Hybrid Externally Bonded/Mechanically Fastened Fiber-Reinforced Polymer for RC Beam Strengthening

2011 ◽  
Vol 108 (6) ◽  
Keyword(s):  
Fiber Reinforced Polymer ◽  
Rc Beam ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Externally Bonded ◽  
Mechanically Fastened ◽  
Beam Strengthening

A proposed strengthening model considering interaction of concrete-stirrup-FRP system for RC beams shear-strengthened with EB-FRP sheets

2018 ◽  
Vol 37 (10) ◽  
pp. 685-700 ◽  
Author(s):  
Weiwen Li ◽  
Chengyue Hu ◽  
Zejie Pan ◽  
Wei Peng ◽  
Yong Yang ◽  
...  
Keyword(s):  
Effective Strain ◽  
Polymer System ◽  
Design Guidelines ◽  
Shear Capacity ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
Externally Bonded

Many factors can affect the shear capacity of fiber-reinforced polymer in reinforced concrete beams shear-strengthened with externally bonded fiber-reinforced polymer composites. Undoubtedly, the interaction of concrete-stirrup-fiber-reinforced polymer system is one of the key factors. However, most of the existing fiber-reinforced polymer design guidelines do not take account of this important factor on predicting fiber-reinforced polymer shear capacity. This study provides an advanced strengthening model that comprehensively considers the interaction among concrete, stirrup, and fiber-reinforced polymer for calculating the fiber-reinforced polymer effective strain. The advanced strengthening model provides a more accurate prediction for the fiber-reinforced polymer shear contribution compared with existing design guidelines.

Alkali and temperature long-term effect on the bond strength of fiber reinforced polymer-to-concrete interface

2017 ◽  
Vol 52 (15) ◽  
pp. 2103-2114 ◽  
Author(s):  
Mahdie Mohammadi ◽  
Majid Barghian ◽  
Davood Mostofinejad ◽  
Adel Rafieyan
Keyword(s):  
Bond Strength ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Particle Image Velocimetry Technique ◽  
Reinforced Polymer ◽  
Long Term Effect ◽  
Image Velocimetry ◽  
Externally Bonded ◽  
Bond Characteristics

The effects of such environmental conditions as alkali media at temperatures of 23℃, 40℃, and 60℃ were investigated on the fiber reinforced polymer-to-concrete bond strength. For this purpose, 42 specimens were strengthened via the externally bonded reinforcement and the externally bonded reinforcement on grooves techniques. The specimens were later subjected to the single-shear test after the specified durations of exposure to an alkaline medium. The particle image velocimetry technique was used to investigate such bond characteristics of the strengthened specimens as load-slip behavior, strain profiles, and strain fields along the fiber reinforced polymer-to-concrete bond. Experimental results showed that the specimens strengthened via the externally bonded reinforcement on grooves method exhibited ultimate bond loads by up to 50% higher than those strengthened via the externally bonded reinforcement method.

scholarly journals A STATE OF THE ART REVIEW OF EFFICIENCY THE FLEXURAL STRENGTHENING OF REINFORCED CONCRETE BEAM BY USING FIBER REINFORCEMENT POLYMER MATERIALS

2021 ◽  
Vol 25 (Special) ◽  
pp. 4-88-4-99
Author(s):  
Wissam S. Abdullah ◽  
◽  
Hassan F. Hassan ◽  
Keyword(s):  
Reinforced Concrete ◽  
Reinforced Concrete Beam ◽  
Polymer Materials ◽  
Fiber Reinforced Polymer ◽  
Maintenance Cost ◽  
Rc Beam ◽  
Fiber Reinforced ◽  
Construction Time ◽  
Near Surface ◽  
Reinforced Polymer

Fiber Reinforced Polymer (FRP) materials are commonly used in civil engineering construction purposes owing their advantages like lightweight, corrosion resistance, high strength, various types available, ease of installation, lower installation costs, shorter construction time and lower maintenance cost [1]. Over the last few decades, flexural Reinforced Concrete (RC) beams reinforcement and maintenance with Near-Surface Mounted (NSM) or Externally Bonded Reinforcement (EBR) Fiber Reinforced Polymer has gained considerable interest and obtained widespread acceptance among civil engineers [2]. This paper reviews previous research on RC beam strengthening by NSM or EBR FRP technique and show the effects of FRP strengthening on flexural strength of RC beam.

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