Multi-level damping grading yield metal damper

Abstract

The invention provides a multi-level damping grading yield metal damper comprising at least two annular damper bodies coaxially arranged in an inside and outside sleeving mode. An interval is arranged between the two adjacent annular damper bodies connected through a connecting base plate; the two annular damper bodies are used for being connected with a building structure; and when bent and deformed, the annular damper body relatively located in an inner ring preferentially yields than the annular damper body relatively located in an outer ring. The multi-level damping grading yield metal damper can produce the good damping energy dissipation effect in small earthquakes, middle earthquakes and large earthquakes simultaneously.

Description

technical field [0001] The invention belongs to the field of energy dissipation and shock absorption of building structures, and relates to a staged yield damper for shock absorption. Background technique [0002] Energy dissipation and shock absorption technology is an anti-seismic technology widely used in countries all over the world, and has been widely used at home and abroad. At present, various types of dampers have been developed, such as viscous fluid dampers, viscoelastic dampers, friction dampers and magneto-rheological dampers, etc. Among them, metal dampers are durable and easy to construct because of their low manufacturing cost. The cost of maintenance and replacement is low, and it is currently the most widely used in the field of engineering structure shock absorption. [0003] The metal damper utilizes the plastic hysteretic deformation generated when the metal material yields to dissipate the energy input by the earthquake, which can effectively reduce th...

AI Technical Summary

Problems solved by technology

However, most of the existing metal dampers at present are energy-consuming in the yield of moderate earthquakes, which leads to a limited increase in the yield bearing capacity of the dampers during major earthquakes, and the dampers cannot play a greater role in energy consumption during major earthquakes.

There is also a part of the metal damper that yields and dissipates energy only when it is subjected to a large earthquake, while it is generally in the elastic stage during a moderate earthquake and does not dissipate energy, so the damper cannot dissipate the earthquake during a moderate earthquake The role of energy

In addition, more metal dampers are in an elastic state during small earthquakes and cannot play a role in energy dissipation

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