Construction method for beam column joint core area rigid steel structure

Abstract

The construction method of the steel structure in the core area of ​​the beam-column joint is to firstly carry out multi-pass, anchorage and less welding operations on the steel structure, and then carry out beam addition and beam height reduction operations on the section; multi-pass means that on both sides of the support For the upper steel bars with different reinforcement values, it is advisable to choose steel bars with the same diameter as much as possible so that they can pass through the support and avoid anchoring at the support separately; when the beam reinforcement cannot meet the conditions for penetrating joints, it can be selected in the core area of ​​the joint Carry out anchoring; less welding means that when the beam reinforcement cannot meet the conditions of penetration joints and anchorage, you can choose to weld the reinforcement to the section steel reinforcement plate; the beam is added with axillary, that is, the stressed reinforcement at the edge of the beam can bypass the section steel column to penetrate or directly anchor; Lowering the height of the beam is to reduce the elevation of the top of the beam. In multi-beams and multiple rows of steel bars, it may lead to complex nodes with super high slab surface after pouring, and reduce the elevation of the top of the beam. Guaranteeing the strength of the node area also weakens the impact of concrete strength changes, and the bearing capacity can be increased by 20%-30%, reducing construction costs.

Description

technical field [0001] The invention relates to IPC international patent classification E04G construction tools or other construction auxiliary equipment, especially a construction method for a steel structure in the core area of ​​beam-column joints. Background technique [0002] Frame In the high-rise reinforced concrete structure, the frame, frame shear or frame tube structure plays a very important role as the lateral force resistant member. In the seismic design, "strong column weak beam", "strong shear weak bending", "strong joint" as the basic design principles are also important seismic structural measures to ensure that the structure has a reasonable seismic defense line and greater ductility and guarantee of energy consumption. The beam-column core area is the key to the realization of these seismic measures. However, the beam-column joint itself is relatively complex, and the force is complex, and shear compression failure and bonding and anchoring failure may o...

AI Technical Summary

Problems solved by technology

When there are shaped steel beams, shaped steel columns, and even multi-beam intersections at the same time, the construction technology is complicated and the construction is difficult, especially the construction quality of the core area of ​​such complex beam-column joints is difficult to get due guarantee

The beam-column core area of ​​such complex joints often has dense and intricately arranged steel bars, difficult to meet the anchorage length of the steel bars, difficult to control the welding quality with the rib plate, insufficient welding operation surface for the steel bars at the bottom of the beam, and difficult to control the opening ratio of the steel members. The superimposed arrangement of steel bars leads to construction problems such as super-high slabs

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