冻融环境对CFRP加固混凝土梁疲劳性能的影响

Influence of freeze-thaw environment on the fatigue performance of CFRP reinforced concrete beam

通过对碳纤维布加固混凝土梁经过冻融循环作用后的疲劳试验,分析了冻融循环作用以及不同应力水平对碳纤维布加固混凝土梁的疲劳性能影响。试验结果表明:冻融循环环境作用导致破坏荷载明显降低,疲劳次数明显减少;应力水平越高,疲劳次数越小;梁的主要破坏形式是弯曲破坏。

After freeze-thaw cycle effect on the Carbon Fiber-Reinforced Polymer （CFRP） reinforced concrete beams, the fatigue tests under thedifferent stress level were done.Through the fatigue test, a detailed analysis of influence of freeze-thaw cycling action and different stress level on the fatigue performance of CFRP reinforced concrete beam was made.The test results indicate that：Under the action of the freeze-thaw cycleenvironment, both of the failure sustained load and the number of fatigue were significantly reduced;The higher of the stress level,the less of the number of fatigue; CFRP reinforced concrete beams were damaged in the form of bending failure.