钢筋混凝土板的极限承载力计算

Calculation of limit carrying capacity of reinforced concrete slabs

摘要:

为了准确地确定钢筋混凝土板的承载能力,在塑性铰线理论基础上,考虑薄膜效应的影响,提出板的破坏准则,利用板块平衡法对板的极限承载力和位移进行计算,并将计算结果和试验结果进行对比．结果表明:极限承载力计算值与试验结果吻合较好;与试验极限位移相比,计算极限位移值相对保守．通过力学分析,解释了在相同挠度下方板极限承载力小于矩形板的破坏机理．

Abstract:

To accurately determine the bearing capacity of reinforced concrete slabs, based on the yield hinge line theory and segment equilibrium method, this paper presents two failure criteria to determine the limit carrying capacity and displacement of the slabs, which consider the membrane effect. The calculated results were compared with the test results. The results show that the calculated limit carrying capacity of the slab is agreement with the test result, and the calculated limit displacement is relatively conservative compared with the experimental result. According to the mechanical analysis, the model explains the failure mechanism that the limit carrying capacity of the square slab is lower than that of the rectangular slab under the same deflection.