Abstract
Elasto-plastic and collapse behavior of structural steel beam-columns with H-cross section subjected to repeated variable bending around the strong axis under a constant axial force are analytically and unifiedly investigated. A new method, its basic ideas and fundamental formulation are given in the authors' previous papers, is applied to a beam-column with H-cross section under repeated variable bending, and the explicit expressions for the elasto-plastic behavior are derived. Several specific characteristics of the H-cross section are indicated in comparison with the rectangular one. Also, the incremental collapse limits, which are related to divergence phenomenon of the axial strain, are examined.
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