Published since 1923
DOI: 10.33622/0869-7019
Russian Science Citation Index (RSCI) на платформе Web of Science


  • BUILDING MATERIALS AND PRODUCTS
  • Improvement Of Curvilinear Diagrams Of Concrete Deformation
  • UDC 691.3:539.3 DOI: 10.33622/0869-7019.2019.08.99-104
    Igor M. BEZGODOV, e-màil: bezgodovim@mgsu.ru
    Elena N. DMITRENKO, e-màil: dmitrenkoen@mgsu.ru
    Moscow State University of Civil Engineering (National Research University), Yaroslavskoe shosse, 26, Moscow 129337, Russian Federation
    Abstract. Problems when calculating reinforced concrete structures based on the concrete deformation under compression diagram, which is presented both in Russian and foreign regulatory documents on the design of concrete and reinforced concrete structures are considered. The correctness of their compliance for all classes of concrete remains very approximate, especially a significant difference occurs when using Euronorm due to the different shape and sizes of the samples. At present, there are no methodical recommendations for determining the ultimate relative deformations of concrete under axial compression and the construction of curvilinear deformation diagrams, which leads to limited experimental data and, as a result, does not make it possible to enter more detailed ultimate strain values into domestic standards. The results of experimental studies to determine the ultimate relative deformations of concrete under compression for different classes of concrete, which allowed to make analytical dependences for the evaluation of the ultimate relative deformations and description of curvilinear deformation diagrams, are presented. The article discusses various options for using the deformation model to assess the stress-strain state of the structure, it is concluded that it is necessary to use not only the finite values of the ultimate deformations, but also their intermediate values. This requires reliable diagrams "s-e" for all classes of concrete. The difficulties of measuring deformations in concrete subjected to peak load, corresponding to the prismatic strength, as well as main cracks that appeared under conditions of long-term step loading are highlighted. Variants of more accurate measurements are proposed. Development and implementation of the new standard GOST "Concretes. Methods for determination of complete diagrams" on the basis of the developed method for obtaining complete diagrams of concrete deformation under compression for the evaluation of ultimate deformability of concrete under compression are necessary.
    Key words: prismatic strength, modulus of elasticity, class of concrete, concrete deformation diagram, ultimate relative deformation.
  • REFERENCES
    1. Panfilov D. A., Pishchulev A. A., Gimadetdinov K. I. Review of diagrams of concrete deformation under compression in national and foreign concrete codes. Promyshlennoe i grazhdanskoe stroitel'stvo, 2014, no. 3, pp. 80-84. (In Russian).
    2. Bezgodov I. M. On the question of the conformity of the methods for determining the physicomechanical characteristics of concrete in the Russian and European standards. Beton i zhelezobeton, 2013, no. 4, pp. 5-8. (In Russian).
    3. Bezgodov I. M. To the question of estimating the ultimate relative deformation of concrete under compression for various classes of concrete. Beton i zhelezobeton, 2015, no. 5, pp. 9-11. (In Russian).
    4. Bezgodov I. M., Levchenko P. Yu. On the issue of the method of obtaining complete diagrams of concrete deformation. Tekhnologii betonov, 2013, no. 10, pp. 34-36. (In Russian).
    5. Bezgodov I. M., Dmitrenko E. N., Mitrohina A. O., Bazhenova A. V. The effect of short-term overload on the physico-mechanical characteristics of concrete under repeated loading. Beton i zhelezobeton, 2015, no. 2, pp. 2-4. (In Russian).
    6. Bezgodov I. M., Pahratdinov A. A., Tkach E. V. Physico-mechanical characteristics of concrete on crushed stone from crushed concrete. Vestnik MGSU, 2016, no. 10, pp. 24-34. (In Russian).
    7. Mkrtchyan A. M., Aksenov V. N. Analytical description of the deformation diagram of high-strength concrete. Inzhenernyj vestnik Dona, 2013, no. 3. Available at: http://www.ivdon.ru/magazine/archive/n3y2013/1818 (accessed 20.03.2019). (In Russian).
    8. Krol' I. S. Empirical representation of concrete compression diagram. Issledovaniya v oblasti mekhanicheskih izmerenij: sb. nauchn. tr. [Reasearch in the field of mehanical measurements]. Moscow, VNIIFTRI Publ., 1971, vol. 8(38), pp. 306-326. (In Russian).
    9. Radaykin O. V. To the construction of concrete deformation diagrams under uniaxial short-term tension / compression using the deformation criterion of damage. Stroitel'nye konstrukzii, 2017, no. 6, pp. 71-73. (In Russian).
    10. Rahmanov V. A., Safonov A. A. Development of experimental methods for evaluating concrete deformation diagrams in compression. Stroitel'nye nauki, 2017, no. 3, pp. 120-121. (In Russian).
    11. Nikulin A. I. On the determination of the ultimate relative deformation of concrete in the stretched zone of a bent reinforced concrete element. Sovremennye problemy nauki i obrazovaniya, 2014, no. 6, pp. 65-69. (In Russian).
    12. Cusson D., Paultre P. Stress-strain model for confined high-strength concrete. Journal of Structural Engineering, 1995, vol. 121, pp. 468-477.
    13. Rimshin V. I., Krishan A. L., Muhametzyanov A. I. Construction of deformation diagrams of uniaxially compressed concrete. Vestnik MGSU, 2015, no. 6, pp. 23-31. (In Russian).
    14. Karpenko N. I., Eryshev V. A., Latysheva E. V. Method of calculating the parameters of concrete deformation during unloading from compression stresses. Vestnik MGSU, 2014, no. 3, pp. 168-172. (In Russian).
    15. Karpenko N. I., Sokolov B. S., Radaykin O. V. Analysis and enhancement of curvilinear diagrams of concrete deformations for calculation of reinforced concrete structures on the basis of a deformation model. Promyshlennoe i grazhdanskoe stroitel'stvo, 2013, no. 1, pp. 28-30. (In Russian).
    16. Gushcha Yu. L., Laricheva I. Yu. Coefficients of prism strength of ordinary heavy and fine-grained concrete. Beton i zhelezobeton, 1984, no. 8, pp. 37-38. (In Russian).
    17. Mihajlov V. V., Emel'yanov M. P., Dudoladov L. S., Mitasov V. M. Some proposals on the description of concrete deformation diagrams when loaded. Izvestiya vuzov. Stroitel'stvo i arhitektura, 1984, no. 2, pp. 23-27. (In Russian).
    18. Yashin A. V. Some data on deformations and structural changes of concrete under axial compression. Novoe o prochnosti zhelezobetona [New about the strength of reinforced concrete]. Moscow, Strojizdat Publ., 1977, pp. 17-30. (In Russian).
  • For citation: Bezgodov I. M., Dmitrenko E. N. Improvement of Curvilinear Diagrams of Concrete Deformation. Promyshlennoe i grazhdanskoe stroitel'stvo [Industrial and Civil Engineering], 2019, no. 8, pp. 99-104. (In Russian). DOI: 10.33622/0869-7019.2019.08.99-104.

BACK