Shear-resistant connection joint of cast-in-place composite space truss

Abstract

The invention relates to a shear-resistant connection joint of a cast-in-place composite space truss. The shear-resistant connection joint comprises a joint hollow hemisphere, a joint cover plate, a long steel channel, two short steel channels and hole-penetrating steel bars. The joint hollow hemisphere is located at the junction of a steel truss and a cast-in-place concrete plate, the long steel channel is welded on the top face of the joint cover plate, the two short steel channels are arranged on two sides of the long steel channel respectively, the long steel channel and the two short steel channels are disposed in a cross manner, a plurality of round holes are formed in a web of the long steel channel, a plurality of round holes are formed in a web of each short steel channel, and the steel bars are penetratingly arranged in the round holes. The shear-resistant connection joint is simple in structure, convenient to construct and applicable to shear connection of cast-in-place composite structures; pressure-bearing contact surface between the perforated steel channels and concrete is large, the steel channels, rod-shaped concrete tenons formed by perforation on the steel channels and the hole-penetrating steel bars can jointly bear horizontal shear action and uplift action in two directions between the upper and lower portions of cast-in-place composite steel and concrete, and the shear-resistant connection joint is high in connection stiffness, high in shear capacity and good in ductility and anti-fatigue performance.

Description

technical field [0001] The invention belongs to the field of civil construction, and in particular relates to a shear-resistant connection node of a cast-in-place composite network frame. Background technique [0002] The composite grid is a large-span space structure composed of reinforced concrete floor slabs and steel grids. Traditional composite grids generally use prefabricated reinforced concrete slabs, which transmit shear force by connecting steel plates embedded in the corners of prefabricated reinforced concrete slabs with fillet welds and node connectors. The force transmission structure is complex and becomes the weak link of composite grids . In recent years, with the development of commercial concrete industry, cast-in-place concrete structures have been widely used. Compared with prefabricated reinforced concrete slabs, cast-in-place reinforced concrete slabs have the characteristics of good structural integrity and high rigidity. They can form a new type of...

AI Technical Summary

Problems solved by technology

[0003] Studs are often used as shear connectors in composite structures such as composite beams, but the shear connectors of the composite grid are distributed in points, and the stiffness and strength of the studs are small, which is difficult to meet the requirements of the shear design of the composite grid

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