Real-time hybrid tests of structures with a tuned mass damper using shaking table
This study proposes a real-time hybrid test system of structures with a tuned mass damper(TMD).The TMD is tested on a shaking table as a physical structure and the main structure is simulated in a DSP of a computer.A magnetorheological(MR)damper is used to produce a damping force that is proportional to the damper velocity by adjusting the electric current.Test results show that the shaking table can be accurately moved according to the target command,by comparing the commanded displacement calculated by DSP and the measured displacement reproduced on the shaking table.To investigate the validity of the test system,pure simulations based on analytical models of the entire structure and real-time hybrid tests are compared.The results indicate that the responses of the pure simulations and the hybrid tests are in agreement; therefore,the real-time hybrid test system and the damper model in the simulation are validated.The effectiveness of TMD was analyzed by comparing the results of models with and without TMDs using different mass ratios and damping ratios.The TMD reduced both floor acceleration and displacement of all floors of the main structure.The TMD is effective for reducing responses in five different types of ground motions including pulse-like and long-period ground motions.Additionally,it is observed that the TMD with a larger mass ratio needs a larger damping ratio and the TMD with the optimum-damping ratio obtained from the Den Hartog method is the most efficient for reducing responses of the main structure.
Tuned mass damper Real-time hybrid test Simulation
M.Ito H.Fujitani M.Okano K.Nishikawa G.Mosqueda
Organization of Advanced Science and Technology,Kobe University,Japan Department of Architecture,Kobe University,Japan Department of Structural Engineering,University of California,San Diego,USA
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
1263-1272
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）