Sizeeffect analysisofreinforcedconcretedeepbeams

A finite element failure analysis of reinforced concrete deep beams is perfonned using the Multi Equivalent Series Phase Model and the Enhanced Microplane Concrete Model to simulate experimentally obtained size effects of the deep beams. It is shown that the models can provide good prediction of experimental results of reinforced concrete deep beams on the cracking, shear-compressive failure localization, failure mechanism, deformation, shear strength, and its size effect. The loading boundary condition and the geometrical unsimilarity in beam shape other than in the shear span are shown to have important influence on not only the shear strength but also the failure mode and post-peak behavior. I rNTRODUCTION The specimens are not geometrically similar, but only effective depth and shear span length are similar Comparing with reinforced concrete slender beams, among the three specimens. The finite element mesh fracture and size effect in reinforced concrete deep used in each analysis case is shown in Figures 2-6. of factors symmetry of the structure, only half-left beams are complicatedly influenced by a lot Assuming like the formation of failure mechanism by crack structure models are considered. In the analysis cases propagation, size effects in tensile fracture, localized C, the finite elements in the web plain concrete A and shear-compressive failure, and so on. Therefore, a portion are enlarged similarly to discretize the three numerica l simulation of the failure mechanism in test specimens with different sizes into individual rein forced concre te deep beams is important to finite element meshes. The nonlocal MESP Model is establish a rational shear design method for them. used for the plain concrete portions of the specimens In the present study, a genera l purpo se finite in the analysis case A.