本文探討橋梁結構合併使用摩擦單擺支承及加勁阻尼器之隔減震系統，對提昇橋梁耐震能力之效果。對於隔減震橋梁而言，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最大剪力與最大相對位移之間取得平衡點，本文應用商用軟體SAP2000進行多重支承隔震橋梁的高度非線性行為分析。使用包括EL Centro、Mexico、Kobe、JIJI等地震為輸入，分別探討地震力輸入的方向對橋梁地震反應之影響，以及摩擦單擺支承隔震橋梁加設加勁阻尼器對進一步提升橋梁耐震能力之效果。研究結果顯示，規則性之隔減震橋梁，其地震反應對地震輸入方向並不敏感，又合併使用摩擦單擺支承及加勁阻尼器之隔減震系統有很好的減震效果，不但可以大量降低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及彎矩，故能大量提升橋梁之耐震能力，但因橋台所受剪力增加，應特別注意。 In the present study, the effectiveness of the compound system, consisting of the friction pendulum bearing (FPS) and the added damping and stiffness device (ADAS), on bridges in terms of reductions of earthquake responses has been investigated numerically. The program “SAP2000” is used to analysis the dynamic responses of the bridge with multiple FPS and ADAS. The EL Centro earthquake, Kobe earthquake, Mexico earthquake, and JIJI earthquakes are used as excitations. The dynamic responses of bridge subjected to strong ground motions with different input directions are compared. It is found that the dynamic responses of a symmetrical bridge equipped with the compound system is not sensitive to the input direction of ground motions and the combining use of these devices on a bridge can largely reduce the relative displacement of the superstructure and the base shear of the pier. But the increased burden of the abutment after installation of the energy dissipation device system should be examined with care. In addition, the higher the stiffness of the abutment used the better the effect of response reductions obtained.
