TY - GEN A1 - Krajewski, Marcin A2 - Kuczyński, Tadeusz - red. PB - Zielona Góra: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego N2 - 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 of the roof trusses. The significant impact on carrying capacity for that kind of elements in case of out-of-plane buckling is appropriate choice of battens which are used to provide interaction between separate members. N2 - Linear buckling analysis results and nonlinear static analysis results, with material and geometrical nonlinearity, are presented for the bar with built-up cross section which was used as the top chord of the truss made in reality. Diagonals and verticals which are supports for the top chord between marginal joints were replaced by the elastic supports. N2 - The threshold stiffness (minimum stiffness) for the intermediate elastic supports which ensures maximum buckling load was appointed for the beam and shell model of the structure. The magnitude of limit load depended on length of the battens was calculated for models with initial geometric imperfections. The experimental tests results for the axially compressed bars with built-up cross section and elastic support are presented. L1 - http://www.zbc.uz.zgora.pl/Content/47392/7_krajewski_stability.pdf L2 - http://www.zbc.uz.zgora.pl/Content/47392 KW - przekrój złożony KW - przewiązka KW - obciążenie krytyczne KW - obciążenie graniczne KW - sztywność podpór KW - built-up cross section KW - batten KW - buckling load KW - limit load KW - support stiffness T1 - Stability and load bearing capacity of a bars with built up cross section and elastic supports = Badania stateczności i nośności prętów złożonych z podporami sprężystymi UR - http://www.zbc.uz.zgora.pl/dlibra/docmetadata?id=47392 ER -