黏FRP加固钢筋混凝土梁在屈服时和屈服后拉断时2种状态下正截面受压混凝土尚未压坏,作者对其合力大小及位置进行了简化,给出了相应的弯矩特征值近似公式。研究结果表明,其计算结果与试验结果吻合良好。提出了以抵抗FRP拉断为目标的抗弯加固设计简化计算方法。
For RC beams strengthened with bonded FRP reinforcement,compressed concrete on cross section is not crushed in the states of both rebar yielding and FRP rupturing after the rebar yield.The resultant force of compressed concrete and its location were simplified in this paper.Then approximate expressions were proposed to calculate the bending moments in both states above mentioned.The results show that the predictions of the simplified procedures agree well with the experimental values.In addition,a simplified design method was presented for the FRP-strengthened RC beams to resist rupture of FRP.