VIBRATION CONTROL OF METAL SPATIAL STRUCTURES WITH TUNED MASS DAMPERS

In this paper, we introduce our recent studies on vibration control of metal spatial structures using three passive additional-mass-type vibration-control devices, especially TMDs, and confirm their control performance under seismic loadings by both analytical and experimental methods. Firstly, to effectively control spatial structures that have different vibration properties than multi-story frame structures, we propose a spatially distributed MTMD method. This method is characterized by controlling plural modes with closely spaced natural frequencies based on the robust property of the MTMD against variation of natural frequencies. Next, we propose a TMD-with-initial-displacement method to improve transient response. Then, we describe a shaking table test using TMD models and compare test results and analytical results. Lastly, we describe a method of applying a Houde damper system through a real construction project; the Eye of the Yellow Sea Pedestrian Bridge.