Parapet tuned mass damper

Abstract

A parapet tuned mass damper comprises a bottom parapet (8). A shock-absorbing support (4) is arranged on the bottom parapet (8) and connected on the same through a bolt sleeve (5), a lead core (7) is arranged in the middle of the shock-absorbing support (4), and a shock-absorbing section (1) is further arranged on the shock-absorbing support (4). By the parapet tuned mass damper, extra mass needed by conventional tuned mass dampers can be reduced or even replaced, and frequency-domain width of the tunes mass damper is increased, so that dead weight and construction cost of a structure are reduced and dynamic response of the structure under a horizontal load is reduced.

Description

technical field [0001] The invention relates to a tuned mass damper, in particular to a tuned mass damper using the mass of a building itself as a shock absorbing mass. Background technique [0002] In recent years, the tuned mass damper has been widely used as an energy dissipation and vibration reduction device, and its good vibration reduction effect has also been verified by a large number of projects. However, in order to obtain a better shock absorption effect for ordinary mass-tuned dampers, the mass ratio is set to be relatively large. Normally, it is expected to reach 3% to 5% of the mass of the original structure. In order to avoid the additional mass significantly increasing the gravity load of the structure, the formation of An extended mass tuned damper using the internal mass of the structure as the shock-absorbing mass. At the same time, since the seismic excitation frequency is unknown and the frequency of the building structure cannot be accurately determin...

AI Technical Summary

Problems solved by technology

[0004] In order to make up for the defects of the existing tuned mass damper, the patent of the present invention provides a parapet tuned mass damping device, which realizes the role of the parapet as a traditional enclosure structure of a building, and at the same time acts as a tuned mass to reduce the structural response when an earthquake comes , and divide the parapet into shock-absorbing sections of different lengths with different frequencies to cope with wider frequency band excitation, effectively reduce or even replace the extra mass required by traditional tuned mass dampers, expand the frequency domain width of tuned mass dampers, reduce The dynamic response of small structures under horizontal loads enhances the applicability under normal use and the safety of the epicenter, and has more practical value

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