A CONSTITUTIVE MODEL FOR CRACKING OF CONCRETE BASED ON THE INCREMENTAL THEORY OF PLASTICITY

E. OÑATE; S. OLLER; J. OLIVER; J. LUBLINER

Conferencia; First International Conference on Computational Plasticity - COMPLAS I; 1987

In this paper a constit utive model based on non associated plasticity theory for the numerical analysis of cracking in concrete structures using finite elements is presented. The model uses the typical parameters of plasticity theory for frictional materials like cohesion, internal friction angle and dilatancy angle for defining the yield and plastic potential surfaces. Onset of cracking is controlled by the positive values of t he effective plastic strain and thus it can be studied in a posterior postprocessing of the numerical results . A method for achieving objetivity of the results is presented. The accuracy and objetivity of the model is checked out with sorne examples of application .