Novel steel-concrete combined open web girder system

Abstract

Concrete upper ribs and floors of a novel steel-concrete combined open web girder system are made of cast-in-place concrete and form an orthogonal cross shape; holes are formed in reverse T-shaped joints of combined components so that concrete can be conveniently cast into the holes and shear connectors can be formed; reverse T-shaped steel pipes and U-shaped steel plates are all prefabricated in a factory, in the use process, the U-shaped steel plates penetrate through reserved holes in the bottoms of the reverse T-shaped steel pipes, and the T-shaped steel pipes and the U-shaped steel plates are positioned through high-strength bolts of bottom plates, and concrete is cast into the shear connectors into a whole. The system has the advantages that the structural deadweight is reduced, and rigidity is less reduced; the size of the shear connectors is reduced, and the rigidity of the shear connectors is improved; tensile force is borne by the square steel pipes, the steel pipes participate in shear resistance at the joint shear connectors, and the mechanical performance of materials is brought into full play; no welding or formworks are needed, welding stress and deformation are avoided, construction procedures are reduced, and construction efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the field of construction engineering, and in particular relates to a novel steel-concrete composite vierendeel beam system. Background technique [0002] In the entire structural system formed by the floor, beams, columns and foundation, the ordinary floor can only reach about 6 meters. When it is large, the height of the beam must be increased in order to increase the stiffness, thereby reducing the headroom height. At the same time, in order to reduce the deflection of the floor slab, the floor slab is often thickened. For a heavy floor slab, the amount of concrete and steel bars is large, and the self-weight of the building is increased, which is very uneconomical. [0003] For this reason, many domestic scholars and experts have improved the traditional beam-slab floor system. The reinforced concrete hollow sandwich panel floor has been applied to Guizhou Anshun International Furniture City and Guizhou Aluminum Plant sinc...

AI Technical Summary

Problems solved by technology

In the process of applying this system to the factory building project of Hong Kong Main Electric (Guiyang) Co., Ltd., the problem of large welding deformation appeared

The reason is that the welding shrinkage stress makes each grid of U-shaped steel plate bulge upward, which causes a large upward welding deformation, making it difficult to splice the grid of U-shaped steel plate with combined lower ribs, and it is impossible to ensure that the grid is square and straight

Correspondingly, this system also has the problem of large welding workload on site

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