Özet:

Nonlinear analysis of reinforced concrete elements becomes significant in nowadays with the developing technology and current design codes using this technology. Precise concrete and reinforcement material models are required for accurate modeling of reinforced concrete structures and performing nonlinear analysis. There are many studies on this subject in the literature. Especially in high-rise building design, the importance of the accuracy of the concrete and reinforcing bar model used with the modeling of reinforced concrete shear walls according to the distributed plasticity theory has increased. In this study, the nonlinear behavior of relatively slender reinforced concrete shear walls was investigated by using three different concrete models that predict the nonlinear behavior of concrete material developed for reinforced concrete elements. In accordance with the theories of these material models, parabolic curves of different concrete classes (e.g. C30 and C40) were obtained using the aforementioned models. The obtained concrete parabolic material models were simplified as curves consisting of linear branches to be defined in the Perform 3D structural analysis program. In the package program, the relatively slender reinforced concrete shear walls were analyzed by changing concrete materials, concrete classes and reduction coefficients due to strain under cyclic loads. The analysis results were scrutinized by comparing with each other and experimental results, and it was determined that the different material models were in agreement with each other in the nonlinear analysis results of reinforced concrete wall with an aspect ratio of 3.0. However, in the nonlinear analysis of reinforced concrete shear walls with aspect ratios of 2.0 and 1.5, it was revealed that the selection of concrete material models and the use of different concrete strengths affected the results.

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