Sürdürülebilir Kalkınma Amaçları

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• MakaleAçık Erişim2025/r/munzur/2111
  Predicting shear strength in reinforced concrete deep beams through finite element modeling of diverse concrete materials

  Polat, Erkan; Karaman, Gökhan

  This study investigates the prediction of the strength of reinforced concrete deep beams, critical components in urban infrastructure, by evaluating their load-carrying capacities through finite element modeling and nonlinear inelastic analyses using LSDYNA software. Four widely used concrete material models were examined: Mat084/085, Mat159, Mat072R3, and Mat016. Analyses were conducted on two single-span and four double-span beams with varying reinforcement configurations and an aspect ratio of 1.0, based on well-documented experimental setups. Comparative analyses of force-displacement behavior and stress distributions revealed significant differences in shear strength predictions across the models, with Mat159 providing the most accurate results. These findings establish a reliable and cost-effective approach for predicting the capacities of deep beams, reducing reliance on extensive experimental testing. The study contributes valuable insights for improving strength predictions in critical infrastructure applications such as bridges and foundations.

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  AtıfScopus2·TR Dizin2

  İncele
• MakaleAçık Erişim2022/r/munzur/6522
  Boundary plate influence on tie bars axial force demands in composite plate shear walls‒concrete filled

  Polat, Erkan

  In composite plate shear walls–concrete filled (C-PSW/CF), there is an indeterminate flow of force between concrete, steel plate and tie bars. Finite element methods (FEM) are frequently used to verify this force flow. The theoretical models available in the literature to predict the tie bar maximum axial force demands were based on walls without boundary plates. The finding in this study is intended to help understand whether current theoretical approaches are conservative and can be applied to boundary plate walls as well. Within the scope of this study, tie bar axial force de-mands for walls with boundary plates consisting of planar and round shapes and without boundary plates were investigated and compared. For this, a previously benchmarked finite element (FE) wall model was considered and configured to have no boundary plate and have planar and round boundary plates. FE models were ana-lyzed under monotonic lateral displacement up to 4% drift ratio. Passive lateral pres-sures and transverse force variations on the planar and round boundary plates were investigated.

  AtıfOpenAlex2·TR Dizin1

  İncele
• MakaleAçık Erişim2020/r/munzur/6810
  Investigation of influence of concrete material models on cyclic inelastic response of a concrete filled composite plate shear wall

  Polat, Erkan

  A previously benchmarked finite element model of a previously tested compositeplate shear wall-concrete filled (C-PSW/CF) was used to investigate the influence ofthree concrete material models on in-plane cyclic inelastic wall response, using LSDyna. The concrete material models considered were the Winfrith, KCC and CSCM, allavailable in LS-Dyna. Wall moment hysteresis, using the three concrete materialmodels, were obtained and compared. Individual contribution of the steel and concrete to total base moment was investigated for each wall with the three concrete material models. The numerical results obtained using the KCC and CSCM were comparedagainst the benchmarked results obtained using the Winfrith concrete material model.Moment contribution of the steel web and the steel boundary on total base moment ofthe steel part of the wall and moment contribution of the concrete web and concreteboundary on total base moment of the concrete part of the wall were individuallyinvestigated. The wall models with the KCC and CSCM concrete models were observed to cannot capture wall pinching which was captured by the Winfrith concretemodel. The wall strength was overpredicted by the CSCM concrete model and predicted reasonably by the KCC concrete model. Average axial stress distribution of theinfill concrete was obtained to investigate wall neutral axis and the maximum attained concrete strength using the three concrete models. Concrete axial stress distribution showed some level of confinement for the concrete models considered.

  AtıfOpenAlex1·TR Dizin2

  İncele