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To the problem of determination the crack resistance of reinforced concrete beams made of various types of concrete

Abstract

To the problem of determination the crack resistance of reinforced concrete beams made of various types of concrete

Mailyan D.R., Nesvetaev G.V., Kolleganov N.A.

Incoming article date: 26.12.2022

The method of determining crack-forming forces based on the normative approach is considered. Experimental and theoretical studies of reinforced concrete beams made of ordinary heavy concrete, self-compacting concrete with a modifier and concrete of a frame structure have been carried out. Formulas for determining the tensile strength and flexural strength depending on the compressive strength for each of the considered types of concrete are given. The calculated values of the ultimate extensibility of various concretes determined by various methods are given. Coefficients to the formula linking the reduced and initial elastic modulus of various types of concrete are obtained. The influence of the accuracy of the experimental determination of the moment of cracking on the change in the calculated dependencies is analyzed.

Keywords: cracking moment, flexural and tensile strength, frame structure concrete, self-compacting modified concrete