Problems in Providing Equal Reliability of Reinforced Concrete and Steel Constructions Within the Existing Reliability Concept According to EN 1990

ABSTRACT

In accordance with the basic assumptions of the European design standards (Eurocodes), currently in use in the territory of the Republic of Belarus, it is proposed to carry out the design of building structures, made of different materials, belonging to the same reliability class with the same target value of the reliability level (or with the same degree of reliability), expressed in the permissible values of the reliability index or equivalent to it the probability of failure. However, the practical implementation of this idea involves a very large number of problems. The study is devoted to the analysis of reliability levels and equivalent to them probabilities of failure provided by Eurocodes for models of resistance for bending of steel and reinforced concrete elements under rather abstract conditions: the action of self weight and snow load for the reference period of 1 year, however this analysis allows qualitatively highlight the problems, associated with existing approaches in the theory of reliability, and, in general, the problem of ensuring the equal reliability of structures. Within the framework of the study, state functions for calculating the reliability indices of the elements were compiled with the help of using the first-order reliability methods (FORM), and a comparative analysis of these indicators was made. The collection and analysis of probabilistic models of basic variables, used for the compilation of state functions for conventional steel and reinforced concrete elements, was carried out. The data obtained during the research can be useful for further improvement and supplementation of National Annexes and harmonization of Eurocodes. The  conducted research will help to take a closer look at the problem of regulating reliability indicators for building structures made of various materials within the framework of the existing concept of reliability laid down in Eurocode 1990.

Keywords: reliability, steel element, reinforced concrete element, state function, basic variable, model uncertainty, reliability index, target value, Eurocode.

For citation: Tur V., Martynov Yu., Nadolski V., Veryovka F. Problems in Providing Equal Reliability of Reinforced Concrete and Steel Constructions Within the Existing Reliability Concept According to EN 1990. Contemporary Issues of Concrete and Reinforced Concrete: Collected Research Papers. Minsk. Institute BelNIIS. Vol. 10. 2018. Pp. 103–120. https://doi.org/10.23746/2018-10-07

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