摘要
通过对钢筋中心拔出试验结果的比较,研究了钢筋表面特征对活性粉末混凝土钢筋粘结性能的影响。研究表明:相同直径和埋长条件下变形钢筋在滑移量大于0.05mm后粘结应力快速提高,两类钢筋的粘结应力滑移曲线分别在0.50mm和0.35mm时趋于平缓;同直径条件下钢筋的平均极限粘结应力τu均随钢筋粘结长度的增加而降低,且变形钢筋的降幅大于光圆钢筋;两类钢筋锚固长度均随钢筋直径的增加而增大,但是变形钢筋的锚固长度较之光圆钢筋小很多,只有光圆钢筋的0.36倍。
This paper aims to clarify the effect of steel reinforcement surface characteristics on the bond performance of Reactive Powder Concrete through the results of pull-out test. It is concluded that, with the same diameter and bond length, stress-slip curve of deformed bar tends to be gently when s = 0.50mm while the round steel bar is s = 0.35mm. The mean ultimate bond stress τu decreased with the increase of bond length in case of the same diameter, but the range of deformed steel bar is larger than that of the round steel bar. The anchorage length increased with the increase of the diameter, but deformed bar is much lower, only 0.36 times of round bar.
出处
《低温建筑技术》
2010年第2期13-15,共3页
Low Temperature Architecture Technology
关键词
活性粉末混凝土
钢筋类型
粘结性能
锚固长度
Reactive Powder Concrete
steel type
bond performance
anchorage length
