Application of tuned viscous mass dampers for seismic response control of industrial buildings coupled with mechanical equipment
摘要
Although the effectiveness of a tuned viscous mass damper (TVMD) as an inerter-based device for vibration control in civil structures has been thoroughly investigated, there is a lack of systematic research regarding the application of TVMDs for seismic response control of industrial buildings coupled with mechanical equipment. Therefore, this study proposes ungrounded and grounded TVMDs to effectively utilize the mass of the mechanical equipment and fully exploit the capabilities of the inerter element. An optimal design methodology is developed by pursuing the maximum effective damping ratio and seeking the most rational TVMD control scheme. Validation of TVMD control performance is conducted through time-history analysis based on 20 real seismic ground motions recommended by ATC-40, and by providing a barrel mixer industrial building as a real-life numerical example. The results show that both an ungrounded and grounded TVMD can effectively mitigate the seismic response of the primary structure. Compared to the traditional tuned mass damper (TMD), TVMDs can obtain improved control performance for a given equipment mass ratio. Moreover, an ungrounded TVMD and a TMD show similar working mechanisms that tend to release the displacement of equipment to keep their optimal state, whereas equipment displacement for a grounded TVMD should be strictly limited to provide sufficient anti-force.