Shear strength of reinforced concrete T-beams without stirrups

This paper presents the test results of experimental study on shear strength of reinforced concrete beams without stirrups. the test variables in this study were type of beam cross section and ratio of longitudinal reinforcement. six simple supported beams,consisting of three beams with rectangular cross section and three beams with t section,subjected to two point load were tested until failure. during the test,the values of the diagonal crack load and the maximum load were observed as well as the deformation of the beams. existing empirical equations for shear strength of concrete presented in the literature and design codes were used and then compared to that value obtained from the test. comparison between test results and theoretical shear capacity show that all of equations conservatively estimate the occurrence of shear failure with the values of the test results 10 to 90% higher than the theoretical values. it was confirmed from the test that the shear capacity of t-beams were higher than for rectangular beams,with the values ranging from 5 to 25%,depending on the ratio of longitudinal reinforcement. also,it was observed that ratio of longitudinal reinforcement influences the shear capacity of the beam as well as the angle of diagonal shear crack. in addition,based on the test results,a simple model for predicting the contribution of flange to shear capacity in t-beam was presented. © school of engineering,taylor’s university.