Tuned liquid dampers (TLDs) have received considerable attention as effective passive dynamic
vibration absorbers for controlling wind-induced vibrations in high-rise buildings. However, due to the complex
coupled response of the structure-TLD system, accurately evaluating the damping performance of TLD is
challenging. This study proposes a method to evaluate damping performance through the coupled vibration response.
First, a state space model of the structure-TLD system is built. Second, a state space technique is used to determine
the state matrix of the coupled system and obtain the modal frequencies, damping ratios, and mass ratios of the bare
structure and TLD. Third, damping performance is estimated by calculating the structural frequency response
function before and after TLD control on the basis of the identified parameters. Last, the proposed method is
validated preliminarily by using a numerical example and applied to the coupled vibration response of a 260 m high
rise building and TLD system. Results show that the identified values of the modal parameters are in good agreement
with the design values. The maximum absolute error of TLD damping performance estimated with the identified
parameters is only 4.7% compared with the results calculated by numerical simulations. These findings fully
demonstrate the accuracy of the method and the feasibility of its application to the performance evaluation of
structure-TLD systems with field measurements.
Lanfang Zhang — State Key Laboratory of Subtropical Building and Urban Science, South China University of Technology, Guangzhou, 510641, China
Zijie Zhou — 1)State Key Laboratory of Subtropical Building and Urban Science, South China University of Technology, Guangzhou, 510641, China 2)Guangzhou Jishi Construction Group Co. Ltd, Guangzhou, 510115, Chin
Zhuangning Xie — State Key Laboratory of Subtropical Building and Urban Science, South China University of Technology, Guangzhou, 510641, China
Lele Zhang — China Construction Seventh Engineering Division Corp., Ltd.
Houjun Huang — Guangzhou Jishi Construction Group Co. Ltd, Guangzhou, 510115, China
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