抄録
Basic equilibrium equations were derived to calculate numerically the buckling strength of H-section beams under various kind of restraints. These equations, being equivalent to the classical differential equations on the problem, take more intuitively comprehensive expressions than the classical does, and allow easy application to complicated buckling problem. Based on the equations, the buckling strength of beams under restraints exerted by slabs resting on the beam was analyzed under the loading of the couple of bending moments about strong axis at the both ends of the beam. It was clarified that the torsional restraint due to the flexural rigidity of the slab can enhance considerably the buckling strength. Numerical results were summarized in simple formulae with which the influence of the flexural rigidity of the slab on the buckling strength can be readily estimated.
