Prefabricated steel-concrete composite beam construction

Abstract

The invention discloses a prefabricated structure for a steel-concrete combination beam. The prefabricated structure for the steel-concrete combination beam comprises a steel beam body, a prefabricated concrete bridge deck slab and a connecting structure body. The connecting structure body comprises studs and sleeves. One sleeve is arranged on the outer surface of each stud, and the roots of the studs are connected with a top plate of the steel beam body through threads. Each sleeve is of a frustum-shaped structure. The frustum-shaped structure of each sleeve is composed of two semicircular frustums which are symmetrical to each other. Every two semicircular frustum structures symmetrical to each other are mutually fixed through buckles or screws or other modes. Compared with stud connectors, the connecting structure body is small in initial rigidity, the stress state of the studs can be effectively improved, and the stress of the studs tends to be uniformly distributed in the height direction under the action of the horizontal shearing force; meanwhile, the situation that concrete in a stress zone nearby the studs is crushed is avoided, and the shear-bearing capacity of the prefabricated structure for the steel-concrete combination beam is greatly improved.

Description

technical field [0001] The invention relates to a steel-concrete composite beam, in particular to a prefabricated assembled steel-concrete composite beam structure. Background technique [0002] The prefabricated steel-concrete composite beam is a structural form formed by connecting steel beams and precast concrete bridge decks through shear connectors. The shear connector is the key structure of the prefabricated steel-concrete composite beam, which not only bears the horizontal shear force between the steel beam and the precast concrete bridge deck, limits the free sliding between the two, but also resists the lifting action between the two . At present, the commonly used shear connectors of prefabricated steel-concrete composite beams are stud structures. This structure has the advantages of isotropy, high shear bearing capacity, good lift-off resistance, fast and convenient construction, and easy guarantee of welding quality. However, under the action of horizontal sh...

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Problems solved by technology

However, under the action of horizontal shear force, the studs are prone to deformation along the load direction, and the stress is unevenly distributed along the height direction of the studs, and the concrete located in the compression area of ​​the studs is also easily crushed. The failure of the connection with the precast concrete bridge deck makes the prefabricated steel-concrete composite beam structure unable to continue to bear the external load

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