DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

FORECASTING RELIABILITY OF A BUILDING WHILE INVESTIGATING ITS STRESS-STRAIN STATE DYNAMICS

Vestnik MGSU 10/2015
  • Zolina Tat’yana Vladimirovna - 18 Tatishcheva str., Astrakhan, 414000, Russian Federation Candidate of Technical Sciences, Professor, First Vice-rector, 18 Tatishcheva str., Astrakhan, 414000, Russian Federation, .
  • Sadchikov Pavel Nikolaevich - Astrakhan State University of Architecture and Civil Engineering (ASUACE) Candidate of Technical Sciences, Associate Professor, Department of Automated Design and Modeling Systems, Astrakhan State University of Architecture and Civil Engineering (ASUACE), 18 Tatishcheva st., Astrakhan, 414056, Russian Federation.

Pages 20-31

The article presents the results of evaluation and prediction of reliability a building of the ship hull shop of Astrakhan sea plant under the action of complex combination of stresses. Basing on the values of geometric and stiffness characteristics, a computational model of the object of the study was built. The results were obtained in the course of realization of the method of limiting states, taking into account the random character of the current loads and the strength properties of the materials. Their reliability was confirmed by a multiple conduction of the searching algorithm of mathematical expectations and indicators of variations in the calculated parameters of building structures and operating loads. Numerical characteristics were determined by the results of two surveys of natural oscillations of the framework. During the study the authors evaluated stress-strain state of the building of the ship hull shop both taking into account seismic disturbances and their absence. The calculation of the perception of the seismic load was carried with choosing the earthquake model implementation by mapping the impact of the earthquake in the form of a set of random processes with defining spectra of the input and output. The presented results were obtained by the complex automation of calculating integrated indicators. Its components are: safety factor, depreciation rate of structures, reliability index and the residual resource of the framework. When predicting the durability of the research object the correlation dependencies are built in the form of: a fictitious function of generalized load; time function of stress; generalized function of the reserve coefficient; function of working capacity of the carcass structures; function of the reliability index. The developed algorithm for estimating the reliability of an industrial building can be adopted for use as a tool for further research. Its implementation allows accurately tracking the kinetics of the stress-strain state of individual elements and the overall framework of a particular object in the time of operation.

DOI: 10.22227/1997-0935.2015.10.20-31

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