The performance of TLD in displacement response reduction of structures under harmonic analysis

Among passive controlling systems, tuned liquid damper (TLD) is a device that many researchers have investigated on its applications and effectiveness in three previous decades. TLDs in comparison with other controlling systems have many advantages such as the low cost in maintenance and simple installation. In this paper, several TLD models were simulated by finite element software in order to identify the role of a TLD in decreasing structure displacement response under a harmonic analysis. The methodology of this paper is divided into three parts. First, the fundamental frequency of each model was calculated numerically. In this study Housner formula was used in order to calculate the first sloshing frequencies of TLDs. Then, all of TLDs alone and attached to the structure were simulated in software. At the end, displacements response and frequencies of structures were recorded and results obtained were compared with each other. The output of the software about natural frequency showed that has good compatibility with the numerical method. It is concluded that, TLDs tuned with fundamental frequency of structure could reduce the structure displacement response.