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冻融在造成混凝土物理力学性能变化的同时,势必改变混凝土与钢筋之间的黏结性能。利用C30、C40、C50三种混凝土强度中心短埋试件单调和往复荷载试验,研究冻融损伤对混凝土与光圆钢筋黏结应力-滑移曲线的影响,分析单调荷载下峰值黏结应力、峰值滑移和残余黏结应力的变化规律,探讨往复荷载作用下峰值黏结退化率与加载循环次数之间的关系。
Freezing and thawing in the physical and mechanical properties of concrete caused by changes in the same time, bound to change the bonding properties between concrete and steel. The monotonous and reciprocating load tests of short-time specimens C30, C40 and C50 were carried out to study the influence of freeze-thaw damage on the bond stress-slip curves of concrete and smooth steel. The peak stress-slip and peak slip Migration and residual bond stress variation law to explore the reciprocal load peak bond degradation rate and the relationship between loading cycles.