Investigation On Control Performance Of Tuned Liquid Damper By Shaking Table Substructure Test

Modern structures become larger and more complex than before. In order to improve the dynamic performance of these structures, new kinds of vibration control devices have been emerged and applied for decades. Tuned Liquid Damper(TLD) is one kind of passive vibration mitigation system. The performance of structures with TLD are normally investigated by numerical simulations and shaking table tests. However, the accurate numerical model of sloshing water for TLD is difficult to determined, and the traditional shaking table test method is only suitable for small-scale model experiments so as to difficult to truly reflect the performance of prototype structures. Therefore, this paper proposes shaking table substructure testing method for investigating the control performance of TLD. The main contests and conclusions are as follows:1. The shaking table substructure testing method is proposed for investigating the seismic performance of structures with TLD. The corresponding hardware and software experimental systems are introduced, and the control performance of TLD is simulated. It is shown that the proposed shaking table substructure testing method for investigating the control performance of TLD is theoretically feasible, and the stability of Central Difference Method for dynamic substructure testing is influenced by the mass participation factor of liquid in TLD.2.The effectiveness of the proposed shaking table substructure testing method is verified by comparing the results from shaking table test and shaking table substructure test of three stores structure with TLD. It is shown from the comparison results that the proposed shaking table substructure testing method is feasible and has good performance in term of accuracy.3. The control performance of TLD is investigated by the proposed shaking table substructure testing method. The influence of liquid height, mass ratio, seismic category and amplitude on control performance of TLD are verified in the tests. It is shown that the TLD behavior excellent control performance when the vibration frequency of sloshing water matches the theoretical optimal frequency, the acceleration control performance of TLD is increased with the increase of mass ratio of experimental substructure to numerical substructure, and no obvious conclusion can be found from the tests comparison among different categories of earthquakes and among different amplitudes of earthquakes.