Applying conditional optimization to determine the allowable loads on flexurally rigid threads

Objective. Development of a methodology for determining the allowable loads on existing structural elements, design model which is flexural-rigid thread, based requirements strength and rigidity due to changed operating conditions structures. Method. This study mathematical modeling problem conditional optimization. The objective function total potential energy deformation thread with some flexural rigidity. In this case, restrictions are imposed strength, rigidity, condition continuity deformations. At same time, achieve goal, provisions materials, as well apparatus integral differential calculation functions one or more variables, were used. Result. An assessment adequacy results obtained using developed was carried out. A numerical experiment performed determine value uniformly distributed load corresponding distribution stresses strains along length finite stiffness given physical geometric parameters. It has been established that discrepancies in values proposed technology commercial computer-aided system LIRA 10.8, implemented generally recognized element method, no than 5%. Conclusion. technique allows setting solving problems ultimate threads, strains, contrast computer simulation systems solve exclusively direct stress-strain state various types can be used at stage inspection large-span coatings reconstruction public buildings engineering