Double T-shaped composite beam with prestressed steel tube concrete mandrel and its preparation method

Abstract

The invention provides a double T-shaped composite beam provided with prestressed steel tube concrete core rods, which is formed by utilizing the prestressed steel tube concrete core rods as tensioned lower flanges, adopting corrugated steel plates as web plates and pouring an upper flange top plate with high-strength concrete. The prestressed steel tube concrete core rods consist of steel tubes, intra-tube concrete and prestressed steel bars, and have high tension capacities; as the prestressed steel tube concrete core rods are combined with the corrugated steel web plates for use, the advantages are complemented, the shear capacity and flexural capacity of a crossbeam are improved, and the crossing ability of the crossbeam is improved. The composite beam has the advantages of light weight, great crossing ability, high bearing ability, high stiffness, low cost and the like, can be suitable for volume production in prefabricated part factories, can serve as a roof beam for constructing a 30-48m oversized-span single-storey industrial factory building, and as a floor beam for constructing a 21-30m large-span multi-storey industrial factory building, meets the requirements of industrial production on a large space, and saves land.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a large-span composite beam structure for construction engineering, in particular to a double T-shaped composite beam with a prestressed steel pipe concrete mandrel. Background technique [0002] With the development of industrial production, large-span industrial plants are required to meet the huge production space, place production equipment, and flexibly arrange production processes. With the development of society, large-span houses such as hangars, garages, docks, gymnasiums, laboratories, and exhibition halls with larger and larger indoor spaces are required. [0003] The roof structure of large-span factory buildings usually adopts structural forms such as grid frame, portal frame light steel structure, and prestressed concrete double T-slab. Among them, the grid structure has the advantages of large bearing capacity, large spanning capacity, good structural stability, and...

AI Technical Summary

Problems solved by technology

Among them, the grid structure has the advantages of large bearing capacity, large spanning capacity, good structural stability, and high rigidity. It is generally used for factory roof structures with a span of 36 meters or more, but the construction process of the grid structure is complicated and the cost is high.

Portal frame light steel structure has the advantages of light weight, high degree of industrialization, fast construction speed, and large spanning capacity. It is generally used for plant structures with a span of 24 to 36 meters. However, the portal frame light steel structure is anti-corrosion , poor fire protection and heat insulation performance, and the high-altitude welding workload of the light steel structure of the portal frame is large

Prestressed concrete double T slab is a new type of roof component with beam and slab integrated. It has the advantages of low cost, good heat preservation, moisture resistance, corrosion resistance, short construction period and long service life. It is generally used for 15-24 meters span The prestressed concrete double T slab has the disadvantages of self-heavy, small rigidity, and low bearing capacity.

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