| Reinforcing concrete column under damage of cyclic load and freeze-thaw is the key to ensure its’ long-term safe usage. In this paper, studying on axial compression performance and fatigue performance of concrete column strengthened with basalt fiber under static load, fatigue load, coupling of fatigue load and freeze-thaw temperature field. The main research work and results are as follows:With reference of axial compression experiment of concrete column strengthened with basalt fiber, analyzing axial compression performance of concrete column strengthened with different layers basalt fiber by large general software ABAQUS buckling analysis module. Verifying rationality of finite element model,obtaining bearing capacity and deformation performance of concrete column strengthened with different layers basalt fiber.Determining the maximum and minimum fatigue corresponding stress based on analysis of load bearing capacity of concrete column with different layers basalt fiber.Analying 12 finite element model with different reinforcement layers by fatigue analysis of ABAQUS. Obtaining fatigue life of different reinforced condition, giving adivices about fatigue performance of concrete column strengthened with basalt fiber,fitting S -N curve and obtaining S -lg N fatigue life equation.Establishing 12 models of thermal mechanical coupled analysis of concrete column strengthened with basalt fiber, studying on fatigue properties of concrete columns without basalt fiber under freeze-thaw temperature field. Obtaining fatigue life of concrete columns strengened with basalt fiber undero20 C ®-o20 C ®o20 C temperature cycling, fitting S -N curve and obtaining S -lg N fatigue life equation. Putting forward advices about coupling of temperature-fatigue stress of concrete colums strengthened with basalt fiber comparated with analysis of the fatigue performance of concrete columns with different fiber layers. |
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