This article proposes a new type of discrete connected precast reinforced concrete diaphragm floor system that consists of precast flat slabs and slab joint connectors. An experimental investigation of discrete connected new-type precast reinforced concrete diaphragm under a vertical distributed static load was conducted, and the effect of slab joint connectors on the load-bearing capacity was evaluated. Then, a finite element analysis of discrete connected new-type precast reinforced concrete diaphragm, precast reinforced concrete floors without slab connectors, and cast-in-situ reinforced concrete floor were performed to understand their working mechanism and determine the differences in load-bearing behavior. The results indicate that the load-bearing capacity and stiffness of discrete connected new-type precast reinforced concrete diaphragm increase considerably as the hairpin and cover plate hybrid slab joint connectors can efficiently connect adjacent precast slabs and enable them to work together under a vertical load by transmitting the shear and moment forces in the orthogonal slab laying direction. The deflection of discrete connected new-type precast reinforced concrete diaphragm in orthogonal slab laying direction is mainly caused by the opening deformation of the slab joint and the rotational deformation of the precast slabs. This flexural deformation feature can provide reference for establishing the bending stiffness analytical model of discrete connected new-type precast reinforced concrete diaphragm in orthogonal slab laying direction, which is vitally important for foundation of the vertical bearing capacity and deformation calculation method. The deflection and crack distribution patterns infer that the discrete connected new-type precast reinforced concrete diaphragm processes the deformation characteristic of two-way slab floor, which can provide a basis for the theoretical analysis of discrete connected new-type precast reinforced concrete diaphragm.

中文翻译：

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离散连接新型预制钢筋混凝土楼板系统竖向承载性能试验与数值研究

本文提出了一种由预制平板和板节点连接件组成的新型离散连接预制钢筋混凝土隔板楼盖系统。对垂直分布静荷载作用下离散连接的新型预制钢筋混凝土隔板进行了试验研究，并评估了板节点连接件对承载能力的影响。然后，对离散连接的新型预制钢筋混凝土隔板、无板连接件的预制钢筋混凝土楼板和现浇钢筋混凝土楼板进行有限元分析，以了解它们的工作机制并确定其承载行为的差异。 . 结果表明，离散连接的新型预制钢筋混凝土隔板的承载能力和刚度显着增加，因为发夹和盖板混合板接头连接件可以有效地连接相邻的预制板，并使它们在垂直荷载下共同工作在正交的板坯铺设方向上传递剪力和力矩。离散连接的新型预制钢筋混凝土隔板在正交板铺设方向的挠度主要是由板节点的开口变形和预制板的旋转变形引起的。该弯曲变形特征可为建立正交板条铺设方向离散连接新型预制钢筋混凝土隔板抗弯刚度分析模型提供参考。这对于竖向承载力和变形计算方法的基础至关重要。挠度和裂缝分布规律推断离散连接的新型预制钢筋混凝土隔板处理了双向板楼板的变形特性，可为离散连接的新型预制钢筋混凝土隔板的理论分析提供依据。