k_1 factor for L/d ratios for reinforced concrete T- and L-beams

摘要

Deemed to comply span-to-depth ratios offer a simple alternative to checking the deflections of reinforced concrete beams. Inherent in determining the allowable span-to-depth ratio is an estimate of the effective second moment of area I_(ef) In AS 3600-2001 a simple approximation is provided for rectangular beam cross-sections using the factor k_1. However, no such approximation is provided for T- and L-beam cross-sections. This paper provides the background to the development of equations for k_1 to facilitate the routine design of reinforced concrete T- and L-beams.