Nowadays, the practice of fiber-reinforced polymers (FRPs) as an internal reinforcement and external wrapping has been expanded in the construction industry. No theoretical model for estimating the compressive strength (CS) of FRP bars reinforced concrete (RC) columns wrapped with FRP sheets (FRCFS columns) has been found in the literature. The main goal of the current research work is to recommend a new theoretical model for estimating the CS of FRCFS columns. To secure the aims of the present work, the previous research works were employed to construct two different records. The first record consists of 500 sample points of FRP-wrapped concrete specimens, and the second record consists of 269 sample points of FRP bars RC columns. Some initial assessments were carried out on the collected records to select the most suitable forms of the recommended models for FRP-wrapping and CS of FRP bars RC columns. The estimations of these models presented higher accuracy as compared with the previously recommended models. Finally, a new theoretical model was recommended for the CS of FRCFS columns. Then, an extensive parametric study of 216 specimens of FRCFS columns was carried out using the recommended theoretical model.

中文翻译：

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FRP-钢筋和约束混凝土柱的抗压强度

如今，纤维增强聚合物 (FRP) 作为内部增强材料和外部包裹材料的做法已在建筑行业得到扩展。文献中没有找到用于估算用 FRP 板包裹的 FRP 钢筋混凝土 (RC) 柱（FRCFS 柱）的抗压强度 (CS) 的理论模型。当前研究工作的主要目标是推荐一种新的理论模型来估计 FRCFS 柱的 CS。为了确保当前工作的目标，以前的研究工作被用来构建两个不同的记录。第一个记录包含 500 个 FRP 包裹混凝土试件的样本点，第二个记录包含 269 个 FRP 钢筋钢筋混凝土柱的样本点。对收集的记录进行了一些初步评估，以选择最适合 FRP 包裹和 FRP 钢筋钢筋混凝土柱 CS 的推荐模型形式。与之前推荐的模型相比，这些模型的估计具有更高的准确性。最后，为 FRCFS 柱的 CS 推荐了一种新的理论模型。然后，使用推荐的理论模型对 216 个 FRCFS 柱试样进行了广泛的参数研究。