Double-stage shear type damper and design method thereof

Abstract

The invention discloses a double-stage shear type damper and a design method thereof. The double-stage shear type damper comprises a first energy consumption unit and a second energy consumption unit, wherein the second energy consumption unit and the first energy consumption unit are connected in series in the axial direction, the axial direction is the length direction of the double-stage shear type damper, the second energy consumption unit comprises a second core plate, outer cover plates, viscoelastic material layers and an axial limiting piece, the outer cover plates are arranged on at least one side of the second core plate in the thickness direction, the viscoelastic material layers are arranged between the second core plate and the outer cover plates, axial limiting parts are connected with the second core plate and are perpendicular to the outer cover plates so as to axially limit the second energy consumption unit, and shearing limiting parts are located on the two sides of the outer cover plates in the width direction and are spaced from the outer cover plates so as to limit the deformation range of the second energy consumption unit. According to the double-stage shearing type damper, switching of the two energy consumption units under different deformation conditions is achieved through the shearing limiting parts, the performance is stable, and the deformation capacity is large.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a two-stage shear damper and a design method for the two-stage shear damper. Background technique [0002] In related technologies, installing shear dampers at appropriate positions in frame or shear wall structures can dissipate seismic energy and reduce structural response. However, the traditional shear damper has only one yield point, and under the action of earthquakes, the floors with larger deformations enter yield first, resulting in concentrated deformation and weak floors, which greatly reduce the deformation capacity and collapse resistance of the structure. On the other hand, under the action of small earthquakes, the damper often does not enter the plasticity, and it is difficult to increase the structural damping and control the acceleration response of the structure. Therefore, under small earthquakes, especially for the shear wall structure, the accelera...

AI Technical Summary

Problems solved by technology

However, the traditional shear damper only has one yield point. Under the action of earthquakes, the floors with larger deformations enter yield first, resulting in concentrated deformation and weak floors, which greatly reduce the deformation capacity and collapse resistance of the structure.

On the other hand, under the action of small earthquakes, the damper often does not enter the plasticity, and it is difficult to increase the structural damping and control the acceleration response of the structure. Therefore, under small earthquakes, especially for the shear wall structure, the acceleration response is too large, and the acceleration-sensitive non-structural components are seriously damaged. It is difficult to realize the rapid recovery of building functions after the earthquake

Images