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標題: 人行橋動態行為暨多元調諧質量阻尼器之減振
Vibration Reduction of Footbridges Using Multiple Tuned Mass Dampers
作者: Johane Dorcena
關鍵字: 人行橋
Pedestrian Bridge
Vibration reduction
Stationary loads
Moving loads
Uniform loads
Multiple Tuned Mass Dampers
Dynamic response.
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摘要: As the pedestrian bridge conception, from now, expands more in the length span whereas the cross section becomes slender and simple, multi-mode coupled vibrations occur frequently. The footbridge, a slim structure, becomes more sensitive to vibration effect. It is clearly understood that the vibration could be a problem. The users of this public facility should be comfortable while using it. Some endeavors have been done to lessen the vibration that is additional stiffness to the given devices. The most optimistic method to reduce vibration and improve the footbridge dynamic characteristics is Multiple Tuned Mass Dampers (MTMD). This study covers vibration reduction of footbridge using Multiple Tuned Mass dampers. The Footbridge is modeled and simulated numerically using the commercial structural analysis and design software (SAP2000) to perform dynamic responses due to pulsating stationary, moving and uniform loadings. A comprehensive Optimization method is introduced to determine the optimal design parameters of MTMD system. The objective is to minimize footbridge responses and remove unacceptable requirements, such as peak and root mean square (RMS) acceleration. Numerical analysis shows that the proposed MTMD designed by the annealing optimization procedure is effective in reducing dynamic response during crowd–footbridge resonance.
文章公開時間: 2017-08-08
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