STRENGTH OF H-SHAPED BRACE CONSTRAINED FLEXURAL BUCKLING HAVING UNCONSTRAINED AREA AT BOTH ENDS : Both ends fixed

Abstract

This paper evaluates strength of H-shaped brace constrained flexural buckling by rectangular hollow section steel. The brace has unconstrained area at both fixed-ends. It is assumed that the brace and the steel tube deform continuously. The formulas of strength evaluation are induced using continuous bar model of non-uniform section. The propriety of strength evaluation methods was verified by structural experiments. As a result, it was shown that the collapse mode changes from the bending yield of constraining member to the yield or the local buckling of the brace caused by axial force and additional bending moment at the unconstrained area.