of Safety Engineering of Anthropogenic Objects, Construction Expertise Centre, ul. Obozowa 82A/19, 01-434 Warszawa, Poland

• https://orcid.org/0009-0002-2073-0919+

autor

Milewski L.

• Helena Chodkowska University of Technology and Commerce, ul. Jutrzenki 135, 00-231 Warszawa, Poland

• https://orcid.org/0000-0002-3742-5198

autor

Dobrzańska-Danikiewicz A. D.

• Department of Mechanical Engineering, University of Zielona Góra, ul. Prof. Z. Szafrana 4, 65-516 Zielona Góra, Poland

• https://orcid.org/0000-0001-7335-5759

Bibliografia

• [1] A. Baryłka, Effort of the protective structure of the shelter under the influence of an external fire, Archive of Mechanical Engineering 68/2 (2021) 183-193. DOI: https://doi.org/10.24425/ame.2021.137047
• [2] A. Baryłka, D. Tomaszewicz, Anchorages bonded system in experimental research and their comparison with FEM models, Journal of Achievements in Materials and Manufacturing Engineering 106/2 (2021) 49-55. DOI: https://doi.org/10.5604/01.3001.0015.2417
• [3] A. Baryłka, D. Tomaszewicz, Relationship of the interaction load capacity of anchors on their number and anchoring system, Archives of Materials Science and Engineering 112/2 (2021) 55-62. DOI: https://doi.org/10.5604/01.3001.0015.6286
• [4] D. Tomaszewicz, A. Baryłka, Influence of measuring deviations of the components of layered walls on their durability, Safety Engineering of Anthropogenic Objects 3 (2020) 155-162. DOI: https://doi.org/10.37105/iboa.75
• [5] P. Bieranowski, A. Baryłka, Non-dimensional method of capacity limit states for the assessment of the safety level in the structures of large panel buildings, Safety Engineering of Anthropogenic Objects 1 (2021) 42-47. DOI: https://doi.org/10.37105/iboa.104
• [6] M. Owczarek, A. Baryłka, Estimation of thermal diffusivity of building elements based on temperaturę measurement for periodically changing boundary conditions, Energy Market 5/144 (2019) 55-59.
• [7] W. Olszak, Theory of plasticity, PWN, Warszawa, 1961 (in Polish).
• [8] J. Deja (ed), Concrete Technologies and Research Methods, Cement Producers Association, Kraków, 2020 (in Polish).
• [9] F. Levi, G. Pizzetti, Creep, plasticity, prestressing, Dunod, Paris, 1951 (in French).
• [10] D.C. Drucker, A Definition of Stable Inelastic Material, Journal of Applied Mechanics 26/1 (1959) 101-106. DOI: https://doi.org/10.1115/1.4011929
• [11] Comite Euro-Internacional du Beton, CEB-FIP: Model Code for Concrete Structures, Thomas Telford Services LTD, London, 1990.