Stability and Load Bearing Capacity of a Bars with Built up Cross Section and Elastic Supports / Badania Stateczności I Nosności Prętów Złożonych Z Podporami Sprężystymi

The present paper is devoted to the numerical analysis and experimental tests of compressed bars with built-up cross section which are commonly used as a top chord roof trusses. significant impact on carrying capacity for that kind elements in case out-of-plane buckling appropriate choice battens provide interaction between separate members. Linear results nonlinear static results, material geometrical nonlinearity, presented bar was truss made reality. Diagonals verticals supports marginal joints were replaced by elastic supports. threshold stiffness (minimum stiffness) intermediate ensures maximum load appointed beam shell model structure. magnitude limit depended length calculated models initial geometric imperfections. axially builtup support presented.