Seesaw type amplification type energy dissipation extending arm capable of preventing out-of-plane instability

Abstract

The invention discloses a seesaw type amplification type energy dissipation extending arm capable of preventing out-of-plane instability. The extending arm comprises an extending arm truss, an outer frame column, a seesaw type amplification device, a viscous fluid damper, a viscoelastic damper and out-of-plane instability preventing connecting steel plates. The seesaw type amplification device is hinged to the outer frame column through a left hinge point, and the seesaw type amplification device is hinged to the extending arm truss through a right hinge point; the seesaw type amplification device is respectively hinged with one end of the viscous fluid damper through the upper hinge point and the lower hinge point, and the other end of the viscous fluid damper is hinged with the extending arm truss; and the out-of-plane instability preventing connecting steel plates are fixed to the upper end and the lower end of the outer frame column and fixedly connected with the viscoelastic damper, and the viscoelastic damper is fixedly connected with a pin shaft of the upper hinge point or the lower hinge point. The energy dissipation extending arm is high in feasibility, the key technical problem of an existing energy dissipation extending arm with an amplifying device is solved, and the energy dissipation and shock absorption effects and the capacity of coordinating deformation of an inner cylinder and an outer frame are superior to those of an existing technical scheme.

Description

technical field [0001] The invention relates to the technical field of building energy dissipation, in particular to a seesaw-type enlarged energy-dissipating outrigger for preventing out-of-plane instability. Background technique [0002] The number of super high-rise buildings in my country ranks among the top in the world. At the same time, it is a country with frequent earthquakes. Seismic design has become a key link in the design of super high-rise buildings. In super high-rise buildings, horizontal outrigger trusses with higher rigidity are usually used on the refuge floor and equipment floor to coordinate the deformation between the core tube and the outer frame. It is converted into axial force and transmitted to the surrounding columns, so that the outer frame and the core tube are jointly stressed to improve the lateral stiffness, reduce the section size of the shear wall, tube and column, and increase the use area. For example, domestic super high-rise buildings...

AI Technical Summary

Problems solved by technology

At present, the existing outrigger truss energy dissipation and shock absorption systems with amplification devices generally use viscous fluid dampers, which have no stiffness under static loads and small dynamic stiffness under earthquakes, and their energy dissipation capacity cannot increased in intensity

[0013] (2) Stress concentration of the amplification device, out-of-plane stability cannot be guaranteed

The rigidity and internal force of the outrigger reinforcement layer are very large. Since the amplifying device utilizes the principle of leverage, the stress of the device on the side of the short arm is further amplified, and stress concentration is inevitable, and the gap at the hinge of the rod is large, which is extremely Prone to out-of-plane deformation or even instability

Out-of-plane stability is an important guarantee for the normal operation of the amplifying device. The existing outrigger truss energy dissipation and shock absorption systems with amplifying devices have not considered this factor, which restricts its engineering application.

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