Análise comparativa dos critérios normativos brasileiro, americano e europeu para verificação de deformações em vigas retangulares de concreto armado

Abstract

This work performs a comparative analysis of normative methods for calculating deferred deflections in reinforced concrete beams, crucial for the Serviceability Limit State (SLS). The standards provide significantly different results, with the greatest divergences found in how each code defines the cracking moment, the effective moment of inertia, and the methodology for calculating the deferred deflection itself. Eurocode, in particular, showed an atypical result, where increasing the bottom reinforcement increased the shrinkage deflection.