Deflection of Steel Reinforced Concrete Beam Prestressed With CFRP Bar

Abstract

Carbon Fiber Reinforced polymer (CFRP) bars are weak in yielding property which results in sudden failure of structure at failure load. Inclusion of non-pretensioned steel reinforcement in the tension side of CFRP based prestressed concrete beam will balance the yielding requirements of member and it will show the definite crack failure pattern before failure. Experimental investigation has been carried out to study the deflection behavior of partially prestressed beam. Experimental works includes four beam specimens stressed by varying degree of prestressing. The Partial Prestressing Ratio (PPR) of specimen is considered for experimental works in the range of 0.6 to 0.8. A new deflection model is recommended in the present study considering the strain contribution of CFRP bar and steel reinforcement for the fully bonded member. New deflection model converges to experimental results with the error of less than 5% .

Plastic Properties of Prestressed High-Strength Steel Reinforced Concrete Continuous Beams

“…Scholars [19][20][21][22] have also studied the plastic properties of PSRC beams and proposed the amplitude of bending moment modulation. In addition, some scholars [23][24][25][26][27][28][29] analyzed the failure mode, crack development, and stiffness change of PSRC members and explored the deformation capacity of PSRC beams based on the stiffness change of the section. Based on the study of the deformation capacity of PSRC beams, scholars from various countries [30][31][32][33] studied the seismic performance of PSRC frames and analyzed the formation position and rotation ability of plastic hinges in PSRC frames.…”

Study on crack width and crack resistance of eccentrically tensioned steel-reinforced concrete members prestressed by CFRP tendons

“…Fibre-reinforced polymer (FRP) composites have been shown to inhibit crack generation and development, structural reinforcement, and material corrosion resistance [23][24][25][26][27][28]. To promote the application of SRC structures in China, a prestressed steel reinforced concrete (PSRC) structure with CFRP prestressed tendons was proposed by the authors as an alternative to the SRC columns (Fig.…”

Research on strengthening stone arch bridge with CFRP rebars

“…Therefore, it is necessary to study a kind of reinforcement technology based on high strength, light weight and corrosion resistant materials, which is economical and convenient for construction and has little impact on traffic operation. In recent years, in Europe, America, Japan, South Korea and other developed countries, relevant professionals began to carry out a wide range of research on the application of carbon fiber reinforced plastics (CFRP) in bridge reinforcement and reinforcement, especially the American Society of Civil Engineering has formulated relevant technical guidelines, providing powerful technical support for CFRP reinforcement of bridge structures (Wang et al , 2020; Yang et al , 2014; Selvachandran et al , 2017).…”