Abstract:
A deep beam is a beam with a small ratio of its shear
span to its effective depth. Deep beams at failure under shear
II. FINITE ELEMENT MODELING
mechanism behave as brittle in contrast to the normal beams
which become ductile under the flexural mechanism. The shear
failure of deeps beams can be prevented by providing a sufficient
amount of web shear reinforcements. Providing horizontal web
reinforcement to the RC deep beams is a way to increase their
capacity to shear. Testing of the studied deep beams was
performed by Finite Element Method (FEM) modeling with the
aid of ANSYS software. To obtain valid parameters for modeling
RC deep beams in FEM modeling, calibrating test have to be
done through verification and validation processes. The study
results of all studied RC deep beams show that by closing up the
spacing between the horizontal web reinforcement results in
increment in the ultimate load, while the ultimate deflection and
the curvature ductility were found to be decreasing. For RC deep
beams, the placing configuration of horizontal web reinforcement
at 0.5h-0.7h was found to be efficient for gaining higher values of
ultimate deflection and curvature ductility compared to the
placing configuration at 0.3h-0.5h with similar values of ultimate
load. It was also found that all the specimens’ crack patterns at
the first crack state were caused by flexural-tension while at the
ultimate state, they were caused by the shear mechanism.
