Study on Bond Anchorage Behavior of Small-Diameter Rebar Planting under Medium and Low Cycle Fatigue Loads

In this paper, we describe how, through the combination of field testing and finite element simulation, bonding anchoring performance small-diameter rebar under action medium low cycle fatigue load was studied corresponding conclusions were obtained: ① Through test, parameters 6 mm 8 planting specimens obtained after subjected to 10,000, 50,000 100,000 times loading at depths 10d, 15d 20d. The analysis shows that has a significant effect on elastic ultimate load, slip specimens. With increase in times, specimen decreased continuously, showed an increasing trend. By anchor depth, influence can be reduced. Under upper condition loading, failure mode planted bars basically did not change compared with control without loading. ② Based from bond–slip constitutive relationship adhesive–rebar interface is analyzed proposed. F-U spring defined simulate behavior interface. simulation results are good agreement test results. ③ large number numerical results, calculation formulas diameter loads obtained.