... k c ( θ ) ∙ f c k ∙ r   d r   d φ . Figure 2 Cross section of a circular column and section through the center By the introduction of the mean strength reduction factor k c , m the axial resistance writes to (5) n R c , θ = 2...

... columns. Fire resistance predictions from the proposed equation are in good agreement with those obtained from fire tests and nonlinear finite element analysis. Fire resistance computer program reinforced concrete columns circular columns design equation Lie T. T., Woolerton J.L...