Study On Vibration Control With Tuned Liquid Damper For Highrise-Structure Under Horizontal Seismic Action

Structure vibration control has opened a new way for suppressing the vibration of engineering structures under seismic and wind. Tuned liquid damper, as a passive control device, has its advantage of low cost, high reliability and so on. Therefore, it was applied widely in wind vibration control of towering and high-rise structure. And it has achieved good control results. But the damage of the earthquake for high-rise structure is larger than wind. The technique of high-rise structure seismic vibration control by TLD is not perfect now. Recent research always only foucs on the TLD's effect under unidirectional horizonal seismic wave. In this paper, TLD system is modeled by Ansys and researched under bidirectional horizonal seismic wave. The factors which affect the effect on seismic control of high-rise structure by TLD have been analyzed. Moreover, the comparison between the results of situations under unidirectional horizonal seismic and bidirectional horizonal seismic has been made. The main contents are as follows.In the preface, the vibration problem of high-rise structure and the research on the structure vibration control are summarized systematically, introducing mainly the research on TLD. The contents and methods in this thesis are set forth, on the basis of understanding the current situation of dependent research fields.In the chapter 2, the calculation method on the interaction of TLD and the structure is researched. The mechanism of reducing vibration and the analysis method of TLD system has been introduced and concluded. And the part of analysis method of TLD system focus on two comparatively perfect analysis method: lumped-mass method and shallow-water wave theory. The lumped-mass method is the theoretical support of the next two chapters.In the chapter 3, the high-rise buildings-TLD system studied been simplified as story model, and time-analyzed by the compute program designed according to Newmark method with matlab, results of the TLD system with different parameters have also been studied. This chapter's research is mainly on the effect of TLD system under unidirectional horizonal seismic.In the chapter 4, TLD system is modeled by Ansys, and researched under both bidirectional horizonal seismic wave and unidirectional horizonal seismic wave. The results have been compared and analysed, and some useful regulation which may be referred in practical design are obtained based on the study above.In the conclusion and prospect, the main achievements of this thesis are summed up and the unsolved problems are mentioned.