纤维布加固混凝土梁的疲劳损伤研究

Study on fatigue damage of FRP reinforced concrete beam

采用损伤理论建立了疲劳荷载作用下混凝土基体、钢筋以及纤维布材料的损伤模型和破坏准则,并利用分段性原理,对碳纤维布加固梁的疲劳损伤进行非线性计算,从而得到加固梁的疲劳寿命和破坏形式。计算结果与试验结果相近,表明该损伤模型及其计算方法的科学性。

The damage constitutive model and the fracture criterion for concrete,reinforecing steel bar and the FRP under fatige load were set up by damage thery in this paper,and the fatigue damage of he CFRP reinforced concrete beam was calculated based on the theory of subsectio,then the fatige life and failure model were gained.The results of calculation are close with those of the experiment and this shown the damge model and this ways is feasible.