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Our previous research clarified the relation between the lateral buckling strength of H-shaped beams and the demands of the lateral and rotational rigidity for continuous braces when a beam is subjected to uniform moment. To consider more realistic conditions, this paper takes the effect of moment gradient along beams into account on the elastic lateral buckling strength of H-shaped beams with continuous braces. In this paper, the elastic buckling strength of the beams under moment gradient is estimated by formulating energy conservation equations, which are verified by eigenvalue analysis. Finally, the elasto-plastic lateral buckling moment of the beams is evaluated using the modified slenderness ratio with the elastic lateral buckling strength.

EFFECT OF LATERAL-ROTATIONAL RESTRAINT OF CONTINUOUS BRACES ON LATERAL BUCKLING STRENGTH FOR H-SHAPED BEAMS WITH FLEXURAL MOMENT GRADIENT