Abstract:

The 12 groups data of pullout model tested are simulated based on the 1-D numerical analysis procedure,by which the basic anchor length of FRP bar was obtained.The evolution trend of the distribution of the FRP bar's interface bond strength in the basic anchor length with the increasing of the pullout stress is analyzed.The inclusion shows that the basic anchor length is seriously affected by residual interface strength.The new formula for calculating the FRP bar's basic anchor length is found.The limit bond strength,residual bond strength,diameter and yield strength are considered as the influencing factors in reference to the new formula.The gathered accuracy of the 1-D calculation's results got from the simplified new formula is very well.

Key words:  1-D numerical analysis, FRP bar, residual interface bond strength, the calculate formula of basic anchor length