Consideration of reinforced concrete crushing through cohesive models

Resumo

In this work, the overlapping crack mode is considered. It permits the modelling of concrete crushing through cohesive surfaces, in a similar way used to simulate fracture. The material is considered in damage when the surfaces interpenetrate each other. Besides simplicity, the big advantage of the methodology is the fact that constitutive relations are independent of the material scale. A generalization is here introduced to consider mixed crushing. Exploratory applications are done considering super-reinforced beams. The effects of the high of the beams, compressive rebars and stirrups are investigated. A good fitting with experiments is obtained.