Finite element analysis of reinforced graded concrete beams using simplified damage plasticity model approach

• Main Authors: Pratama, M. Mirza Abdillah, Putra, Rhamadani Ryan Yudhatama, Maulana, Rizal, Istiqomah, Dinda Ainur, Nindyawati, Nindyawati, Karyadi, Karyadi, Gan, Buntara Sthenly
• Format: Conference Proceeding
• Language: English
• Subjects: Boundary conditions; Composite materials; Concrete; Constitutive models; Damage; Finite element method; Load resistance; Material properties; Mathematical models; Numerical analysis; Plastic properties; Reinforced concrete; Stiffness
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0093873

Research-based on numerical studies requires comprehensive competence at least in determining material properties, failure criteria, element modelling, boundary conditions, and loading iterations used. The results of reliable modelling of materials, elements, and structures can be used as a validation instrument from the results of previous experimental tests or as a preliminary study before carrying out laboratory-based research. Reinforced concrete is a composite material that has complexity in numerical modelling. Errors in determining the interaction between the constituent materials and elements interaction result in a non-converging solution. Previous research related to numerical studies of graded concrete beams found that there were limitations so that the results of the analysis could not be compared with the experimental results. In this study, the research intends to evaluate the basics and approaches to modelling graded concrete beams, especially in terms of the constitutive model of the material used. The results of the study show that: (a) Kent and Park’s constitutive concrete model can be used as the basis for developing a simplified damage plasticity model approach for finite element modelling of graded concrete; (b) Graded concrete beams can provide a level of performance in the form of elastic stiffness and load capacity in yield conditions; (c) Graded concrete beams have better post-rupture load resistance, which is characterized by a slower rate of increase in deflection and strain of tensile reinforcement, compression reinforcement, and tensile fibre concrete; and (d) Graded concrete beams can dissipate maximum energy through the crack formation along the beam span.