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为研究混凝土薄壁方箱楼盖的受力性能,并分析其在满足承载性能和使用功能要求条件下薄壁方箱楼盖的合理跨度.采用有限元分析方法,分别建立10种不同跨度的混凝土薄壁方箱楼盖和普通实心楼盖模型.通过对比分析,研究在不同载荷作用下两种楼盖的力学特性.结果表明:6.3~15.9 m的跨度范围内,在竖向载荷作用下,相同厚度的薄壁方箱楼盖和普通实心楼盖相比,10.5~15.9 m跨度内两种楼盖的竖向挠度差值较大,薄壁方箱楼盖随着跨度的增长挠度增加较快,楼盖的整体刚度变化不大.在此跨度内应用薄壁方箱楼盖,不但满足规范规定的挠度限值要求,而且要比实心楼盖节省材料,减轻结构自重,是较为合理的结构形式.
In order to study the mechanical performance of concrete thin-walled square box floor, and analyze the reasonable span of the thin-walled square box floor under the condition of bearing capacity and functional requirements, 10 kinds of concrete thin-walled square box Cover and ordinary solid floor model.According to the comparative analysis, the mechanical properties of the two kinds of floor under different loads are studied.The results show that under the load of 6.3 ~ 15.9 m, under the action of vertical load, the same thickness thin-walled square box Compared with ordinary solid floor, the difference of vertical deflection between the two kinds of buildings in the span of 10.5 ~ 15.9 m is larger, the deflection of the thin-wall square floor increases rapidly with the increase of span, and the overall stiffness of the floor does not change In this span of thin-walled square box floor cover, not only to meet the regulatory requirements of the deflection limit requirements, but also to save material than the solid floor, reduce the weight of the structure is a more reasonable structure.