本研究主要對於底部裝設掣震避振器的機械進行耐震評估。研究內容分為基本元件性質探討、系統行為研究以及耐震評估四方面，各項之研究內容如下：
一、掣震避振器之檢測與改善：
掣震避振器必須先有隔振之效果，才能進一步檢討其是否具有耐震之性能，因此先檢測隔振機械是否合乎基礎隔振原理，以及不合乎時所提出的改良方案。

二、基本元件性質探討：
主要研究對象為掣震避振器內部的彈簧及橡膠片之力學特性。以能量法推導彈簧之縱向及側向剛度，並以試驗進行驗證；至於橡膠則以試驗分析其剛度與阻尼特性。

三、系統行為研究：
製造混凝土塊模擬常見之隔振機械，並以動力千斤頂及地震模擬台分別進行靜力及動力試驗，觀察系統受力後之運動行為，以便了解地震時隔振機械之破壞模式。

四、系統的耐震評估：
提出隔振機械抵抗地震力之評估方法以選擇適當型號之掣震避振器進行安裝，並建立合理的設備物隔振設計與耐震評估流程。

This research is to evaluate the seismic capacity of YS-AR Seismic Isolators&Snubbers. This research work can be categorized into four parts and is described as followings：
1、Checking and improving of YS-AR Seismic Isolators&Snubbers
YS-AR Seismic Isolators&Snubbers should have the effective vibration isolation capacity first , and then the strength against earthquake can be discussed. First, the motion of base-isolated machine has to match the principle of vibration isolation. When mismatch was found, an improving method was suggested.
2、Basic property investigation
The part emphasize the mechanical characteristics of springs and rubber inside YS-AR Seismic Isolators&Snubbers. Energy method is used to deduce the axial and lateral stiffness of springs. Experiments were carried out to verify the analytical results. And a series of experiments analyzed the stiffness and damping characteristics of rubber.
3、System behavior invertigation
A concrete block simulating Base-isolated machine was made and tested on an actuator and a shaking table to compare with the numerical analysis. Possible damage patterns were developed based on findings from this experiment.
4、System seimic evaluation investigation
Several evaluation methods were proposed to evaluate the strength of base-isolated machines against earchquake in order to choose appropriate type of YS-AR Seismic Isolators&Snubbers. A flow chart to evaluate seismic capacity of isolations was developed.

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