Abstract: (33404 Views)
A parametric study is performed to assess the influence of the tension reinforcement
index, ( ω = ρ fy /f Bc), and the bending moment distribution (loading type) on the ultimate
deformation characteristics of reinforced concrete (RC) beams. The analytical results for 15 simply
supported beams with different amounts of tension reinforcement ratio under three different loading
conditions are presented and compared with the predictions of the various formulations and the
experimental data, where available. The plastic hinge rotation capacity increases as the loading is
changed from the concentrated load at the middle to the third-point loading, and it is a maximum
for the case of the uniformly distributed load. The effect of the loading type on the plastic rotation
capacity of the heavily reinforced beams is not as significant as that for the lightly reinforced beams.
Based on the analytical results obtained using the nonlinear finite element method, new simple
equations as a function of the tension reinforcement index, ω, and the loading type are proposed.
The analytical results indicate that the proposed equations can be used for analysis of ultimate
capacity and the associated deformations of RC beams with sufficient accuracy.
Type of Study:
Research Paper |