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Machine Learning Framework for Predicting Failure Mode and Flexural Capacity of FRP-Reinforced Beams
Published in M.Z. Naser, Leveraging Artificial Intelligence in Engineering, Management, and Safety of Infrastructure, 2023
Ahmad N. Tarawneh, Eman F. Saleh
Corrosion of steel bars is a major concern in reinforced concrete (RC) structures (Wight, 2016). Fiber-reinforced polymers (FRP) bars provide a promising substitution to steel bars in RC structures, particularly in harsh environments, due to their high resistance to corrosion, high strength-weight ratio, and excellent fatigue resistance. In practice, FRP can be made with different types of fibers including a glass-fiber- reinforced polymer (GFRP), carbon fiber-reinforced polymer (CFRP), and aramid fiber-reinforced polymer (AFRP) (Wight, 2016).
Flexible Towpregs and Thermoplastic Composites for Civil Engineering Applications
Published in R. Alagirusamy, Flexible Towpregs and Their Thermoplastic Composites, 2022
Nabo Kumar Barman, R. Alagirusamy, S. S. Bhattacharya
Fibre reinforced polymers (FRP) are composite materials with reinforcing fibres/filaments embedded in polymer matrices or resin. The combination of the components leads to superior mechanical properties. The reinforcement component is responsible for mechanical properties and the matrix component acts as a medium for inter fibre load transfer, and provides protection to the reinforcing fibres. FRP composites have a wider application network such as aerospace, automobiles, wind turbines, construction, and structural applications. The application of FRP composites in building construction generally involves high performance fibres such as glass, basalt, carbon, and aramid. The resin component may be thermoset or thermoplastic. The common thermoset resins are epoxy, unsaturated polyester, and vinylester. The popular thermoplastic resins are polypropylene, thermoplastic polyester, nylon, polyether ether ketone (PEEK), and polyether sulfone (PES).
Traditional and Advanced Characterization Techniques for Reinforced Polymer Composites
Published in Shishir Sinha, G. L. Devnani, Natural Fiber Composites, 2022
Amit Pandey, G. L. Devnani, Dhanajay Singh
The flexural testing method is a common practice to test FRP composite materials. The proper loading rate along with a convenient loading fixture is used to test the specimen. It's a very common practice to determine the strength and modulus of FRP laminate composites. Stress distribution gets complex during flexural loading. Hence, it gets a little difficult to determine the mechanical properties using this method. This testing method for determination of flexural properties of PMC is standardized as per ASTM D7264/D7264M-15 (ASTM, 2015).
A review on condition assessment technologies for power distribution network infrastructure
Published in Structure and Infrastructure Engineering, 2023
Sahan Bandara, Pathmanathan Rajeev, Emad Gad
Except wood, different alternate materials like steel, concrete and fibre-reinforced polymer (FRP) are explored to be used as cross-arms. Davidson (2002) investigated the use of FRP for utility structures such as poles and cross-arms. FRP as a material was identified to have numerous advantages such as light weight, high strength to weight ratio, corrosion and weather resistance, low thermal conductivity, durability, and many more. The manufacturing processes of FRP structural components were investigated in this study and it was noted that the degree of automation in commercial manufacturing processes control the production cost. Zhu and Schoenoff (2018) explored the effects of natural sunlight on FRP cross-arms. Accelerated outdoor weathering tests were conducted on different types of FRP cross-arms to investigate the effects of ultraviolet (UV) radiation from natural sunlight over the service life of cross-arms. In most of the FRP cross-arms, synthetic veils and UV inhibitors are formulated to the resin to minimise the effects of weathering. Accelerated weathering test results indicated that the cross-arms with protective UV coating have a better resistance to weathering, whereas the other cross-arms showed rough surfaces with fibre blooming when analysing the surface.
Effect of stress-strain models and sectional analysis methods on the axial-flexural interactions of discontinuously FRP strengthened square RC columns
Published in Structure and Infrastructure Engineering, 2022
Anh Duc Mai, M. Neaz Sheikh, Muhammad N. S. Hadi, Anh Duc Pham, Ngoc Tri Ngo
Fibre reinforced polymer (FRP) has been widely used in the construction industry for the construction of new composite structures (e.g. concrete-filled FRP tubes and double-skin tabular columns) (Yu, Zhang, Huang, & Chan, 2017; Zhao, Ren, & Remennikov, 2021) and strengthening of existing RC structures (Baji, Yang, & Li, 2018; Eljufout, Toutanji, & Al-Qaralleh, 2021). The wide application of FRP in the construction industry has resulted from the superior engineering properties of FRP (e.g. high stiffness, high strength to weight ratio and free from corrosion) and the fast and easy construction of FRP (Li, Liu, Wang, & Su, 2021; Shannag, Al-Akhras, & Mahdawi, 2014). For strengthening/retrofitting RC columns, the FRP fibres are usually wrapped in the transverse direction of the columns as a jacket (Teng & Lam, 2004; Yang, Wang, & Wang, 2018). The lateral confinement generated by the FRP jacket prevents the lateral expansion of the concrete core and eventually enhances the load-carrying capacity and ductility of RC columns (Qiu, Zhou, & A, 2021; Wang, Wang, Smith, & Yu, 2016).
A comparative study on hybrid fatigue stress-life model of RC beams strengthened with NSM CFRP
Published in Mechanics Based Design of Structures and Machines, 2022
Many researchers around the world have been interested in the use of FRP materials in construction over the last few decades. The existing FRP materials include carbon fiber reinforced polymer (CFRP), aramid fiber reinforced polymer (AFRP), glass fiber reinforced polymer (GFRP), and basalt fiber reinforced polymer (BFRP). FRP materials are available in different forms, including laminates (sheets or plates), rebars/rods, grids, and cables (Hu, Li, and Yuan 2020). FRP composites consist mainly of fiber and matrix phase materials such as epoxy, vinyl esters, and polyester resin. The typical applications of FRP composites in strengthening structural RC elements include externally bonded (EB) FRP laminates, externally bonded reinforcement on grooves (EBROG), near-surface mounted FRP bars/strips (NSM), embedded FRP bars (embedded), and mechanical anchorage (MA) techniques (Li, Zhou, and Ou 2021).