本研究主要探討橋梁受車輛與地震載重作用所造成橋面板的振動反應，並期望尋找出適當的被動式調諧質量阻尼裝置(Tuned Mass Damper)設計參數以達到橋梁減振的目標。 研究中採用向量式有限元素法(VFIFE)建立結構動力數值模型，並在其中加入移動載重分析功能，將車體質量簡化為集中載重後再將移動載重以等值節點力的方式加入程式中進行分析，探討簡支型橋梁與連續型橋梁受到移動載重作用下之動態反應。在模型中加入TMD並調整其設計參數與配置方式後，針對橋面板減振效果加以討論。接著以一座三跨連續梁橋為目標橋梁，將TMD安裝於橋軸方向控制橋梁受地震作用下之位移反應，觀察結構物於線性與非線性的行為中，TMD設計週期之變化與橋梁位移控制效果之關係，最後比較TMD與黏滯性阻尼之減振功效。 經由分析結果得知，橋梁在受到車輛載重或是地震載重作用下，結構於線性與非線性階段中，均能夠找到合適的TMD設計參數有效的降低目標橋梁之振動反應。 ;This study discussed the dynamic response of bridges, which subjected to moving loads and earthquakes, and expect to mitigate the response of bridges by installing passive tuned mass damper (TMD). The purpose of this research is aimed to find the appropriate parameters for TMD to achieve the best performance of mitigating the dynamic response of bridges. Vector Form Intrinsic Finite Element Method (VFIFE) was used to predict the bridges subjected to moving loads, which was simulated by equivalent nodal force. The daynamic behavior of simple support beam and continuous beam subjected to moving loads were discussed in this study. Besides, dynamic responses with considering different parameters and configurations of TMD were also been investigated. A three-span-continuous bridge with TMD in axial direction is used to reducing the displacement of bridge which subjected to earthquake. The effects of displacement control with the relation between non-linear structures and design period of TMD had been discussed. The comparison between viscous damper and TMD were shown at last. The numerical results showed that the TMD can successfully reduced the dynamic response of bridges under moving loads or earthquakes while the structure is either in linear or non-linear behavior.
