Abstract
It is reasonable to design H-shaped steel beams in consideration of lateral buckling behavior. In this report, it is performed to calculate numerically the elastic lateral buckling strength of simply supported H-shaped steel beams subjected to end moments and uniformly distributed load, by means of finite difference method. Analyses are composed of two parts. The one is for non-restraint beams and the other is for the beams of which lateral deflections along their upper flanges are perfectly prevented taking the effect of the slab into consideration. In the case of the non-restraint beams lateral buckling strength is very much affected by their section properties. When uniformly distributed load does not exist, a value for modification factor for lateral buckling load is obtained which is similar to the results obtained by other researchers. In the case of the restraint beams, design formula is proposed for JIS type H-shaped beams.
