Combined hollow floor slab comprising steel, concrete and hung fireproof ardealite plate and its production process

Abstract

The present invention discloses large hollow steel-concrete floor slab and its production process. The floor slab has formwork of U-shaped cross section thin steel sheet connected into lattice and reinforced concrete deposited into the formwork to constitute integral lower rib lattice slab of the large hollow floor slab; in-situ deposited dense rib reinforced concrete slab with ardealite formwork as the upper rib lattice slab; reinforced concrete shear key to connect the lower rib lattice slab and the upper rib lattice slab integrally; and fireproof ardealite board fixed to the outside of the U-shaped cross section thin steel sheet. The present invention has the advantages of low steel consumption, low construction cost, high rigidity, high strength, convenient construction, etc.

Description

Technical field: [0001] The invention relates to a floor structure of a building and a manufacturing method thereof, in particular to a steel and concrete externally hung phosphogypsum fire-proof board combined hollow large slab floor and its production method. Background technique: [0002] At present, there are generally three types of steel-concrete composite structure floor structures. One is the steel-concrete composite beam structure, which is composed of concrete slabs and I-beams. There are the following deficiencies: ①The maximum bending moment of simply supported composite beams occurs in the middle of the span, and the section of the I-beam is prepared according to the maximum bending moment, and the steel section is not prepared according to the magnitude of the force, and the amount of steel used is large. ②The height of the structure is large, and the single beam bears the force on the plane, which does not have the characteristics of three-dimensional force, ...

AI Technical Summary

Problems solved by technology

[0002] At present, there are generally three types of steel-concrete composite structure floor structures. One is the steel-concrete composite beam structure, which is composed of concrete slabs and I-beams. There are the following deficiencies: ①The maximum bending moment of simply supported composite beams occurs in the mid-span, and the section of the I-beam is prepared according to the maximum bending moment, and the steel section is not prepared according to the magnitude of the force, and the amount of steel used is large

②The height of the structure is large, and the single beam bears the force on the plane, which does not have the characteristics of three-dimensional force, and the purpose of saving steel consumption cannot be achieved; ③For the steel-concrete composite frame beam, the negative bending moment near the frame column is generally greater than that of the composite The positive bending moment in the middle of the beam span, the concrete near the supporting column is under tension and the section steel is under compression, which does not give full play to the respective mechanical properties of steel and concrete

The construction of this structure results in an excessive amount of section steel, requiring a large surface area for rust and fire protection, resulting in increased maintenance costs

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