针对钢绞线与混凝土的拉拔试验中,由于钢绞线的特殊构造不能开槽内贴应变片测量两者间局部粘结力的问题,建立了由拉拔端整体滑移理论的推导局部粘结滑移的方法。该方法借助微元法思想,通过将混凝土梁划分成有限单元,以修正的带未知变量的局部粘结滑移模型(CEB Model Code 90)为基础建立理论推导局部拉拔力的过程,并与实际拉拔试验相结合,确定模型中的未知变量,推导局部粘结滑移。结果表明:模型中最大粘结力对应的滑移量n和开始进入残余段粘结力对应的滑移量m的值分别取0.7,1.7 mm时,理论推导的拉拔力和实际测得的数据误差在5%以内,具有较好的吻合性。 In the drawing test of steel strand and concrete, due to the special structure of steel strand can not be slotted within the strain gauge to measure the local adhesion between the two problems, established by drawing the overall slip of the theory of derivation of the local Bonding slip method. Based on the idea of ​​the micro-element method, this method is based on the modified CEB Model Code 90, which is based on the revised theory of derivation of local pulling force by dividing the concrete beam into finite elements. The actual pull test combined to determine the unknown variables in the model to derive the local bond slip. The results show that when the value of slip n corresponding to the maximum bond force and the slip value m corresponding to the initial cohesion of the residual segment are taken as 0.7 and 1.7 mm, respectively, the theoretically derived drawing force and actually measured Data error within 5%, with good agreement.