Antisymmetric torsional damper

Abstract

The invention provides an antisymmetric torsional damper and belongs to the field of vibration control for building structures. The antisymmetric torsional damper comprises a forward-torsional energy-dissipation steel plate, energy-dissipation ribs, internal round holes, a torsional squeeze energy-dissipation plate, a connecting plate, connecting plate screw holes, lead dot holes, a torsional squeezing steel plate, lead dots, a middle interlayer energy-dissipation soft steel plate and an antisymmetric torsional energy-dissipation steel plate. The antisymmetric torsional damper has the advantages that major earthquake and small earthquake are subjected to torsional energy dissipation in stages through the damper, so that requirements from small earthquake and wind vibration can be met; themiddle interlayer energy-dissipation soft steel plate can be driven by the lead dots to achieve energy dissipation together during torsion under action of medium earthquake or major earthquake; the torsional energy dissipation capacity of the damper is improved greatly through the energy dissipation ribs and the internal round holes on the forward-torsional energy-dissipation steel plate and the antisymmetric torsional energy-dissipation steel plate, intensive stress concentration is avoided during torsional energy dissipation, processing is facilitated, and post-earthquake repairing and changing is also facilitated; the arrangement of antisymmetric combination allows the torsional energy dissipation of the damper to be more uniform and disperse; and the torsional energy dissipation effectof the damper is excellent due to the staged energy dissipation manner.

Description

technical field [0001] The invention belongs to the field of vibration control of building structures, in particular to a torsional antisymmetric damper. Background technique [0002] Metallic yielding dampers are various forms of damping energy dissipators made of mild steel or other soft metal materials. Metals have good hysteretic properties after yielding, and some metals have elastic-plastic hysteretic deformation energy dissipation, including mild steel dampers, lead dampers, and shape memory alloys (SMA) dampers. The mechanism of its vibration control on the structure is to dissipate part of the energy of the structure vibration through the yield hysteresis energy consumption of the metal, so as to reduce the structural response. The mild steel damper is to make full use of the soft steel after entering the plastic stage Good hysteresis characteristics. In 1972, American scholars such as Kelly and Skinner first began to study the use of this property of mild steel t...

AI Technical Summary

Problems solved by technology

After theoretical analysis and experimental research by many scholars at home and abroad, it is confirmed that the mild steel damper has stable hysteresis characteristics, good low-cycle fatigue performance, long-term reliability and is not affected by the environment and temperature. It is a very good damper. Promising energy consumers, all-metal dampers have the advantages of large recoverable deformation, strong damping capacity, durability, corrosion resistance, fatigue resistance, wide operating temperature range and low maintenance costs, and are transmitted to building structures due to earthquakes and other reasons The external energy of the structure is the source of the vibration of the structure, so the energy dissipation properties of the damper will be the key to reducing the vibration response of the structure. Anti-buckling effect, resulting in a significant reduction in energy dissipation capacity

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