Bending-shearing separation control type fabricated metal damper

Abstract

The invention relates to a damper utilizing a yielding deformation mechanism in the soft steel surface to dissipate vibration energy, and the damper is used for energy dissipation and damping of house buildings. The bending-shearing separation control type fabricated metal damper can serve as a partition element of the building function to be mounted in a structure and does not bear a vertical load. When the damper is subjected to the effect of a wind load or a seismic load, the elastic-plastic hysteretic behavior produced by deformation of metal energy dissipation sheets can dissipate the energy input by the wind load or the seismic load, and thus main components of the structure are protected. The metal energy dissipation sheets adopt bending-shearing separation control, the cumulative plastic deformation of the energy dissipation sheets is greatly reduced, and the low cycle fatigue performance of the damper is improved.

Description

(1) Technical field [0001] The invention belongs to the technical field of structural engineering seismic resistance, and relates to a damper for dissipating seismic energy by utilizing the yield deformation mechanism in a metal plane. (2) Background technology [0002] The seismic activity in recent years has caused severe damage to the engineering structure, and even caused serious casualties. A series of earthquakes in Wenchuan, Yushu, Lushan, Ludian and other earthquakes indicate that my country’s urban buildings are still facing serious earthquake threats. With the release of the new version of the seismic zoning map, the area of ​​fortified areas of 7 degrees and above in my country has increased to 58% of the national area. 82% of provincial capital cities and 57% of prefecture-level cities are in fortified areas of 7 degrees and above. How to efficiently and economically enhance the seismic capacity of building structures is one of the important topics of current earthqua...

AI Technical Summary

Problems solved by technology

Conventional metal mild steel dampers use in-plane deformation to dissipate energy, mainly shear deformation, with high rigidity and strong energy dissipation capacity

However, the energy dissipation plate is prone to out-of-plane buckling, which is difficult to control; the connection form of the energy dissipation section steel plate is mostly welding, which affects the low cycle fatigue performance of the damper on the one hand, and on the other hand, it is difficult to quickly replace it after the earthquake

In particular, the existing mild steel damper first enters yield under the control of normal stress at the four corners of the energy dissipation plate, and the cumulative plastic deformation is large. Tests show that this is the stress point where low cycle fatigue fracture first occurs for this type of damper

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