What are the application prospects of steel truss floor slabs?

During the construction phase of the steel truss floor slab load-bearing plate, the pressed steel plates below are interlocked to support the concrete, and the steel truss provides strength and stiffness; In the application stage, the steel truss is the steel reinforcement that bears the applied load on the concrete floor slab. Therefore, it has the advantages of fast construction speed for composite or non composite floor slabs made of profiled steel plates, as well as the advantages of high overall stiffness and good seismic performance of cast-in-place concrete. When selecting the steel truss floor slab load-bearing plate, the thickness of the floor slab is 100-200 mm, and the unsupported span during the construction phase is 3-5m. For traditional profiled steel plate floor slabs with a thickness greater than 110mm, the unsupported span during the construction phase is 2.5-3m. The load-bearing capacity of steel truss floor slabs is significantly better than that of cast-in-place slabs and profiled steel plates, with a maximum unsupported floor span of up to 5.4m

In order to fully utilize the advantage of short construction period of steel structures, multi story and high-rise steel structure panels generally use closed or open profiled steel plate composite panels and non composite panels with rib heights of 51mm, 76mm, and thicknesses of 0.8-1.2mm. The combination of profiled steel plates and floor slabs saves formwork scaffolding and accelerates floor construction. However, due to the material and cross-sectional characteristics of the profiled steel plate itself, as a steel structure support product, it also has the following disadvantages: generally, the cost is too high; The thickness of the floor slab is 20-50 millimeters thicker than the cast-in-place concrete floor slab, which reduces the net height of the building floor slab; Its lower surface is uneven; Fire and corrosion prevention functions need to be studied and discussed. The different bidirectional stiffness of floor slabs has a certain impact on the transmission of horizontal forces. The on-site reinforcement binding requires a large amount of work, making it difficult to ensure the accurate positioning of the upper negative reinforcement at the support point. The influence of rib height of profiled steel plate on winter construction pipeline installation and additives.

The load-bearing plate of steel truss floor slab is formed by welding the upper part and foundation longitudinal bars of cast-in-place concrete floor slab with curved small diameter web bars to form a small truss with certain stiffness and bearing capacity. Then, the bent feet of the small truss are welded together with profiled steel plates with rib height of only 2mm and plate thickness of 0.4-0.6mm All these processing operations are completed through the factory's automated production line.