A new concrete plastic-damage model with an evolutive dilatancy parameter
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10.1016/j.engstruct.2019.03.086
Inclou dades d'ús des de 2022
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hdl:2117/131799
Tipus de documentArticle
Data publicació2019-04-04
EditorElsevier
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
ProjecteEVALUACION DE LA CAPACIDAD RESISTENTE FRENTE A ESFUERZOS TANGENTES DE ESTRUCTURAS DE HORMIGON MEDIANTE MODELOS MECANICOS PARA LA EXTENSION DE SU VIDA UTIL (MINECO-BIA2015-64672-C4-1-R)
PROYECTO BASADO EN PRESTACIONES DE ESTRUCTURAS DE HORMIGON PARCIALMENTE PRETENSADAS. PROPUESTA DE NUEVA METODOLOGIA, VERIFICACION EXPERIMENTAL Y CRITERIOS DE PROYECTO. (MINECO-BIA2012-36848)
PROYECTO BASADO EN PRESTACIONES DE ESTRUCTURAS DE HORMIGON PARCIALMENTE PRETENSADAS. PROPUESTA DE NUEVA METODOLOGIA, VERIFICACION EXPERIMENTAL Y CRITERIOS DE PROYECTO. (MINECO-BIA2012-36848)
Abstract
Typical plastic-damage models for concrete use a constant dilatancy parameter. On problems sensitive to confinement and shear softening, this parameter needs ad hoc calibration to fit experimental observations. This makes the model not objective for general applications. To overcome this issue, in this paper, 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 validated by comparison of numerical simulations with available experimental results. The validation includes: concrete specimens under uniaxial compression measuring the free expansion, passively confined concrete specimens with different confining materials, and reinforced concrete panels under in-plane shear. It is concluded that the model accurately reproduces concrete lateral expansion through different nonlinear states. Proper modeling of concrete nonlinear expansion proves essential for capturing the response in a number of situations: softening under high shear stresses, confinement, and ductility assessment.
CitacióPoliotti, M.; Bairan, J.M. A new concrete plastic-damage model with an evolutive dilatancy parameter. "Engineering structures", 4 Abril 2019, vol. 189, núm. 15, p. 541-549.
ISSN0141-0296
Versió de l'editorhttps://www.sciencedirect.com/science/article/pii/S0141029618333686
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