Connecting node for steel pipe concrete post and outside U-shaped steel and concrete composite beam

Abstract

The invention provides a connecting node for a steel pipe concrete post and an outside U-shaped steel and concrete composite beam. In order to prevent the lamellar tearing of the steel pipe walls and the outer surface deformation of a post wall plate, a penetrating separation plate penetrating through steel pipes is arranged in the steel pipes arranged in a position of a composite beam bottom plate; the steel pipes are broken in a position of the penetrating separation plate; the upper steel pipe and the lower steel pipe are connected with the upper end surface and the lower end surface of the penetrating separation plate through butt-jointed welding seams with grooves; a U-shaped steel bottom plate is connected with the penetrating separation plate by the butt-jointed welding seams after the amputation; the welding seams cannot easily crack; the connection intensity is high; and the anti-seismic performance is good. The two opposite ends of the steel pipes in the length direction of the composite beam are correspondingly provided with sleeves capable of being movably connected with the end parts of negative reinforcement steel bars; and the sleeves are welded with the outer walls of the steel pipes. The structural form has the advantages that the weakening on the carrying force of the steel pipes due to the hole forming in the side walls of the steel pipes can be reduced; meanwhile, the welding workload is reduced; the construction is convenient; and the assemblage can be conveniently realized. In order to effectively transfer the load, a horizontal reinforcement plate is fixedly welded in a position, corresponding to the sleeves, of an inner cavity of the steel pipes.

Description

technical field [0001] The invention relates to a concrete-filled steel pipe column and an outsourcing U-shaped steel-concrete composite beam, in particular to a connection node between a steel-pipe concrete column and an outsourcing U-shaped steel-concrete composite beam. Background technique [0002] Concrete-filled steel pipe column refers to the vertical member formed by filling concrete in the steel pipe. It has the advantages of high bearing capacity, good plasticity and ductility, high rigidity, convenient construction, and good fire resistance. It has received extensive attention from the engineering community in recent years. It is used more and more in multi-high-rise buildings and bridge engineering. According to different cross-sectional forms, CFST columns can be divided into circular CFST columns, rectangular CFST columns and polygonal CFST columns. Outer U-shaped steel-concrete composite beam is directly welded or cold-bent the steel plate into U-shaped steel...

AI Technical Summary

Problems solved by technology

[0014] (1) Since the bottom plate of the composite beam and the lower reinforced ring plate are lap welded, under the action of earthquake load, the weld seam is easy to crack and cannot meet the seismic requirements;

[0015] (2) Since the steel bars with negative bending moment all pass through the node area, there are many holes in the steel pipe wall, so the bearing capacity of the steel pipe is greatly weakened, and corresponding reinforcement measures need to be taken, such as repair welding steel plates, stiffeners, steel bars, etc. It not only increases the amount of steel used, but also increases the difficulty of construction;

[0016] (3) Since the side plate of the composite beam and the steel pipe wall are connected by welds, the on-site welding workload is large, which is not only laborious and time-consuming, but also the quality of the welds is difficult to guarantee, which is not conducive to the use of large-scale projects

[0021] (1) Since the negative moment steel bar in the joint is replaced by a negative moment steel plate similar to a "shoulder pole", and the negative moment steel plate needs to be welded on the extended upper flange of the U-shaped steel and the side wall of the steel column, therefore, the Type joints are only suitable for wide flat beams, and cannot be used for U-shaped steel-concrete composite beams of ordinary sizes, and the scope of application is very limited

In addition, negative bending moment steel plates need to be welded on composite beams and steel pipes, which further increases the welding workload on site;

[0022] (2) Since the side plate of the composite beam and the steel pipe wall are connected by welds, the on-site welding workload is large, which is not only laborious and time-consuming, but also the quality of the welds is difficult to guarantee, which is not conducive to the use of large-scale projects

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