Analysis of the influence of structural features of nodal connections on the load-carrying capacity of centrally compressed rods of structural coatings
Journal Title: Металлические конструкции - Year 2017, Vol 23, Issue 3
Abstract
The article presents the analysis of the stability of centrally compressed rods with initial geometric imperfections, performed with the help of volumetric finite element modeling of rods taking into account the design features of nodal connections. The analysis of 5 standard sizes of tubular elements in accordance with GOST 10704-91 «Electrically welded steel welded pipes» (in the range from 48.03.0 to 102.03.5 mm) in the software package of the family LIRA-CAD. The calculation is performed in a geometrically nonlinear setting in the elastic stage of the material. In the analysis of stability, the stability factors of stability are analyzed from the results of nonlinear calculation (ky, np) and in the direct analysis of stability (ky). Refined values of the critical force from the nonlinear calculation data (Ncr, NR) and from the stability analysis (Ncr, A) are presented. The obtained data were compared with the values of the critical force, determined from DBN V.2.6-198: 2014 «Steel structures» (Ncr, DBN) and Euler critical force (Ncr, E). With the help of multiple linear regression, Microsoft Excel has established a generalized approximating relationship between the significant factors affecting the refined value of the critical force (Ncr).
Authors and Affiliations
Yevgen Gorokhov, Alexander Mushchanov
Keywords
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