混凝土楼板受弯承载力的简化计算

Simplified calculation on the capacity of concrete bending slabs

从混凝土受弯构件的基本假定和基本公式出发,推导出采用内力臂系数进行受弯承载力计算的简化公式。经过大量计算,分析了楼板厚度、配筋率、钢筋强度和混凝土强度对内力臂系数的影响。最后,基于在我国混凝土楼板配筋率基本不大于0.6%的情况,建议采用简化公式进行楼板配筋设计时内力臂系数可以取0.9,采用简化公式进行楼板配筋校核时内力臂系数可以取0.95。

In this paper, the simplified formulas of the flexural capacity were deduced by means of internal lever arm coefficient, based on the basic assumptions and equilibrium equations of concrete bending members. The influence of the slab thickness,reinforcement ratio, the strength of the reinforcement and concrete was analyzed. Finally, the suggestions of suitable internal lever arm coefficient were put on condition that the reinforcement ratio of concrete slab was not greater than 0. 6% in China, when calculating the areas of reinforcement and the flexural capacities of concrete slabs.