The Aseismic Optimal Design Method And Application Of TLD And TMD

The tuned liquid damper (TLD) is a type of passive control devices with its advantages of low cost and high performances. It is one of the study focuses on the field of aseismic research for civil engineering. Because of the complexity of earthquake loading and the principles of TLD, there are still many problems of the theories and design methods of TLD being to be solved urgently using for suppressing seismic responses of structures. TMD is the one of earliest structure passive control devices to be applied for withstanding the high-rise construction tall and erect in the structure vibration control. Therefore, the TMD system obtains the structural engineering expert's approval early, used for control the wind vibration and the earthquake responded of the structure. So, TLD filled with shallow water is analyzed. The emphasis on this dissertation is studying the optimal design method of TLD and TMD its application for practical engineering. The main achievements are described as follows.(1)Establishes the dynamic equation of the TLD system and the TMD system separately, and this paper has established the dynamic equation of the TLD and the TMD hybrid system through the analysis.(2) Through the study, gives the TLD system and the TMD system's influence parameter, by means of the contrast, makes certain these parameters to the structural damping function.(3) Based on the assumption of the decoupling of structure's mode, the problem of multiple-degree- of - freedom ( MDOF ) -TLD system is simplified to a set of single-degree - of -freedom ( SDOF) - TLD system problems by the method of mode superposition . The practical optimal design methods of TLD for SDOF system are put forward through studying the aseismic principles of SDOF-TLD system. Meanwhile, the methods to assess the equivalent damping ratio of SDOF-TLD system is given too. Numerical examples show that the optimal design method can be applied to the analysis of TLD for suppressing seismic responses of structures.(4) The hybrid control scheme of TLD and TMD is studied. Numerical analysis shows that hybrid control method has the satisfied control performance and is applicable to the tall buildings. Meanwhile, it can save the cost of engineering.(5) The detail of TLD's optimal design for practical structures is described by the analysis of a practical engineering.(6) Summarized the research results in this thesis. The unsolved problems and further research work are mentioned.