摘   要：通过对钢筋混凝土板受剪试验结果的研究，分析了宽跨比对集中荷载下无腹筋板破坏形态和受剪承载力的影响。研究表明，随着宽跨比的增加，板的破坏形态由梁剪、冲剪变化到冲切，并建议了相应的受剪承载力计算方法，该方法计算值与试验结果能较好地符合。研究成果可供工程设计及修订规范参考。

Abstract: According to the experimental results of reinforced concrete slabs under shearing capacity, the influences of breadth span ratio on the failure mode and shearing capacity of slabs without web reinforcement under concentrated loading are analyzed. The results show that with the increments of breadth span ratio, the failure mode of reinforced concrete slabs translates from beam shearing to punching shearing. Furthermore, the formulas for calculating the shearing capacity of reinforced concrete slabs are put forward. The calculated results are in good agreement with the experimental ones. The suggested formulas have fairly good practical value and can be used as the reference to the revision of the concrete specification in the future.