预埋钢筋粘结强度理论分析与试验研究

摘要

基于弹性理论模型,建立了钢筋在拉拔力作用下的理论模型,推导了钢筋与周围介质之间的粘结强度与拉拔试验曲线之间的理论关系式.通过理论计算与试验相结合,研究了螺纹钢和圆钢与混凝土之间的粘结强度.结果表明:利用拉拔试验曲线,可以方便地求得钢筋与混凝土之间的粘结强度值,为预埋钢筋的设计和工程应用提供了一定的理论依据.%Based on elasticity theory, the theoretical model of steel bar under the drawing force is established, and the relation is derived between bond strength of pre-embedded steel bar and the pull out test curve. Using theoretical and experimental method, the author analyzed the bond strength between thread /round steel bar and concrete. The results showed that using pull out test curve can easily obtain the bond strength values between steel bar and concrete, and also provide certain theoretical basis for preembedded steel bar engineering.