轻质装配式叠合楼板拼接处受力性能试验研究

Experimental Study on the Mechanical Properties of the Joint of Lightweight Prefabricated Composite Slabs

提出了一种轻质装配式叠合楼板,由压型钢板、带桁架钢筋轻质陶粒混凝土预制层及普通混凝土现浇层三部分组成,在拼接处增设构造钢筋并用栓钉将楼板与钢梁焊接。分析了各级加载下试件在拼接处的抗弯承载力、挠度以及裂缝等力学性能指标。结果表明,拼接处的构造措施能有效提高叠合楼板的承载力和变形能力;与普通叠合楼板相比,该种楼板具有自重低、承载力高、延性好及施工效率高等特点,具有广阔的应用前景。

A lightweight prefabricated composite slab was proposed, which was made up with a profiled steel sheet, a ceramsite concrete preformed layer and a cast-in-place layer, adding structural steel bars at joints and welding the slabs to steel beams with bolts. The mechanical properties of the flexural capacity, deflection and cracks at the joints of the specimens under various loading levels were analyzed. The results show that the structural measures at the joints can effectively improve the bearing capacity and deformation capacity of the composite floor. Compared with the common composite slabs, this kind of slab has the characteristics of light weight, high strength, good ductility and high construction efficiency, and has broad application prospects.