Analytical Study on Compression Members with Support for Buckling

Elasto-plastic analysis was carried out for the behavior of centrally loaded compression members which have initial deflection expressed by a series of sine waves, and are braced at an arbitrary intermediate point other than the center. A parametric study on the bracing efficiency reveals that the brace increases the ultimate strength, but the efficiency changes depending on the type of initial deformation and the location of the brace, and that if the design expects the strength of a member braced at the center to be equal to the strength P0 the design bracing force may be taken equal to 2% of the ultimate strength, and the required stiffiness ratio of the brace may be 4, but it is very difficult to achieve the ideal buckling strength Pcr of a member separated between the support and the bracing point