Ultimate Strength OFR.C Hollow Beams having Hole above and below the Neutral Axis Arun M*, Arunachalam N** *Assistant Professor, Ph.D. Research Scholar, Department of Civil Engineering, Bannari Amman Institute of Technology, Sathyamangalam, India **Professor & Dean, Civil Engineering, Bannari Amman Institute of Technology, Sathyamangalam, India Online published on 2 August, 2016. Abstract To study the behavior and ultimate strength of reinforced concrete hollow beams, seven reinforced concrete beams were cast and tested by applying gradually increased two point loads. Out of these seven beams one beam was solid beamtested for the purpose of comparison. Six beams were hollow beams which had a longitudinal circular hole either above or below the neutral axis. It was found that, though all the beams had the same type of reinforcements, the strength and behavior of the beams were different in relation to the beam deflection, crack pattern, crack width, ultimate load carrying capacity and failure mode of the beam. The size of the hole and position of the hole were varied in these beams. It was found that the size of hole is the most important parameter that affects the beam behavior. Finally, theoretical analysis has been made for all the tested R.C. hollow beams to estimate the ultimate load carrying capacity of such beams. Top Keywords Experimental Test, Reinforced concrete Beams, Flexural strength, Hollow Beam, Longidutinal circular hole, Structural design. Top |