Urbaniak, MariuszKubiak, Tomasz2020-12-172020-12-172011Mechanics and Mechanical Engineering, Vol. 15, No. 2, 2011, s. 133-1481428-1511http://hdl.handle.net/11652/3121This paper deals with local dynamic buckling of thin-walled girder segments (short beam-columns) subjected to bending. Various shapes of pulse loading (triangle, trapezoid and rectangle) with a duration corresponding to the fundamental period of vibration were taken into account. Assumed boundary conditions correspond to a simple support, this agrees with conditions that exist in the place of the diaphragm in a long spar. The problem was solved by finite element method. In order to determine the critical load pulse amplitudes Volmir, Budiansky-Hutchinson, Ari-Gur and Simonetta criteria were employed.enthin-walled structuresdynamic bucklingpulse loadingC-shape girderskonstrukcje cienkościennewyboczenie dynamiczneobciążenie impulsowedźwigary w kształcie litery Cartykuł