Design method of built-in paddle column tuned liquid damper

Abstract

The invention discloses a design method of a built-in paddle column tuned liquid damper, which comprises the following steps: S1, determining the optimal sloshing frequency and damping ratio of a TLD, and designing the size and water depth of the TLD; s2, constructing an equivalent mechanical model of a structure-TLD system, and carrying out sensitivity analysis on a TLD damping ratio under the action of wind loads in different return periods; s3, the number and the width of the paddle columns are designed, and a relation curve of TLD damping ratios and responses under different paddle column configurations is obtained through an empirical formula of the built-in paddle column TLD damping ratios; s4, calculating a damping ratio which can be provided by the TLD in a working state; s5, the difference between the damping ratio zeta w and the damping ratio theoretical optimal value zeta T in TLD work is calculated; and S6, a coupling system of the controlled structure and the full-scale TLD is established, and the actual vibration reduction effect of the TLD of the design scheme on the structure under the wind load effect is calculated. The implementation form is clear and simple, practical engineering application is facilitated, and the built-in paddle column tuned liquid damper can be designed more accurately and reliably.

Description

technical field [0001] The invention belongs to the technical field of wind-induced vibration control of high-rise buildings, and particularly relates to a design method of a built-in propeller column tuning liquid damper. Background technique [0002] Tuned Liquid Dampers (TLDs) are a very effective passive dynamic damper in high-rise building vibration control that can significantly reduce structure top acceleration and improve occupant comfort. The basic principle of TLD vibration damping is to use the liquid to absorb and dissipate vibration energy during the sloshing process to provide additional damping for the structure. [0003] The damping of pure water TLD is often small, and the vibration reduction effect provided to the structure is very limited. Therefore, it is usually necessary to set internal components to increase the sloshing energy consumption of the liquid. Among them, the propeller column is one of the commonly used energy consumption devices. The numbe...

AI Technical Summary

Problems solved by technology

[0004] Among the above methods, method 1) simplifies the complex liquid sloshing problem based on the assumption that the damping ratio of the built-in propeller column TLD is proportional to the response, but the research shows that there is an obvious nonlinearity between the TLD damping ratio and the response, so this linear Traditional methods cannot accurately assess the effect of TLD control

Method 2) It is necessary to pre-fabricate the propeller column for testing based on past experience. If the damping ratio does not meet the requirements, redesign the propeller column and test again, which is costly and time-consuming.

In addition, due to the limitations of the shaking table, it is difficult to check the vibration reduction effect of the full-scale TLD on the structure

Images