Prefabricated floor secondary beam combined member

Abstract

The invention discloses a prefabricated floor secondary beam combined member. The prefabricated floor secondary beam combined member comprises prefabricated floors, truss secondary beams and girders;the multiple prefabricated floors are built on a main frame spliced by the girders, grooves are formed in connection joints of the two adjacent prefabricated floors or connection joints of the two adjacent prefabricated floors and the girders, and pre-embedded pieces in the prefabricated floors and first fixing connection pieces on the girders extend out of the interiors of the grooves; concrete is poured in the grooves, and the prefabricated floors and the girders are connected; the upper parts of the truss secondary beams are fixed to the lower parts of the prefabricated floors, and fixing connection pieces connected with the prefabricated floors are arranged on the upper parts of the truss secondary beams; and connecting plates are arranged at two ends of the truss secondary beams, andthe truss secondary beams are connected with the girders through the connecting plates. According to the prefabricated floor secondary beam combined member, the prefabricated floors and the secondarybeams are combined together in a factory, the problem of initial immunity of the floors and the beams due to wet concrete is solved, and the purpose of increasing the strength and stiffness of the floors is achieved; and meanwhile, through the standardization and modularization of the prefabricated member, the workload is greatly reduced, and the construction speed is improved.

Description

technical field [0001] The invention belongs to the technical field of assembled prefabricated floor slab structures, and in particular relates to a composite prefabricated component for assembled concrete floor slab secondary beams. Background technique [0002] At present, in steel structure buildings, steel beams are generally installed first, and then corrugated steel plates are laid on the steel frame, and concrete is cast in place. Before the cast-in-place concrete is hardened, the beam and slab have not yet formed a combined action, and under the influence of the floor's own weight, the deflection of the steel beam in the construction stage increases. When designing steel beams, the steel strength cannot be fully utilized in order to meet the specification limits of deflection. [0003] For the currently popular concrete laminated floor slab, the factory prefabricates the first floor, and some steel bars need to be tied on site, and then a layer of concrete is poured...

AI Technical Summary

Problems solved by technology

[0004] Some steel structure buildings will also use fully prefabricated traditional non-superimposed floor slabs. Although it is not necessary to cast concrete on site, after the prefabricated slabs are placed on the steel beams, the beams will also deflect under the weight of the floor slabs before they form a combined effect. Causes increased beam and floor deflection

When ordinary prefabricated floor slabs and steel beams are connected by pouring on site, due to the short tendons reserved, the connection strength between the slabs and between the slabs and the steel beams is not high. Combination action, unable to transmit bending moment

When an earthquake occurs, it is easy to separate from the beam, and the plate will fall as a whole, causing casualties and property losses.

If you want to fix the slab edges and withstand the bending moment, you need to reserve a long beard steel bar to meet the anchoring requirements, so that the connection area is very wide, and you need to support the formwork at the gap between the beams and slabs and then pour concrete , the construction steps are cumbersome

[0005] In the traditional steel frame structure, for design safety, when the two ends of the main girder bear the negative bending moment, the combined effect of the steel beam and the concrete floor is not considered. It is clear that it brings difficulties to the design, and the actual structure cannot guarantee strong columns and weak beams in earthquakes; moreover, the beams in the beam-column assembly system mostly use solid-web I-beams, which have a large dead weight and inconvenient pipeline layout, which affects indoor cleanliness. high

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