Discussion of 'Reevaluation of Deflection Prediction for Concrete Beams Reinforced with Steel and Fiber Reinforced Polymer Bars' by Peter H. Bischoff

摘要

The author has evaluated some of the approaches commonly used to account for tension stiffening in the calculation of the short-term deflection of reinforced concrete flexural members. The most commonly used approach involves the determination of an average effective moment of inertia (I_e) for a cracked member for use in elastic deflection calculations. Several different empirical equations are available for calculating I_e and these are discussed in considerable depth.