Abstract
This paper presents an elastic shear stress distribution theoretical model at the carbon fiber-reinforced polymer (CFRP)-adhesive interface of a single-rod and a multi-rod straight-pipe bonding anchor. A comparison between theoretical and finite element analysis results reveals that the accuracy of the theory can be used to guide the preliminary design of CFRP rod bonding anchors. The mechanical performance of the inner cone bonding anchor for multi-rods are evaluated within different coefficients of friction and inner inclined angles. Numerical results indicate that the straight-parabolic inner cone bonding anchor has a significant effect on reducing the shear force at the loading end.
Highlights
Carbon fiber-reinforced polymer (CFRP) has a high strength, is light weight, with excellent fatigue performance and non-corrosive properties and is, widely used in the structures of buildings and bridges in various forms
The section of a carbon fiber-reinforced polymer (CFRP) rod by scanning electron microscope (SEM) in Figure 1b shows that the unidirectional fibers are embedded in the polymer resin
The bond-slip relationship between the CFRP rod and the cement grout was investigated [13,14], and the results revealed that the surface condition of the rod, the expansion of the cement grout, the anchorage length and the elastic modulus of the barrel can influence the anchorage performance to different degrees
Summary
Carbon fiber-reinforced polymer (CFRP) has a high strength, is light weight, with excellent fatigue performance and non-corrosive properties and is, widely used in the structures of buildings and bridges in various forms. A cable composed of CFRP rods, as shown, is made up of unidirectional carbon fibers and the epoxy resin, manufactured by the pultrusion process. The specific strength of the CFRP cable is fairly high compared to that of a steel cable, while the density of CFRP is one-fourth that of steel. This makes it more suitable for large-span structures, such as large-span roof systems [1,2,3] and cable-stayed bridges [4,5]. The corrosion of steel cables in the long run can be avoided by using CFRP cables
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