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提出了一种工业化程度高的新型全预制装配式RC楼盖体系,介绍了其构造特点。预制装配式楼盖受力复杂,且其平面内力学特征对整个结构体系的抗震性能影响巨大。引入了预制装配式楼盖平面内刚度的计算方法,并对新型楼盖的平面内刚度进行了评价。采用基于反应谱理论的振型分析和数值分析相结合的方法对新型楼盖进行了空间结构分析,研究了该新型楼盖的平面内变形特征和破坏模式。在新型楼盖平面内力学特征研究的基础上,讨论了新型楼盖合理的设计方法。结果表明:新型楼盖构造形式能有效地提高预制装配式楼盖的整体性和平面内刚度,模型楼盖在仿8度地震烈度水平荷载作用下,平面内相对挠度较小;用现行规范设计新型楼盖结构存在较大偏差,建议采用考虑楼盖真实刚度的空间振动模型或修正的刚性假定简化方法进行新型楼盖结构的抗震验算。
A new type of fully prefabricated RC building system with high degree of industrialization is put forward and its structure is introduced. The fabricated prefabricated floor is stressed by force, and its in-plane mechanical characteristics have great influence on the seismic performance of the whole structural system. The calculation method of in-plane stiffness of prefabricated assembly floor was introduced and the in-plane stiffness of the new floor was evaluated. The spatial structure of the new floor was analyzed by the combination of mode shape analysis and numerical analysis based on response spectrum theory. The in-plane deformation characteristics and failure modes of the new floor were studied. Based on the research on the mechanical characteristics of the new floor, the reasonable design method of the new floor is discussed. The results show that the new floor structure can effectively improve the integrity and in-plane stiffness of the prefabricated building. The relative deflection in the plane of the model floor under the load of simulated 8 degree seismic intensity is relatively small. With the current standard design The new floor structure has a big deviation, it is recommended to consider the real stiffness of the floor space vibration model or a modified rigid assumption simplified method for seismic checking of the new floor structure.