Investigation of Nonlinear Behavior of the Reinforced Concrete Columns for Different Confined Concrete Models

Abstract

Stress-strain and moment-curvature behavior of the reinforced concrete (RC) square columns have been analytically investigated according to different confined concrete models. Figure. Stress-strain and moment-curvature relationships for reinforced concrete columns AimInvestigations of the effect of transverse reinforcement ratio and axial load on the behavior of the reinforced concrete square columns are the main purpose of this study. Design & MethodologyTo better understand the non-linear behavior, information was provided about stress-strain behavior models recommended by the TBEC (2018), Mander et al., (1988), Saatcioglu and Ravzi (1992. Using the proposed models of confined concrete compressive strength of the RC column models were investigated analytically. OriginalityThe literature on the confined concrete models has been reviewed and the stress-strain and moment-curvature relationships of reinforced concrete elements have been calculated according to the current TBDY (2018) regulation. Comparison of the nonlinear behaviors obtained from the TBDY (2018) and the confined concrete models found in the literature has been a current study on behalf of the literature. FindingsThe greatest ultimate curvature values were calculated from the Saatcioglu and Ravzi models (average 24%). In the examination of ultimate curvature values obtained according to the Mander model and TBEC, there is not much difference. There is a negligible difference between the ultimate moment values obtained according to the Mander model and TBEC. It is seen from the results of the analysis that there is not much difference between the stress and strain values obtained for these two models. According to Mander, Saatcioglu and Ravzi models, the average difference value is 3.1% between the ultimate moment values. ConclusionAs a result, it has been observed that when the close to minimum and minimum spacing value, high confined concrete strength values and the ultimate moment values are obtained from the Mander model than Saatcioglu and Ravzi model. These differences are not much between the Mander model and TBEC (2018).

Calculation Model for Estimation of Residual Bearing Capacity of Damaged Reinforced Concrete Slender Columns

“…To study the bearing capacity, plasticity, and failure mode of reinforced concrete structures, it is necessary to analytically investigate the nonlinear behavior [14] of reinforced concrete structures. Therefore, in reinforced concrete structures, due to the importance of flexibility and bearing capacity under lateral loads, it is necessary to look for ways to increase plasticity and bearing capacity.…”