Studies on Deflections of Reinforced Concrete Beams

Abstract

In engineering structures that are susceptible to service loads, deflection is an essential design parameter. Many studies were conducted to compute the effects of short-term and long-term deflection in reinforced concrete beams with different parameters. Many of the researchers recommended the procedures and control of the deflection in various methods. From those approaches, here the present study was conducted with different methods which are proposed by Branson (1965), Bischoff and Scanlon (2007), and ACI 318, IS 456 different codes also given the expressions to compute the effective moment of inertia for compare the deflection estimates from those methods and to calculate the deflection values of reinforced concrete beams.

Furthermore, the study was conducted with two different type conditions i.e., change in depth and depth in constant by designed and practical assumption cases with three different conditions of reinforcement have been investigated in each of the three different beam dimensions. One-third of the beam had only tensile steel i.e., No compression steel, one-third had tensile plus and the same amount of compressive steel i.e., Half compression steel, and one-third had tensile steel plus one-half as much compressive steel i.e., Full compression steel. A comparative analysis was carried out for analytical and numerical studies.