Finite element modeling of prestressed reinforced concrete haunched beams

In this study, two types of nonlinear analysis were conducted to examine the behavior of prestressed concrete, which is one of the most important inventions in today's engineering and architecture field. The first nonlinear analysis is finite element analysis. Considering the properties of a prestressed concrete(PC) haunched beam used in the literature study, it was modeled with the ATENA 2D. As a result of the modeling, it was determined that the experimental model and the analytical model showed similar behaviors. Then, 180 PC haunched beams and 144 PC rectangular beams were modeled with ATENA 2D. These models have changed various parameters: (α / dm) ratio, prestressing force, concrete compressive strength, and reinforcement ratio were changed for analysis. These models changed various parameters: (α / dm) ratio, prestress strength, concrete compressive strength, and reinforcement ratio were changed and analyzed. Various findings were reached as a result of these analyzes. With the increase in the reinforcement ratio and compressive strength of the concrete, the load-bearing capacity of the PC haunched beams and RC prismatic beams has increased. The effectiveness of the prestressed reinforcement ratio on the prestressing force was observed. With the increase in (α / dm) ratio, the effectiveness of the prestress force on the failure load decreased. It was also observed that the prestressing force increased the cracking load of concrete. The second analysis is probabilistic nonlinear analysis(PNA). In this analysis, PNA of 180 PC haunched beams was performed. Reliability, sensitivity, and histogram analysis results of all beams were obtained.