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9.6. CONCENTRICALLY BRACED
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FRAME WITH HIGH DUCTILITY LEVEL
Concentrically braced steel frames of high ductility level are dimensioned in such a way that no significant loss of strength occurs in the structural system, even if some of the braced members under compression are buckled. The rules to be applied in the dimensioning of these systems are given below:
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9.6.3.4 - The rupture strength is calculated using the effective net area of the brace, while the yield strength is calculated using the gross area of the brace and Rt Fu Ae shall not be less than the Ry Fy Ag. If this condition is not met, the net area cross-section will be reinforced by considering the following conditions:
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(b) Connection detail of stiffeners to brace shall be dimensioned under the effect of axial force computed by Ry Fy Afb / 1.5 (GKT) or Ry Fy Afb (YDKT).