Assembled steel structure with replaceable beam end rotating energy-dissipating hinge and small oblique span lasso

Abstract

The invention discloses a fabricated steel structure containing a replaceable beam end rotating energy dissipation hinge and a small inclined-span lariat. The fabricated steel structure comprises fabricated steel beams, fabricated steel columns, dampers, joint plates, bolt pins, lug plates, lower connecting rods, upper connecting rods, ladder type haunched beams, bolts, end plates, front and rear cover plates, rotating plates, annular grooves, shearing blocks, shearing keys, rotating shafts, flange notches and web rib strips. A plastic-hinge region is locally weakened through the beam end rotating energy dissipation hinge of the fabricated steel structure; not only is the design concept of strong columns and weak beams reflected, but also the energy of the structure is dissipated through shearing deformation; while providing resist lateral stiffness for the structure, a small inclined-span lariat energy dissipation device conducts full energy dissipation of the dampers by enlarging horizontal displacement; and the fabricated steel structure is definite in energy dissipation mechanism and has strong energy dissipation capacity under the moving action of an earthquake, main damage and destroy of the steel structure can be alleviated, and the structure is easy to replace after the earthquake or the damage.

Description

technical field [0001] The invention relates to an assembled steel structure including a replaceable beam end rotating energy-dissipating hinge and a small oblique span lasso, belonging to the technical field of shock absorption control and assembleable structures in structural engineering. Background technique [0002] In recent years, with the improvement of our country's science and technology, the rapid growth of the economy, and the further enhancement of the comprehensive national strength, the steel output has leapt to the forefront of the world's major countries. Steel, under the guidance of this policy, a large number of steel structure buildings have emerged in economically developed regions. Due to the advantages of light weight, diverse structural forms, wide application range and environmental protection, multi-high-rise steel structures have been developed rapidly, solving the problems of scarcity of building land and environmental protection. At the same time...

AI Technical Summary

Problems solved by technology

However, the beam end weakened joints also have the following disadvantages: First, when the flange or web is weakened, the overall stiffness of the member will be reduced, and improper design will bring safety hazards to the structure

Secondly, there will be relatively serious cumulative plastic strain at the weakened part under the action of a large earthquake, and severe buckling and lateral displacement may occur. If aftershocks occur, the steel beam will undergo secondary damage and be completely destroyed.

In addition, the repair technology of locally weakened nodes after the earthquake is complicated and the cost is high

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