组合楼板抗弯承载力研究

Study on Bending-Resist Bearing Capacity of Composite Floor

为研究压型钢板-混凝土粘结成整体的组合楼板共同受力时,特定型号的压型钢板及配筋条件下混凝土组合楼板的抗弯承载能力,依据试验现象分析,确立了简化的破坏模式.对简化破坏模式进行了受力分析,并利用虚功原理推导出组合楼板的抗弯承载力设计表达式,给出了试验采用的压型钢板-混凝土组合楼板的抗弯承载力计算公式.研究表明:压型钢板-混凝土组合楼板的抗弯承载力和压型钢板、配筋相关,压型钢板-混凝土组合楼板的工程设计应考虑压型钢板、受力钢筋的贡献.

To study the bending-resist bearing capacity of such composite floor with specified shape of profiled steel sheeting and reinforcement in concrete when the profiled steel sheeting and concrete of the composite floor are both working jointly, failure states and stress analysis are made according to reductive failure mode by virtue of tests. Thus, based on virtual-work principle, an expression of bearing capacity is found for more economical structure designing. The formula to calculate the load capacity was made according to the tests. It revealed that the bending-resist bearing capacity of composite floor relate to the conditions of profiled steel sheeting and reinforcement in concrete, and the design of such composite floor shall take account of the profiled steel sheeting and reinforcement.