Experimental behavior and reliability of predamaged concrete columns externally repaired with FRP spiral strips under axial compression

IF 1.4 Q2 ENGINEERING, MULTIDISCIPLINARY

World Journal of Engineering Pub Date : 2022-09-27 DOI:10.1108/wje-06-2022-0248

Chafika Ali Ahmed, Abdelmadjid Si Salem, Souad Ait Taleb, K. Ait tahar

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引用次数: 3

Abstract

Purpose This paper aims to investigate the experimental behavior and the reliability of concrete columns repaired using fiber-reinforced polymers (FRPs) under axial compression loading. The expression of the ultimate axial resistance was assessed from the experimental data of damaged concrete cylinders repaired by externally bonded double-FRP spiral strips. Design/methodology/approach The tested columns bearing capacity mainly depends of the elasticity modulus of both damaged and undamaged concrete have been considered in addition to the applied load and the cylinder diameter as random variables in the expression of the failure criterion. The reliability indicators were assessed using first order second moment method. Findings The emphasized test results, statistically fitted show that the strength has been retrofitted for all repaired specimens whatever the degree of initial damage. However, the gain in axial strength is inversely proportional to the degree of damage. Originality/value The efficiency of a new FRP repair procedure using double-spiral strips was studied. This research provides a technical and economical solution for retrofitting existing concrete columns. Finally, the random character of the variables that govern the studied system shows the accuracy and safety of the proposed original design.

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轴压作用下FRP螺旋带外修复预损伤混凝土柱的试验性能和可靠性

目的研究纤维增强聚合物（FRP）修复混凝土柱在轴压荷载作用下的试验性能和可靠性。根据外粘双FRP螺旋带修复受损混凝土圆柱体的实验数据，评估了极限轴向阻力的表达式。设计/方法/方法试验柱的承载力主要取决于受损和未受损混凝土的弹性模量，此外，在破坏标准的表达式中，还考虑了施加的荷载和圆柱体直径作为随机变量。可靠性指标采用一阶二阶矩法进行评估。结果强调的试验结果，统计拟合表明，无论初始损伤程度如何，所有修复试样的强度都经过了改进。然而，轴向强度的增加与损伤程度成反比。独创性/价值研究了一种使用双螺旋带的新型FRP修复程序的效率。本研究为现有混凝土柱的改造提供了一种技术经济的解决方案。最后，控制所研究系统的变量的随机性表明了所提出的原始设计的准确性和安全性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

World Journal of Engineering ENGINEERING, MULTIDISCIPLINARY-

CiteScore

4.20

自引率

10.50%

发文量

期刊介绍： The main focus of the World Journal of Engineering (WJE) is on, but not limited to; Civil Engineering, Material and Mechanical Engineering, Electrical and Electronic Engineering, Geotechnical and Mining Engineering, Nanoengineering and Nanoscience The journal bridges the gap between materials science and materials engineering, and between nano-engineering and nano-science. A distinguished editorial board assists the Editor-in-Chief, Professor Sun. All papers undergo a double-blind peer review process. For a full list of the journal''s esteemed review board, please see below.