內政部建築研究所委託成功大學土木工程系，共同於成功大學歸仁校區內興建大型戶外研究設施，包含長18公尺、寬12公尺的實驗平台及在其之上長、寬12公尺、單層樓高4公尺的實尺寸鋼構實驗屋。實驗平台上部與下部結構間由12顆劦承精密所製之CC-SB150盤式支承墊作為連結。
歷年來針對實尺寸鋼構實驗屋之局部梁、柱進行多次火燒實驗，藉以探究火災對鋼構架結構物所產生的影響。在各次火害實驗前後，利用成功大學土木系之MK-155U離心質量激振系統作為外部激振力，對鋼構實驗屋進行系統掃頻，改變激振質量塊的重量及實尺寸鋼構實驗屋頂樓的48個水桶內之水量，進行多次動態實驗。量測平台一樓與鋼構實驗屋頂樓的反應，根據系統識別之理論，對量測之訊號結果作後續處理與分析，識別出結構基本振動頻率。
本文詳加論述各次火害實驗之實驗環境，及各次動態實驗在現地遇到的狀況和擷取到的實驗訊號出現的各種狀況。針對不同的狀況該如何作處理也在本文做完整的說明。參考各項訊號處理的過程，本文建議一套火害前後鋼構屋結構基本振動頻率識別作業流程。將其應用在不同量測擷取系統所得之實驗訊號結果，驗證此流程對所有量測擷取系統的適用性。
最後，由各次火害實驗及動態實驗所獲取的經驗，對未來相關實驗提供適當建議。

Researchers from the Architecture and Building Research Institute (ABRI) of Taiwan and the Department of Civil Engineering of National Cheng Kung University (NCKU) built a large outdoor fire research facility at the Kuei-Jen campus of NCKU. It includes a platform which is 18 meters long and 12 meters wide, and a 4 meters high single-story full-scale steel building which is 12 meters long and wide. There are 12 low-friction pot bearings installed between the platform and the raft foundation. To investigate the behavior of steel buildings exposed to fire, the full-scale steel building has gone through several fire experiments, which were designed to expose the local beams or beam-column joints to fire. Before and after each fire experiment, forced-vibration experiments are performed. In the forced-vibration experiment, the MK-155U Eccentric Mass Shaker System provides external force to the full-scale steel building in different frequencies. The accelerations of the isolated platform and the roof of the full-scale steel building are measured. According to the theory of system identification, the signals of the measurement are able to identify the fundamental frequency of the full-scale steel building. This thesis depicts the experimental environment of each fire experiments, as well as each forced-vibration experiments. And how to deal with different signals is also explained in detail. At last, we set up a standard operating procedure for fundamental frequency identification of full-scale steel building exposed to fire. Apply it to the experimental signals obtained by different measurement systems to verify the applicability of this process to all measurement systems.

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