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Finite element modelling and theoretical predictions of FRP-reinforced concrete columns confined with various FRP-tubes
Structures ( IF 4.1 ) Pub Date : 2020-05-11 , DOI: 10.1016/j.istruc.2020.04.033
Ali Raza , Anees ur Rehman , Bilal Masood , Iqrar Hussain

The present research work has endeavored to investigate the structural behavior of fiber reinforced polymer (FRP) reinforced concrete columns confined with FRP-tubes under axial concentric and eccentric loadings. A finite element analysis (FEA) model of FRP-tube confined concrete columns having longitudinal reinforcements of either carbon fiber reinforced polymer (CFRP) and/or glass fiber reinforced polymer (GFRP) bars, was simulated using a finite element (FE) package ABAQUS 6.14 which was then, calibrated for different material and geometric models of concrete, FRP-tube and FRP longitudinal reinforcement using the experimental results from the literature. The comparative study shows that the proposed FEA model presented a close agreement with the experimental measurements. A detailed parametric study was performed using the FEA model to examine the effects of various parameters of FRP composite columns on the axial load capacity and axial deflection. Moreover, a large database of axial strengths of 685 FRP-confined concrete compression members was developed from the previous researches to propose an empirical model that predicts the ultimate axial strength of FRP reinforced concrete columns confined with FRP-tubes accurately. The comparison of predictions of the proposed empirical model with the FEA predictions from the parametric study portrayed a close agreement among them. Thus, the proposed models are accurate enough to predict the behavior of FRP reinforced concrete columns confined with FRP-tubes.



中文翻译:

各种FRP管约束的FRP钢筋混凝土柱的有限元建模与理论预测

本研究工作致力于研究在轴向同心和偏心荷载作用下,FRP管约束的纤维增强聚合物(FRP)钢筋混凝土柱的结构性能。使用有限元(FE)封装ABAQUS模拟了具有碳纤维增强聚合物(CFRP)和/或玻璃纤维增​​强聚合物(GFRP)钢筋的纵向增强的FRP管约束混凝土柱的有限元分析(FEA)模型。然后使用文献中的实验结果对混凝土,FRP管和FRP纵向钢筋的不同材料和几何模型进行校准6.14。对比研究表明,所提出的有限元分析模型与实验测量结果非常吻合。使用FEA模型进行了详细的参数研究,以检查FRP复合柱的各种参数对轴向承载能力和轴向挠度的影响。此外,从以前的研究中建立了一个大型的685 FRP约束混凝土抗压构件的轴向强度数据库,以建立一个经验模型,该模型可以精确地预测FRP管约束的FRP钢筋混凝土柱的极限轴向强度。所提出的经验模型的预测与参数研究的FEA预测的比较表明,它们之间有着密切的一致性。因此,所提出的模型足够准确以预测由FRP管约束的FRP钢筋混凝土柱的性能。此外,从以前的研究中建立了一个大型的685 FRP约束混凝土抗压构件的轴向强度数据库,以建立一个经验模型,该模型可以精确地预测FRP管约束的FRP钢筋混凝土柱的极限轴向强度。所提出的经验模型的预测与参数研究的FEA预测的比较表明,它们之间有着密切的一致性。因此,所提出的模型足够准确以预测由FRP管约束的FRP钢筋混凝土柱的性能。此外,从以前的研究中建立了一个大型的685 FRP约束混凝土抗压构件的轴向强度数据库,以建立一个经验模型,该模型可以精确地预测FRP管约束的FRP钢筋混凝土柱的极限轴向强度。所提出的经验模型的预测与参数研究的FEA预测的比较表明,它们之间有着密切的一致性。因此,所提出的模型足够准确以预测由FRP管约束的FRP钢筋混凝土柱的性能。所提出的经验模型的预测与参数研究的FEA预测的比较表明,它们之间有着密切的一致性。因此,所提出的模型足够准确以预测由FRP管约束的FRP钢筋混凝土柱的性能。所提出的经验模型的预测与参数研究的FEA预测的比较表明,它们之间有着密切的一致性。因此,所提出的模型足够准确以预测由FRP管约束的FRP钢筋混凝土柱的性能。

更新日期:2020-05-11
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