An innovative beam element with section components cohesive interaction for reinforced concrete frames

The behavior of a Timoshenko concrete beam reinforced by ribbed steel rebars is a function of the cohesive interaction between the concrete and reinforcement provided via bond-slip or traction-separation law. Bond-slip interactions between top/bottom reinforcements and the concrete beam section considering the shear deformations have been studied in this paper in static loading and nonlinear material and geometry conditions.

In this regard, the hybrid beam element has been enriched with two additional interactive degrees of freedom which incorporate the constituted freedom of the top and bottom unions of compressive and tensile reinforcements.

For this purpose, a two-dimensional mesh of the section is added as considered in the multi-fiber and multiscale approaches to non-homogeneous materials simulation whereas, several benefits are provided among which are non-prismatic reinforced concrete beam analysis, arbitrary composite beam section architecture, processing damage, and tracking cracks through the beam section and accordingly through the length of the beam, Fiber Reinforced Polymer reinforcement and wrapping laminates analysis and design, considering prestressing beam sections and many other advantages.