锈蚀HRB500钢筋混凝土板抗弯性能试验研究

采用通电方式对配置HRB500级钢筋和普通钢筋的混凝土板进行加速锈蚀，并对锈蚀钢筋混凝土板进行抗弯承载力试验研究. 对比分析了不同锈蚀程度下钢筋混凝土板的破坏形态、抗弯承载能力、荷载-挠度曲线. 同时，通过试验研究了锈蚀钢筋受拉性能和黏结性能随锈蚀程度不同的变化规律. 考虑板内不同锈蚀程度的钢筋可能发生受拉屈服或黏结滑移破坏，提出锈蚀钢筋混凝土板抗弯承载力计算方法. 经过对比分析，试验结果与计算模型吻合良好，锈蚀板抗弯承载力计算值与试验值之比的平均值为1.019，标准差为0.081.

Experimental Study on Flexural Behavior of Corroded Reinforced Concrete Slabs with HRB500 Bars

The reinforced concrete slabs using HRB500 rebar and ordinary steel rebar were corroded by artificial accelerated method, and four-point bending test was applied on these corroded slabs. The failure modes, flexural capacity, load-deflection curves of the slabs were analyzed by comparing test specimens under different corrosion degree. This study further investigated the relationship between corrosion ratio and deterioration of tensile capacity and bond behavior of corroded steel. Considering the occurrence of reinforcement yielding and bond-slip due to different corrosion degree, a calculation method of flexural bearing capacity of corroded reinforced concrete slab was proposed. A good agreement between calculated values and tested results of the corroded reinforced concrete slab was achieved. The average ratio of calculated values to test results was 1.019, and the standard deviation was 0.081.