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为研究全预制装配式钢筋混凝土楼盖的平面内受力性能,对1/2缩尺的楼盖模型进行了楼盖平面内拟静力试验,对楼盖的裂缝分布、破坏形态、平面内变形特征、滞回曲线、位移延性、刚度退化和耗能能力等进行了研究,分析了楼盖模型各连接件在加载过程中的板缝剪力和轴力分布规律。结果表明:新型楼盖具有较大的平面内刚度和较好的整体性能,在加载过程中梁-板连接件和板缝连接件均表现出良好的传力性能;新型楼盖具有一定的延性,但耗能能力不理想,说明基于弹性楼盖的抗震设计方法是必要的;加载初期楼盖的变形呈弯曲型,加载中后期随着楼盖损伤的积累,板缝间相对位移增大,变形模式逐渐向剪切型发展;新型楼盖在平面内荷载作用下内力分布规律与简支梁相近,研究成果可为新型楼盖平面内受力性能的理论分析提供参考。
In order to study the in-plane force performance of fully prefabricated reinforced concrete floor, the pseudo-static test of the floor of the ½-foot scale floor was carried out. The distribution of cracks in the floor, the failure mode, Deformation characteristics, hysteresis curve, displacement ductility, stiffness degeneration and energy dissipation were studied. The law of shear stress and axial force of slab joints during the loading process was analyzed. The results show that: the new floor has a large in-plane stiffness and better overall performance, the load-carrying process of beam-plate connectors and plate joints showed good performance of transmission; the new floor has a certain ductility , But the energy dissipation capacity is not ideal, which shows that the seismic design method based on the elastic floor is necessary; the deformation of the floor is curved at the initial stage of loading, with the accumulation of floor damage, The deformation mode gradually develops to the shear mode. The internal force distribution law of the new type of floor under the action of plane load is similar to that of simply supported beam. The research results can provide a reference for the theoretical analysis of the mechanical performance of the new type of floor.