對於隔震橋梁，如何有效的控制其位移是非常重要的，良好的隔震結
構必須於剪力與位移之間取得一最佳的平衡點，本研究提出一種使用於橋
梁結構之消能系統，此系統包括線性液體阻尼器以及產生槓桿作用之剛性
連桿，稱為增效式阻尼裝置。研究中首先以理論推導，證明此裝置具有降
低橋梁上部結構相對位移之優異效果，然後進行橋梁承受強烈地震反應之
數值計算，並瞭解各種參數之影響，最後以實際的橋梁計算例分析此裝置
之耐震能力。研究結果顯示此種消能系統不但可大量降低隔震或未隔震橋
梁之上部結構相對位移，且可大量降低橋墩基底剪力，故此種消能系統除
可應用在新建橋梁上，並可供補強現存耐震能力不足橋梁之用。本文之另
一個重點是提供一化簡的單自由度方程式，並以有限元素模型以及多自由
度化簡方程式之分析結果作為比較，證明於一定的條件下，化簡的單自由
度方程式具有足夠的精度，可提供作為耐震工程之應用。

An energy dissipating device system for bridges is
proposed in the prese-ntstudies.The system consists of linear
fluid dampers and relatively rigid lin-king members with
leverage. The effectiveness of this system in terms of reduc-
tion of the relative displacement of the superstructure of
bridges is proven a-nalytically first. Then the dynamic
responses of bridges with/without base iso-lation, subjectedto
strong ground motions, are computed numerically. It is fou-nd
that not only the maximum relative displacement but also the
maximum base s-hear can be reduced significantly when the device
system has been used on the bridge. Therefore, it is suggested
that this device system be applied in the d-esign of new bridges
as well as in retrofitting of existing bridges with inade-quated
aseismic strength.