本文針對建築物之實際振動記錄分析其自然頻率與阻尼比，資料來源共分為結構 強迫振動實驗、地震記錄與風震記錄分析三個部分。一、結構強迫振動實驗，將振動產生器 置於某大樓的屋頂，激振建築物，並分析其振動反應。二、對地震記錄之分析，本文提出一 分析強震末期自由振動反應之自然頻率與阻尼比方法，稱為頻譜參數法。三、以颱風侵襲時 建築物振動記錄為分析對象，以頻譜疊加法處理風震記錄後，再以頻譜參數法分析。由分析 結果發現阻尼比與自然頻率關係不大，但與結構系統與結構所受外力有關。不同的結構系統 中，鋼結構的阻尼比最小，RC 構架＋剪力牆結構系統次之，RC 結構的阻尼比最大。

　　　　　This paper examined building vibrations by different sources, namely forced harmonic vibration, earthquake vibration, and wind vibration. Analytical methods to identify natural frequency and damping ratio were developed. When buildings were excited by forced harmonic vibration, response of buildings can be characterized by their steady-state response. The dynamic property of buildings were estimated from the calculated transfer functions. When buildings were excited by earthquakes, vibrations after strong motion duration can be treated as free vibration and the dynamic characteristics calculated by the proposed Spectrum Parameter Method. When buildings were excited by wind forces, the spectrum of the free vibration of buildings can be calculated from the proposed Spectrum Superposition Method, and the dynamic properties be derived by the Spectrum Parameter Method.