A tuned gas-liquid column damper and structural vibration control system with dual damping and frequency adjustment functions

Abstract

The invention discloses a novel tuning gas-liquid column damper with a damping and frequency dual regulation function and a structural vibration control system. The damper can be used for regulating damping and frequency conveniently, thereby achieving the optimal vibration / shock reduction effect on a controlled structural object in different construction phases under different intensities of loads. The novel damper has two characteristics, wherein one characteristic is that a damper valve which can regulate damping force is arranged on a horizontal section of a U-shaped pipe, and the damper valve is a magneto-rheological friction-type damper valve or an electromagnet friction-type damper valve; the other characteristic is that a gas column is further closed at vertical sections on the two sides of the U-shaped pipe, an air pressure regulation device is also installed, and the frequency of the damper is changed by means of regulating air pressure. The structural vibration control system is composed of at least one damper, at least one sensor used for measuring a structural vibration state and at least one controller, and can achieve the optimal vibration control effect on a structure in different construction phases under different use conditions and different intensities of imposed loads.

Description

technical field [0001] The invention relates to a tuned gas-liquid column damper and a structural vibration control system with dual adjustment functions of damping and frequency used in the structural vibration control fields of buildings, bridges, offshore platforms, power transmission towers and the like. Optimum effect on structural vibration control. Background technique [0002] High-rise buildings and long-span structures are prone to large vibrations under external forces such as wind, earthquake, and operating loads due to their high flexibility and low damping characteristics. It is an effective method to apply dampers to reduce vibration / vibration of the structure. . [0003] Tuned Liquid Column Damper (TLCD) is an effective vibration damping device developed on the basis of tuned liquid damper. The TLCD device is usually U-shaped and consists of two vertical sections and one horizontal section. , When the structure is subjected to external force, the liquid in ...

AI Technical Summary

Problems solved by technology

Existing improvements and researches on traditional TLCD are only aimed at a single factor in frequency or damping, and fail to have dual adjustment functions. The application range and application effect of TLCD are limited, and it is impossible to achieve different structural conditions and Optimal vibration damping / seismic effect under different loads

At the same time, the MR-TLCD proposed by Wang et al. has good performance in adjusting damping, but it is expensive and does not have the function of adjusting frequency. When the vibration frequency of the structure is far away from the natural frequency of the damper, the vibration reduction / seismic effect decreases significantly; The patent submitted by Wang Xiuyong (CN101070893A) only uses magnetorheological fluid in the horizontal section of the U-shaped tube, which reduces the amount of magnetorheological fluid. However, due to the strong nonlinear characteristics of the magnetorheological damper, in actual modeling and application It has limitations and does not have the function of adjusting the frequency

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