【作者】 韩向丽； 赵均海； 魏雪英； 张冬芳；

【Author】 HAN Xiang-li ZHAO Jun-hai WEI Xue-ying ZHANG Dong-fang (School of Civil Engineering,Chang’an University,Xi’an 710061.China)

【机构】 长安大学建筑工程学院；

【摘要】 本文基于双剪应力三参数破坏准则对钢筋混凝土板的冲切承载力进行了分析。考虑了钢筋和板的抗弯承载力对冲切承载力的影响,采用刚塑性模型,确定出轴对称条件下的冲切破坏面,推导了钢筋混凝土板的冲切承载力计算公式。该公式考虑了混凝土材料中间主应力的影响、双轴等压强度大于单轴抗压强度的特性,更符合实际情况,利用本文推出的公式计算的材料内摩擦角与试验均值基本一致。并将本文的理论计算结果与试验结果进行了比较,符合较好。更多还原

【Abstract】 The UPS(ultimate punching strength) of the reinforced concrete slab is analyzed in this paper based on the twin shear three-parameter strength theory.The problem is treated as a three-dimensional axisymmetrical one, the material being assumed to be rigid-plastic.The formula of the UPS for reinforced concrete slab is derived considering the effects of the steel and the flexural capacity on the UPS.The intermediate principal stress effect and the properties of biaxial compressive strength of concrete are also taken into account in the formula The UPS obtained in this paper shows a good agreement with test data.更多还原