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关于钢筋混凝土板在压缩薄膜效应阶段的变形性能的研究,开展得较为有限.基于压缩薄膜效应的受力机理及大变形状态下的几何条件,提出了一种考虑压缩薄膜效应钢筋混凝土单向板变形能力的计算方法:将压缩薄膜效应阶段钢筋混凝土板的变形性能区分为弯曲效应和附加三铰拱效应分别考虑,采用有效刚度法计算弯曲效应下的荷载-挠度关系,根据试件的大变形条件建立三段式的附加承载力-挠度关系,两条曲线叠加从而获得压缩薄膜效应阶段试件的荷载-挠度关系曲线.通过一组剪力墙约束钢筋混凝土单向板的试验,对该计算方法进行验证.试验结果表明:计算结果与试验结果的误差较小,考虑支座对中间板带的弯曲约束程度的影响,该方法可用于考虑压缩薄膜效应钢筋混凝土板的变形分析.
The research on the deformation behavior of reinforced concrete slab during the compressive film effect stage is relatively limited.According to the mechanical mechanism of compressive film effect and the geometric conditions under large deformation, Deformation capacity of the calculation method: the compression film effect phase reinforced concrete plate deformation performance is divided into bending effect and additional three-hinge arch effect were considered, using effective stiffness method to calculate the load-deflection relationship under bending effect, according to the large deformation of the specimen The relationship between the load-deflection curve and the load-deflection curve of the compression-thin-film effect stage was obtained.According to the test of a set of shear wall constrained reinforced concrete one-way slab, this calculation The experimental results show that the error between the calculated result and the experimental result is small, and the influence of the bearing on the bending restraint degree of the middle strip is considered. This method can be used to analyze the deformation of reinforced concrete slab with compressive film effect.