Coffee Talk - "Plastic damage constitutive model with variable dilatancy for concrete", by Mauro Poliotti
Place: O.C. Zienkiewicz Conference Room, C1 Building, UPC Campus Nord, Barcelona
Typical damage-plastic models for concrete use constant dilatancy parameter and need particular calibration of it when reproducing experimental observations on problems sensitive to connement and shear softening. This makes the model calibration not objective for general applications. In this presentation, a constitutive plastic-damage model with evolutive dilatancy is proposed for concrete. The evolution of dilatancy is made dependent on the plastic-damage and stress states. The proposed evolution law is developed and validated by comparison of numerical simulation with available experimental results. The validation include concrete specimens under uniaxial compression with dierent strengths measuring the free expansion, and reinforced concrete panels under in plane stresses. Applications of the proposed model in the simulation of reinforced concrete beams and columns are also presented. It is concluded that the model accurately reproduces concrete lateral expansion through dierent non linear states. Proper modeling of concrete non linear expansion results essential for objectively capture the response in situations prone to softening under high shear stresses, connement and on the ductility assessment.
Mauro Poliotti is a PhD candidate at the Department of Civil and Environmental Engineering UPC under the supervision of Prof. Jesús Miguel Barian and Prof. Oscar Moller. He has a Civil Engineering degree from the National University of Rosario, Argentina, and a Master of Science degree with specialization in Structures and Solid Mechanics Modelling and Simulation from the Faculty of Science of the Sorbonne University and the École Nationale de Ponts et Chaussees, Paris, France.