Strength of Reinforced Concrete Beams Partly Curved in Elevation Ramakrishnan S.*, Arunachalam N.** *Assistant Professor, Bannari Amman Institute of Technology, Sathyamangalam, Tamilnadu, India **Professor and Dean, Bannari Amman Institute of Technology, Sathyamangalam, Tamilnadu, India Online published on 9 November, 2016. Abstract A beam is said to be partly curved in elevation if a portion in the middle is curved like an arch. In this investigation, twenty one reinforced concrete beams partly and parabolically curved in elevation (PPCE) were cast with parabolic arch portion of three different rises and various chord lengths. PPCE beams were tested by arresting longitudinal displacement using tie bars. These beams were subjected to gradually increased central concentrated load until collapse occurred. The first crack loads and ultimate loads have been recorded. PPCE beams have been compared with straight beams in relation to strength and behavior. Theoretical analysis for first cracking load and ultimate load of straight beam has been made. Based on the experimental results and strength of straight beam, theories have been developed for predicting the first cracking load and ultimate load of PPCE beams. This research work is first of its kind in the world. Top Keywords Beams partly curved in elevation, PPCE beams, tie bars, arch action, arch portion, RC beams. Top |