Calculation of the crack resistance of reinforced concrete elements with allowance for the levels of normal crack formation

Vasyl Romashko,Olena Romashko,G Vatulia,A Plugin,O Darenskyi

doi:10.1051/matecconf/201823002028

Vasyl Romashko, Olena Romashko + Show 3 more

Open Access

https://doi.org/10.1051/matecconf/201823002028

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Abstract

The separate experimental investigations results and the major drawbacks of existing methods of calculating the reinforced concrete elements crack resistance are considered in detail, taking into account the process of multilevel formation and crack opening. Based on the basic provisions of the deformation and strength model of concrete and reinforced concrete resistance, an engineering method for calculating the formation and disclosure of normal cracks in the reinforced concrete elements and structures at the operational stages of their deformation is proposed. It is implemented on the system of generally accepted static, geometric and physical relations of a deformed solid mechanics. The simplicity of the proposed calculation method is due to the use of the nonlinear function of the average stresses of the reinforcement bond with concrete on the sections of the reinforced concrete element between adjacent cracks. The main advantages of the developed calculation method in comparison with others are outlined.

Highlights

The issues of crack resistance of reinforced concrete elements in the theory of concrete and reinforced concrete have always been and still remain one of the defining
The simplicity of the proposed calculation method is due to the use of the nonlinear function of the average stresses of the reinforcement bond with concrete on the sections of the reinforced concrete element between adjacent cracks
Since the process of crack formation and detection in reinforced concrete leads to violation of its continuity, the evaluation of the stress strain state of reinforced concrete elements tends to be associated with the basic provisions of the destruction mechanics

Summary

Introduction

The issues of crack resistance of reinforced concrete elements in the theory of concrete and reinforced concrete have always been and still remain one of the defining. It is connected, first of all, with the need to assess the actual stress-strain state of these elements in the operational stages. First of all, with the need to assess the actual stress-strain state of these elements in the operational stages Describing this state is extremely difficult, since the length of the individual blocks, into which the reinforced concrete element is successively divided during the cracks formation, is variable and depends on many factors.

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Conclusion