Vibration isolation and damping composite system

The seismic isolation and damping composite system with synchronized TMDs at the superstructure and suspension structure effectively reduces acceleration by synchronizing with the structure's primary period, addressing the mismatch in periods of superstructure and suspension structures.

JP7841911B2Active Publication Date: 2026-04-07SHIMIZU CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-03-18
Publication Date
2026-04-07

AI Technical Summary

Technical Problem

In structures with suspension structures, such as elevators, the periods of the superstructure and the suspension structure are not the same, leading to diminished effectiveness of reducing acceleration at the top of the superstructure using inclined sliding bearings and upper TMDs in combination.

Method used

A seismic isolation and damping composite system is installed, comprising an upper vibration damping device at the top of the superstructure and a lower vibration damping device at the bottom of the suspended structure, both functioning as TMDs, with the sliding bearings supporting the superstructure allowing free horizontal sliding and synchronized period setting to the primary period of the structure.

Benefits of technology

This system effectively reduces acceleration at both the superstructure and suspension structure during an earthquake by synchronizing the TMD mechanism with the structure's primary period, independent of sliding bearing rigidity, achieving reduced acceleration above and below the center of gravity.

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Abstract

To provide an isolation / damping composite system that can reduce the acceleration of both a superstructure and a suspended structure during an earthquake.SOLUTION: An isolation / damping composite system 2 is installed in a building 1 equipped with an upper structure 17 and a suspension structure 19 suspended from the upper structure 17 and is comprised of an upper side damping device 20A provided on the uppermost 17u of the upper structure 17 and functioning as a TMD, a sliding bearing 30 for supporting the lower part of the upper structure 17, and a lower damping device 20B provided on the lowermost 19d of the suspension structure 19 and functioning as the TMD.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

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