低周反复荷载作用下CFRP-PCPs复合筋混凝土梁挠度和延性试验研究

Experiment study on deflection and ductility of concrete beams of CFRP-PCPs composite tendons under low cyclic loadings

基于5根不同张拉控制应力和不同截面面积的CFRP-PCPs复合筋的混凝土梁在低周反复荷载下的试验,对CFRP-PCPs复合筋混凝土梁挠度进行研究,根据试验结果,提出了CFRP-PCPs复合筋混凝土梁挠度计算方法,对比表明试验结果与计算值吻合较好。试验表明,CFRP-PCPs复合筋混凝土梁相比于预应力CFRP筋混凝土梁,有效改善了构件的受力性能和变形能力。

Based on different tension control stress and different cross-sectional dimension of CFRP-PCPs composite reinforced con-crete beams,cyclic loading were tested on five concrete beams.Deflection of composite reinforced concrete beams of CFRP-PCPs is inves-tigated.According to the experimental results,a deflection expression is put forward.Comparison with experimental results showed reason-able matching the calculated values.The experimental results show that compared with the concrete beams of prestressed CFRP tendons , the concrete beams of CFRP-PCPs composite tendons effectively improves the structure of the force performance and deformation capacity.