加载速率对侧压力下光圆钢筋与混凝土粘结性能的影响

摘要

为了研究加载速率对在不同侧向压力作用下光圆钢筋与混凝土间粘结性能的影响，采用30个拉拔试件研究了加载速率对粘结滑移曲线及粘结参数的影响。试验结果表明，加载速率对粘结性能的影响，取决于侧向压力的大小。当无侧向压力时，粘结性能与加载速率的大小无关。当侧压一定时，随着加载速率增加，粘结强度和残余强度上升，但极限粘结应力对应的滑移量下降。%In order to study the influence of loading rate on the bond behavior between plain round bars and concrete under lateral pressure ,a total of 30 pull‐out specimens were tested to investigate the effect of the loading rate on the bond slip curves and bond parameters .The experimental results showed that the influence of loading rate on bond behavior depending upon the value of lateral pres‐sure .When no lateral pressure is applied ,the bond behavior is insensitive to the loading rate .Howev‐er ,for a given lateral pressure ,the ultimate and residual bond strengths increase but the slip at the peak bond stress decreases with the increase of the loading rate .