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为研究开孔薄壁钢梁-轻骨料混凝土组合楼板的受力性能,设计并制作了5块具有不同构造(不同预制板型、抗剪方式及腹板开孔率)的组合楼板试件,进行了简支条件下均布加载受力性能试验研究。结果表明:该组合楼板具有较高的整体刚度和承载能力,当等效均布荷载达到6 k N/m~2时,跨中挠度远小于L/500(L为试件跨度);对于相同的开孔率,薄壁钢梁腹板的开孔应优选孔径小、数量多的开孔形式;采用文中所构造的抗剪键及其布置形式的组合楼板,其抗剪效果明显优于采用结构胶黏结混凝土板和钢梁的;组合效应系数可以较好地反映组合楼板的整体特性及内部损伤。
In order to study the mechanical behavior of perforated thin-walled steel beam-lightweight aggregate concrete composite floor, five composite floor samples with different structures (different precast slab type, shear mode and web hole ratio) were designed and fabricated. Experimental Research on Mechanical Properties of Uniformly Loaded Simply Supported Structures. The results show that the composite slab has high overall stiffness and bearing capacity. When the equivalent uniform load reaches 6 kN / m ~ 2, the midspan deflection is far less than L / 500 (L is the span of the specimen) The opening ratio of the thin-walled steel beam webs should be less than that of the open holes with the smallest aperture and the larger number of holes. The shearing effect of the combination of shear-resistant keys and their arrangement is better than that of the structural glue Bonded concrete slabs and steel beams; Coefficient of combined effect can better reflect the overall characteristics of the composite floor and internal damage.