TY - GEN

T1 - A nonlocal coupled damage-plasticity model for concrete

AU - Nguyen, G. D.

AU - Korsunsky, A. M.

PY - 2007

Y1 - 2007

N2 - The paper presents a non-local constitutive model for the mechanical behaviour of concrete that is based on damage mechanics and plasticity theory. To model the material deterioration due to cracking and residual deformation due to friction, the presented model uses two loading surfaces corresponding to damage and plastic frictional mechanisms. Non-local regularization is used in this study, realized through the non-locality of the energy term in the damage loading function. The particular focus of this study is the calibration of the model parameters. It is shown that both the local behaviour parameters and the parameters governing the non-local material point interaction can be determined from experimental data reliably and consistently. A novel procedure is developed for parameter identification, using the separation of total dissipation energy into additive parts corresponding to different dissipation mechanisms. The relationship between the local and non-local parameters is also addressed, helping to obtain model responses consistent with the fracture energy of the material.

AB - The paper presents a non-local constitutive model for the mechanical behaviour of concrete that is based on damage mechanics and plasticity theory. To model the material deterioration due to cracking and residual deformation due to friction, the presented model uses two loading surfaces corresponding to damage and plastic frictional mechanisms. Non-local regularization is used in this study, realized through the non-locality of the energy term in the damage loading function. The particular focus of this study is the calibration of the model parameters. It is shown that both the local behaviour parameters and the parameters governing the non-local material point interaction can be determined from experimental data reliably and consistently. A novel procedure is developed for parameter identification, using the separation of total dissipation energy into additive parts corresponding to different dissipation mechanisms. The relationship between the local and non-local parameters is also addressed, helping to obtain model responses consistent with the fracture energy of the material.

UR - http://www.scopus.com/inward/record.url?scp=56349104492&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:56349104492

SN - 0415440653

SN - 9780415440653

T3 - Proceedings of the 6th International Conference on Fracture Mechanics of Concrete and Concrete Structures - Fracture Mechanics of Concrete and Concrete Structures

SP - 351

EP - 359

BT - Proceedings of the 6th International Conference on Fracture Mechanics of Concrete and Concrete Structures - Fracture Mechanics of Concrete and Concrete Structures

T2 - 6th International Conference on Fracture Mechanics of Concrete and Concrete Structures - Fracture Mechanics of Concrete and Concrete Structures

Y2 - 17 June 2007 through 22 June 2007

ER -