Punching shear capacity of deteriorated reinforced concrete slab is experimentally investigated in this study. Since horizontal crack near the upper side rebar is often observed in deteriorated reinforced concrete bridge deck slabs due to rebar corrosion, horizontal crack propagation behavior was investigated by accelerated electric corrosion test. Then, in order to evaluate the influence of the horizontal crack on punching shear capacity of slabs, loading tests were carried out using the test specimens with the corrosion‐induced crack and with an artificial horizontal crack. According to the test results, the horizontal crack near the upper side rebar has a significant impact on punching shear capacity of slabs, and it is confirmed that punching shear capacity of reinforced concrete slab correlates to the width of the horizontal crack. Also, it is revealed that cover concrete above horizontal crack does not effectively work if width of the horizontal crack grows to a certain amount.

中文翻译：

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受压钢筋腐蚀引起水平裂缝的钢筋混凝土板冲切承载力的试验评估

本研究通过实验研究了劣化钢筋混凝土板的冲切剪切能力。由于钢筋腐蚀引起的钢筋混凝土桥梁桥面薄板经常在上部钢筋附近观察到水平裂纹，因此通过加速电腐蚀试验研究了水平裂纹的扩展行为。然后，为了评估水平裂纹对平板冲切剪切能力的影响，使用了带有腐蚀诱发裂纹和人造水平裂纹的试样进行了载荷测试。根据试验结果，上侧钢筋附近的水平裂缝对板的冲切剪切能力有显着影响，可以确认钢筋混凝土板的冲切剪切能力与水平裂缝的宽度有关。也，