中文摘要：

通过54个立方体中心拉拔、6个立方体偏心拉拔、1个棱柱体中心拉拔、1个板式中心拉拔共计72个拉拔试件，研究高强钢筋与活性粉末混凝土（RPC）的黏结性能，包括极限拉拔荷载、极限黏结应力、自由端初始滑移荷载、峰值荷载对应的自由端滑移量与荷载一滑移全曲线等。探讨钢筋埋长、保护层厚度、钢筋直径、活性粉末混凝土强度变化、钢纤维掺率等因素对黏结性能的影响规律。研究表明：①钢筋埋长增加，极限拉拔荷载与自由端初始滑移荷载增加，极限黏结应力与峰值荷载对应滑移量减小；埋长从3d增加到4d，荷载过峰值后下降变快，然后荷载又逐渐上升；埋长增加到5d、6d时，钢筋被拔断。②保护层厚度增加，极限拉拔荷载、极限黏结应力、自由端初始滑移荷载、峰值荷载对应滑移量均增加，曲线下降段变缓。③RPC强度增加，极限黏结应力与初始滑移荷载增加，荷载过峰值后下降变快，在最高强度H3型RPC试件中，荷载下降后又上升，钢筋拔出过程变快。④钢筋直径、钢纤维掺率增加，曲线下降段变缓。⑤高强钢筋与RPC黏结性能良好。在试验的基础上确定试验测定黏结强度的合理埋长，建立计算临界锚固长度的公式，拟合极限黏结应力与保护层厚度、相对埋长之间的关系式。

英文摘要：

A pull-out test was conducted on 72 different specimens with 54 cubic specimens for axial pullout test, 6 cubic specimens for eccentric pullout test and 6 plate-type for axial pullout test, to investigate bonding properties between high strength rebar and reactive powder concrete. The influence laws of buried length, concrete protection layer thickness, rebar diameter, strength of reactive powder concrete and steel fibre content on bonding properties are discussed. The test results show that with the increase of rebar buried length, the ultimate pullout load and free end initial slip load increase, the ultimate bond stress and the slip at peak load decrease. When buried length increases from 3d to 4d, load declines rapidly after peak load but rise thereafter. When protectoin layer thickness increases, ultimate pullout load, ultimate bond stress, free end of the initial slip load, slip at peak load increase, and the decreased segment of the curve becomes gentle. When RPC strength increase, ultimate bond stress and initial slip load increase, but load declines faster after peak load. For the highest strength H3 RPC specimens, load decrease first and then increase with rebar pull out process becoming faster. When rebar diameter and steel fiber content increases, the curve＇ s decrease segment becomes gentle. Based on the experiment results, a suitable buried length of rebar for the determination of bond strength is obtained, a formula for calculating critical anchorage length is suggested, and the relationship between the test parameters and ultimate bond stress is concluded.