Finite Element Solutions with Nonlocal Microplane Model

Additional insight and even partial validation of the design formulas for brittle failures of concrete struc­tures, including diagonal shear, can be gained from careful finite element analysis based on a realistic material model verified over abroad range of experimentally observed behavior. One such model appears to be the nonlocal finite element model combined, on the material level, with the microplane model for the stress-strain relation (Bazant, Ozbolt and Eligehausen 1994). These models, which will be discussed in detail in Chapters 13 and 14, provided, for the diagonal shear tests of Bazant and Kazemi, the results shown by the triangular data points in Fig. 10.2.8. The figure also shows the test data and the best fit by the size effect law. It is seen that the agreement is quite close.