Voskobiinyk O. Probabilistic analysis of structural behaviour of compressed concrete filled steel tubes members

Subject - compressed cconcrete filled steel tubes (CFST) members; object - develop methods of estimation of design reliability indexes of the compressed CFST members and give offers for calculation such members at designing CFST structures with provision for factors of reliability; Procedures - the experimental methods of study of strain-deformed state, methods of building mechanical, mathematical statistics, theories to probability and reliability; Theoretical results - the methods of analysis of concrete core macrostructure by analysis of the irregularity properties long CFST along the height was for the first time applied; probabilistic analysis of structural behaviour of compressed CFST members and results of their experimental researches were significant developed; the generalized statistical data about variability of efficiency indexes were received; method of design reliability estimations of stub axial compressed CFST has got the most further development; dependencies between probabilistic-costparameters of stub axial compressed CFST members are for the first time received; the results are the following: the method of the estimation of design reliability indexes of compressed CFST members has been offered; offers for calculation of stub axial compressed CFST and recommendations concerning indication of their optimal cross-section parameters taking into consideration providing of maximal level of design reliability at decrease of their cost have been given; branch: constructional engineering.