Estimation of Stability of Central Compressed Rods of Structural Coatings Taking into Account Structural Features of Knot Connections and Nonlinear Work of Material
Journal Title: Металлические конструкции - Year 2018, Vol 24, Issue 3
Abstract
The paper presents the analysis of the stability of centrally compressed rods, taking into account the structural features of the node joints for which the models of volume finite element rods are made, the analysis of the stress-strain state of 6 standard sizes of tubular elements according to GOST 10704-91 «Electrically welded steel welded pipes» (in the range from 1144 to 15912 mm) in the software package of the LIRA-CAD family. The calculation is performed in a physically nonlinear setting in the elasto-plastic stage of the material. In the analysis of stability, the stability factor was analyzed from the results of nonlinear calculation (kf.s). Refined values of the critical force (Ncr, e.p.s) are presented. The obtained data were compared with the values of the critical force determined by DBN B.2.6-198:2014 «Steel structures» (Ncr, DBN). With the help of multiple linear regression, a generalized approximating relationship between significant factors influencing the refined value of the critical force (Ncr) and the value of the total deviation (ypr+ymax/l) is established in the Microsoft Excel program.
Authors and Affiliations
Yevgen Gorokhov, Anton Tanasoglo, Alexander Mushchanov
Keywords
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