碳纤维筋锚固性能试验研究

EXPERIMENTAL INVESTIGATION ON THE ANCHORAGE PERFORMANCE OF CFRP BARS

为了改善CFRP筋粘结型锚具的锚固性能,通过静载试验研究了粘结介质、CFRP筋不同表面形状、锚固长度、锚固端处理方式对锚固性能的影响。结果表明,在其它条件相同的情况下,环氧结构胶对CFRP筋的锚固性能较好,膨胀混凝土较差;CFRP筋的表面形状显著影响其锚固性能;CFRP筋锚固端环氧胶膜粘石英砂对锚固性能最好,环氧树脂粘砂次之,打磨处理最差;5mm和7mm光圆筋,建议进行环氧胶膜粘砂,锚固长度为250mm时,锚固效果最佳;8mm和16mm螺纹筋,环氧树脂粘砂,在锚固长度为250mm、330mm时,可使材料充分发挥性能。

In order to improve the performance of bond-type anchorage systems for CFRP bars,the influence of bonding medium,different surface shape of CFRP bars,anchor length,anchor end treatment on the anchorage performance are studied by static test. Test results show that epoxy structural adhesive anchorage properties of CFRP bars is better and expansion concrete is poor in the same situation. The surface shape of CFRP bars is significant to the anchorage performance. Further,the anchorage performance of epoxy film adhering sand is the best and polishing processing is the worst. 5mm and 7mm light round bars are recommended epoxy film adhesive sand. When anchoring length is 250 mm,anchorage performance is the best. For 8mm and 16 mm threaded bars,when epoxy sticky sand,anchoring length of 250 mm and 330 mm,it can give full play to the performance of the material.