About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Sergey Borisovich Krylov, Doctor of Technical Sciences, Academician of RAACS, research Institute of Concrete and Reinforced Concrete (NIIZHB) named after A.A. Gvozdev JSC “Research Center of Construction”, Moscow, Russian Federation Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0009-0006-5633-399Х Arleninov Petr Dmitrievich, Candidate of Technical Sciences, research Institute of Concrete and Reinforced Concrete (NIIZHB) named after A.A. Gvozdev JSC “Research Center of Construction”, Moscow, Russian Federation Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCOD: 0000-0003-4737-1549 |
| Title of the article | Nonlinear Deformation Model. Its Advantages and Disadvantages in Calculating the Strength of Reinforced Concrete Structures |
| Abstract. | Problem statement. Strength calculations in design are the most important aspect of the construction industry as a whole. The method of calculating strength based on limit forces is currently acceptable, but not the main one. In accordance with the current code of rules SP 63.13330, the main method is to calculate the strength of reinforced concrete structures based on a nonlinear deformation model. It is assumed that this method is theoretically accurate, but in reality, its theoretical accuracy has not been proven. The purpose of the work is to evaluate the accuracy of both methods. The studies were carried out numerically using the finite element method. The objectives of the study are to build high-precision numerical models, compare the calculation results based on a nonlinear deformation model and based on the method of limit forces with each other and with the results of numerical modeling. Results. In the course of the performed research, it was shown that the calculation using a nonlinear deformation model is not theoretically accurate. Its accuracy almost coincides with the accuracy of the calculation of the limit forces. For short-term loads the difference in the results obtained by both methods does not exceed 2%. However, this calculation method requires programming skills from an engineer and is extremely sensitive to the algorithms used. The largest margin of error compared to the true strength of the sections turned out to be the same for both methods and was equal to 21%. Conclusions. It is shown that the main reason for the insufficient theoretical accuracy of the calculation method based on a nonlinear deformation model is serious violations of the law of flat sections in reinforced concrete beams and columns in the limiting state. In terms of accuracy, it does not exceed the calculation method of limit forces. The status of both methods must be equalized in regulatory documents. This will allow, without compromising accuracy, to significantly reduce the time required to perform some parts of the calculations, using the method of limit forces as the main one. |
| Keywords. | method of limit forces, nonlinear deformation model, reinforced concrete, strength |
| For citations: | Krylov S.B., Arleninov P.D. Nonlinear Deformation Model. Its advantages and disadvantages in calculating the strength of reinforced concrete structures // News of KSUAE, 2025, № 2(72), p. 124-132, DOI: 10.48612/NewsKSUAE/72.11, EDN: GWHFAZ |
