CFRP筋增强混凝土轴心受压柱的试验研究

EXPERIMENTAL RESEARCH OF THE AXIAL COMPRESSION CONCRETE COLUMNS REINFORCED WITH CFRP

通过对5根CFRP筋混凝土矩形柱的轴心受压试验,研究这种新型混凝土柱的受力特点,重点分析CFRP纵筋的配筋率及CFRP箍筋间距对柱承载力的影响。试验结果表明:CFRP筋混凝土轴心受压柱首先发生混凝土压碎破坏,在混凝土被压碎之后如继续加载,则CFRP箍筋或纵筋可能发生破裂或破断。CFRP纵筋对其承载力提高有一定的贡献,但可利用的强度有限;CFRP箍筋间距较密时,对承载力有利,但当超过一定范围后,对承载力的影响可以忽略。

The axial compression characteristics are studied in the experiments of five CFRP tendons reinforced concrete columns. The influences of the distance between CFRP hoops and the contributions of CFRP tendons on the bearing capacity of the columns were researched in the experiments. The test results indicate that the concrete will be crushed in first under axial compression,and the CFRP tendons or CFRP hoops are likely to be destroyed if the compression force continues to increase. CFRP tendons are helpful to bearing capacity,and CFRP hoops are helpful to bearing capacity when the distance between CFRP hoops is small. But the effect of CFRP hoops on bearing capacity can be ignored if the distance between CFRP hoops exceeds a limit.