Review article

Evaluation of the influence of the maximum deformation value of concrete under compression on the security of the results of calculating the strength of eccentrically compressed reinforced concrete element with a normal cross-section using a NDM

UDC: 

624.071

DOI: 

10.23968/1999-5571-2021-18-6-42-50

Pages: 

42-50

Annotation: 

As a result of calculations in the probabilistic formulation, it is shown that the security of the results of calculating the load-bearing capacity of reinforced concrete elements with symmetric reinforcement under eccentrical compression depends on the eccentricity of the longitudinal force and the quantity of longitudinal reinforcement. To increase the security of the results of calculating the load-bearing capacity of a eccentrically compressed reinforced concrete element with a normal cross-section in the area of small eccentricities, it is proposed to reduce the calculated value of the maximum deformation of concrete under compression. The analysis of the influence of the calculated value of the maximum deformations of concrete under compression on the results of calculating the strength of an eccentrally compressed reinforced concrete element with a normal cross-section has shown that reducing the calculated value of the maximum deformations of concrete under compression by 15% from 2.00% to 1.7% increases the security of the results of calculating the load-bearing capacity in the area of small eccentricities. At the same time, the security of the results of the calculation of the load-bearing capacity at large eccentricities practically does not change. To make a decision on the optimal design value of the maximum concrete deformations under compression, it is necessary to carry out a large amount of experimental studies to specify the characteristics of their statistical distribution.

Authors: 

Popov V. M. Saint Petersburg State University of Architecture and Civil Engineering St. Petersburg, Russia

Pukharenko Yu. V. Saint Petersburg State University of Architecture and Civil Engineering St. Petersburg, Russia

Plyusnin M. G. Kostroma State Agricultural Academy Karavaevo, Kostroma region, Russia

Belov V. V. JSC «Atomenergoproekt» St. Petersburg, Russia

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