其他摘要：This work presents a formulations, that allows us the obtain interaction diagrams for seccional forces in concrete plates corresponding to ultimate limit states. Interaction diagrams based on this formulation are comparad with those obtained with the application of the Johansen criterions which bas been used broadly for tbe definition of design criteria. The proposed formulation can be easely extended to the problem of shells, considering the umbrae effects what is not po.sible with the Johansen criterion.
