拼装式混凝土双向叠合楼板承载性能试验研究

针对目前叠合双向板预制层构件尺寸过大时吊装及运输过程较困难的问题,提出一种新型拼装式混凝土双向叠合楼板.为研究此拼装式叠合板的承载性能,首先对其进行弹性范围内的均布堆载试验,然后再对此板和一单向叠合板进行集中荷载下的破坏性对比试验.主要分析内容为挠度、钢筋应变、混凝土应变随荷载变化的规律及裂缝开展情况.均布荷载试验表明,此拼装式叠合板具有较高的承载能力;集中荷载破坏性对比试验结果表明,此拼装式钢筋混凝土叠合板具有明显的双向受力性能优势.说明此类拼装式叠合板具有良好的承载性能,又方便吊装运输,是一种值得推广的新型楼板.

Experimental Study of the Load Carrying Capacities of Assembled Concrete Superimposed Two-way Slabs

This paper put forward a new concrete superimposed slab with connections to solve the problem that the prefabricated layer of two-way slab is difficult to be hoisted and transported if it is too big. In order to study the bearing capacity of the new slab, this study first conducted a uniformly distributed load experiment on the new slab in the range of elasticity, and then conducted a destructive experiment in the condition of the concentrated load compared with the superimposed one-way slab. The major contents include the deflection, reinforcement strain, concrete strain variation with the load and crack development. The uniform loading comparative experiment indicates that the new slab has high loading capacity. The destructive concentrated loading comparative experiment shows that the new slab has good two-way loading capacity. It shows that this new slab has good loading capability and is easily hoisted and transported, so it is worth popularizing this new slab structure.