Closure to 'Tension Stiffening in Lightly Reinforced Concrete Slabs' by R. Ian Gilbert

摘要

The writer thanks the writers of all three discussions for their comments and interest in the paper. Professor Bischoff has provided a useful background to the derivation of his equation for the effective moment of inertia of a cracked reinforced concrete member and, in doing so, has provided a convincing explanation of the deficiencies of Branson's equation for members with small reinforcement ratios. The writer supports the recommendation to replace Branson's equation with Bischoff's equation for I_e in future editions of ACI 318.