纤维增强复合材料缠绕管桩弯曲冲击吸能试验与模拟

Composite material fiber reinforced polymer (FRP) has advantages of higher specific strength, excellent corrosion resistance and flexible designability. Here, to solve the problem of bridge-ship collisions, FRP wrapped pipe pile was proposed to resist ship collisions. Bending impact tests were conducted by changing pipe pile wall thickness, fiber winding angle and impact energy of pipe pile, and specimens' failure mode, dynamic time history response, and energy dissipation in impact process were analyzed contrastively. The results showed that fiber winding angle can change failure modes of specimens, specimens with winding angle of ± 75° have shear failure, while specimens with winding angle of ± 45° only have local damage in impact area and can recover deformation; increasing pipe pile wall thickness can effectively reduce specimen' s deformation, but impact force peak value can increase accordingly; the software ANSYS/ LS-DYNA is used to establish the impact test model for finite element simulation, the numerical simulation results agree better with test values.