THE COEFFICIENT OF WORKING CONDITIONS IS AN IMPORTANT FACTOR OF THE LIMIT STATES METHOD

Abstract

In the method of calculating structures according to limit states, the coefficient of working conditions must take into account all the features of the work and operation of structures, which are not explicitly taken into account by other coefficients of the method. This coefficient covers all the inaccuracies of the calculation model, which arise as a result of its simplification and idealization. The initial values of the working conditions coefficients were included in the first limit state design codes. In subsequent editions of the codes, the scale of these coefficients was regularly reviewed and supplemented. Probabilistic aspects of substantiating the coefficients of the working conditions of structures of various purposes were developed by researchers of the building structures reliability. The substantiation of the calculated coefficients of the limit state method, in particular the coefficient of working conditions, was in the field of view of leading foreign researchers of reliability. A significant contribution to the interpretation of the constructive correction as an experimental analog of the coefficient of working conditions was achieved by full-scale tests of steel structures of industrial buildings. The analysis of the reliability of compressed-bent elements and statically uncertain systems determined the additional coefficients of the working conditions.