基于统计分析的冻融循环作用下钢筋与混凝土粘结强度研究综述

Research review of bond strength between steel bar and concrete in freeze-thaw cycles based on statistical analysis

粘结力的存在是钢筋与混凝土共同发挥作用的基础,而冻融循环作用会对二者的粘结强度产生影响。依据已有的冻融循环作用下钢筋与混凝土粘结强度试验数据,通过拟合公式分别分析了冻融循环次数、混凝土抗压强度、混凝土相对保护层厚度以及钢筋直径对粘结强度的影响。最后建立了一个统一的包括多种影响因素在内的粘结强度预测模型,并通过与实际试验数据相比较发现拟合程度较好。

The existence of bond is the basis for reinforcing bar and concrete to work together,and the freeze-thaw cycles will affect the bond strength of them.According to the existing experimental data of bond strength between reinforcing bar and concrete under freeze-thaw cycles,the influences of freeze-thaw cycles,concrete compressive strength,concrete relative protective layer thickness and reinforcing bar diameter on bond strength were analyzed by fitting formulas.Finally,a unified bond strength prediction model including a variety of influencing factors was established.By comparing with the actual test data,it is found that the fitting degree is better.