Affiliation:
1. Department of Civil Engineering, Faculty of Engineering, Aydin Adnan Menderes University, Aydin 09100, Türkiye
Abstract
The utilization of externally bonded carbon fiber-reinforced polymers (CFRPs) and glass fiber-reinforced polymers (GFRPs) for reinforcing and retrofitting components has garnered considerable interest recently, as such composites provide beneficial properties, including a high modulus of elasticity, high strength, and low weight. This work conducts a finite element analysis, verified through laboratory experiments on 14 reinforced concrete (RC) beams. The primary focus is the final load of these components, considering varying CFRP orientations relative to the loading direction. In this research, the performances of control beams and RC beams are compared to assess the effectiveness and efficiency of different strengthening methods. The results demonstrated that bonding CFRP sheets with V-shaped end anchorages on the tension side was highly effective in improving the flexural capacity of RC beams in the weaker concrete strength group. This strengthening method resulted in a substantial increase in strength (of around 29.8%) in the higher concrete strength group. In addition, utilizing V-shaped end anchorages to bond CFRP sheets on the tension side proved to be a highly efficient technique for improving flexural strength. Conversely, bonding inclined CFRP strips to the sides of RC beams was highly effective at enhancing the shear capacity of the beams. These outcomes convincingly demonstrate the effectiveness of FRP for the reinforcement of structural components. The specimens strengthened with inclined strips exhibited enhanced shear and deformation capacity compared to those strengthened with vertical strips.
Funder
Scientific and Technological Research Council of Türkiye
Scientific Research Project at Aydin Adnan Menderes University
Subject
Building and Construction,Civil and Structural Engineering,Architecture
Reference56 articles.
1. ACI Committee 440 (2008). Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures (ACI 440.2R-08), American Concrete Institute.
2. Hollaway, L.C., and Head, P.R. (2001). Advanced Polymer Composites and Polymers in the Civil Infrastructure, Elsevier Science Ltd.
3. Behaviour and strength of FRP-strengthened RC structures: A state-of-the-art review;Teng;Proc. Inst. Civ. Eng. Struct. Build.,2003
4. Teng, J.G., Chen, J.F., Smith, S.T., and Lam, L. (2002). FRP: Strengthened RC Structures, John Wiley & Sons.
5. FRP composites for strengthening civil infrastructure around the world;Tumialan;SAMPE J.,2002