Theory of Elastic Analysis-Illusion and Superstition

Abstract

This paper argues that the theory of elastic analysis can provide reliable estimates of strength required at all critical points of reinforced concrete structures. Discrepancies between estimated and "actual" design forces may exceed 25% of the estimated values, but flexurally ductile concrete members will deform inelastically to accommodate required loading without rupture. Discrepancies between estimated and "actual" service load forces generally will not be large enough to reveal undesirable cracking. Additionally, the theory of elastic analysis offers the least complex technique to be used for the various load combinations required for designing members that resist combined load cases on frames that sway.