Light steel grille concrete superposed beam

Abstract

The invention relates to a building structure, and discloses a light steel grille concrete superposed beam comprising two lateral erecting plane light steel trusses extending along the longitudinal direction of the beam, the bottom parts of two lateral erecting plane light steel trusses are connected together by multiple tied steel bars I; the outer side of each lateral erecting plane light steeltruss is connected with a side mold of a cement fiber board beam; the bottom parts of the two lateral erecting plane light steel trusses are provided with a bottom mold of the cement fiberboard beam;the two side molds of the cement fiber board beam and one bottom mold of the cement fiber board beam form a cement fiber board beam mold having a cross section of a trough shape; the cement fiber board beam mold is internally poured with a concrete solid; the concrete solid, the two lateral erecting plane light steel trusses and the cement fiberboard beam mold are superposed into a whole to form the superposed beam under integral stress. The lifting weight of a prefabricated beam on construction site is greatly reduced, and the construction process is economical and safe; the use of zero template is achieved, reinforcing steel bars are not matched or a fewer of the reinforcing steel bars are matched, the construction period is greatly shortened and the project cost is reduced.

Description

technical field [0001] The invention relates to a building structure, in particular to a light steel grid concrete composite beam. Background technique [0002] At present, as the country and localities successively promulgate relevant policies to develop prefabricated buildings and promote the industrialization of buildings, prefabricated buildings have entered a new period of rapid development, and various prefabricated building structures have sprung up, such as prefabricated buildings. Concrete structure, prefabricated light steel structure, demolition-free formwork structure system, etc. However, various systems have encountered many problems in practical application, which have caused difficulties in the large-scale promotion of prefabricated buildings. For example, in the application process of prefabricated concrete structures, the prefabrication rate is generally low, the construction technology is not perfect, and the joints are connected. The large amount of wet w...

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Problems solved by technology

However, various systems have encountered many problems in practical application, which have caused difficulties in the large-scale promotion of prefabricated buildings. For example, in the application process of prefabricated concrete structures, the prefabrication rate is generally low, the construction technology is not perfect, and the joints are connected. The large amount of wet work affects the construction period and cost, and the construction cost is higher than that of the traditional cast-in-place structure. The prefabricated light steel structure has not been widely used in my country. The main reason is that customers have misunderstood this system and think that the light steel structure system is similar to the plate The building is not solid, so the acceptance is not high; the formwork-free formwork system cannot participate in the structural force and is not easy to dismantle after the pouring is completed, resulting in the increase of the size of the structural components and affecting the use of the building

Prefabricated beams are widely used in prefabricated buildings, but traditional reinforced concrete prefabricated beams are heavy to lift, and a single prefabricated beam weighs about 2-3 tons, and the joint connection is complicated, and cracks are prone to appear at the joint between cast-in-place and prefabricated

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