Numerical Analysis of Reinforced Concrete Corbels Using Concrete Damage Plasticity: Sensitivity to Material Parameters and Comparison with Analytical Models
Ygor Moriel Neuberger,
Maykon Vinicius Andrade,
Alex Micael Dantas de Sousa,
Mariana Bandieira,
Edivaldo Pereira da Silva Júnior,
Herisson Ferreira dos Santos,
Bruna Catoia,
Emerson Alexandro Bolandim,
Vinicius Borges de Moura Aquino,
André Luis Christoforo,
Marcelo de Araújo Ferreira
Affiliations
Ygor Moriel Neuberger
Department of Civil Engineering, Federal University of Sao Carlos, Sao Carlos 13565-905, Sao Paulo, Brazil
Maykon Vinicius Andrade
Department of Civil Engineering, Federal University of Sao Carlos, Sao Carlos 13565-905, Sao Paulo, Brazil
Alex Micael Dantas de Sousa
Sao Carlos Engineering School, University of Sao Paulo, Sao Carlos 13566-590, Sao Paulo, Brazil
Mariana Bandieira
Department of Civil Engineering, Federal University of Sao Carlos, Sao Carlos 13565-905, Sao Paulo, Brazil
Edivaldo Pereira da Silva Júnior
Federal Institute of Rondonia, Campus Ariquemes, Ariquemes 76870-000, Rondonia, Brazil
Herisson Ferreira dos Santos
Federal Institute of Rondonia, Campus Ariquemes, Ariquemes 76870-000, Rondonia, Brazil
Bruna Catoia
Department of Civil Engineering, Federal University of Sao Carlos, Sao Carlos 13565-905, Sao Paulo, Brazil
Emerson Alexandro Bolandim
Department of Civil Engineering, Universidade Estadual Paulista (UNESP), Ilha Solteira 15385-000, Sao Paulo, Brazil
Vinicius Borges de Moura Aquino
Department of Civil Engineering, Universidade Estadual Paulista (UNESP), Ilha Solteira 15385-000, Sao Paulo, Brazil
André Luis Christoforo
Department of Civil Engineering, Federal University of Sao Carlos, Sao Carlos 13565-905, Sao Paulo, Brazil
Marcelo de Araújo Ferreira
Department of Civil Engineering, Federal University of Sao Carlos, Sao Carlos 13565-905, Sao Paulo, Brazil
The Concrete Damage Plasticity (CDP) model is a widely used constitutive model to represent the non-linear behavior of concrete in numerical analysis. However, a limited number of studies compared the level of accuracy of numerical models with the main code provisions from the literature. In addition, the influence of CDP material parameters on the structural behavior of corbels was scarcely studied. This study proposes to evaluate the ability of numerical models using CDP to represent the structural behavior of corbels regarding the ultimate load, reinforcement deformation and failure mechanism. In addition, we compared the predictions of the numerical models with the ones from design code expressions regarding the ultimate capacity. For this, three test results of corbels from the literature were evaluated with numerical models using the CDP, as well as with analytical models from different code provisions. A sensitivity analysis—by changing the dilation angle (ψ) and shape factor (Kc)—was performed. The comparison between tested and predicted resistances with the proposed numerical modeling choices was equal to 1.04 with a coefficient of variation of 11%. On the other hand, the analytical models evaluated overestimated the corbel capacity by more than 62%, on average. Therefore, the proposed modeling choices provide better predictions of ultimate capacity than the evaluated analytical models and can be used to assess the corbel design under more complex boundary conditions.
