The scaled recycled coarse aggregate concrete beam specimen tests have been simulated in FEA based analysis software, ATENA 3D, which is explicitly developed for analysis of RCC structural elements. ATENA 3D offers freedom to the users to define the measured stress–strain relations hip of the materials as input parameters through user-defined material definitions. Two numbers of scaled RC beam specimens were tested in the laboratory and subsequently simulated to analyse the response. Each beam specimen was (125 × 250) mm in cross-section and 2100 mm long. Experimentally evaluated values of compressive strength, split tensile strength and elastic modulus of concrete besides reported values of thermal coefficients and Poisson’s ratio of concrete have been used as inputs against default inputs to explore the enhancement in the quality of simulation. Furthermore, in order to explore the potential for enhancing the simulation, the utilization of measured stress–strain relationship for the materials has been examined as an alternative to the default values. For subsequent analysis, a commonly reported constitutive relationship for recycled coarse aggregate concrete, as reported in the literature, has been considered. In addition to strength, the load deformation characteristics of simulated beams were compared to those of beam specimens examined in the laboratory. The outcomes show that, tends of load-carrying capacity reflect similar behaviour, especially with due consideration of appropriate input parameters.