(1 湖南大学土木工程学院， 长沙 410082； 2 中国建筑设计研究院， 北京 100044)

［摘要］收集整理了国内外钢筋混凝土板受冲切破坏的试验数据。通过回归分析，推导出了考虑混凝土强度、纵筋配筋率及屈服强度、临界截面位置、板有效高度和板厚尺寸效应等影响因素的钢筋混凝土板受冲切承载力计算公式，并与我国规范公式、美国规范公式、欧洲规范公式进行了比较，结果表明总体上由试验数据所得到的回归公式与欧洲规范公式接近。从可靠度校准的角度，分析对比了我国规范和美国规范中钢筋混凝土板的受冲切承载力，并与无腹筋梁、板的受剪承载力进行比较，发现我国规范中基础板受冲切承载力和无腹筋梁、板受剪承载力计算公式的可靠指标相对偏低；无腹筋板受冲切承载力的可靠度水平总体上低于其轴心受压、轴心受拉和受弯承载力的可靠度平均水平。最后，给出了我国规范公式修订的建议。

［关键词］钢筋混凝土; 受剪承载力; 受冲切承载力; 可靠度

中图分类号：TU375.2        文献标识码：A        文章编号：1002-848X(2014)14-0001-08

Reliability analysis of punching shear capacity of reinforced concrete slabs

Yi Weijian1, Yang Kai2

 (1 College of Civil Engineering, Hunan University, Changsha 410082, China; 2 China Architecture Design & Research Group, Beijing 100044, China)

Abstract: Punching test data of reinforced concrete (RC) slabs from home and abroad were collected. Based on the regression analysis, punching shear capacity formulas of RC slabs were derived, in which the concrete strength, steel reinforcement ratio and yield strength, location of critical perimeter, slab effective depth and size effect of slab depth were introduced. It is shown that the regression equations are generally close to Europe code equations by comparing with the punching shear capacity equations in Chinese, American and Europe code of RC slabs. From the view of reliability index calibration, punching shear capacity of RC slabs between Chinese code and American code were analyzed and compared. By comparing the punching shear capacity with shear capacity of beams and slabs without stirrups, it is indicated that the reliability index of the punching shear capacity formula of footing slabs and the shear capacity formula of beams and slabs without stirrups are comparatively low for Chinese code. The reliability level of punching shear capacity of slabs without stirrups is lower than the average reliability level of compression, tension and bending carrying capacity. Finally, some suggestions for the revision of punching shear capacity formula in Chinese code were proposed.

Keywords: reinforced concrete; shear capacity; punching shear capacity; reliability

*国家自然科学基金项目资助（51178175，51338004）。

作者简介：易伟建，博士，教授，Email：wjyi@hnu.edu.cn。

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