鋼結構一向被視為是耐震性能最為優越的建築結構系統，因而廣泛使用於高樓結構中。然而鋼材本身對溫度的敏感性卻成為鋼結構致命的弱點，本文依實際試體尺寸進行的鋼結構梁柱接頭高溫受熱反應，以有限元素數值模擬模式來分析其高溫受熱中結構行為，並選用ANSYS為數值模擬工具；在材料組成律方面，因實際試驗用鋼材之高溫材料性質目前尚未測試，且國內相關資料亦不甚完備，本文先以歐洲規範EUROCODE 3高溫受熱環境下之鋼材性質資料以及CNS升溫曲線，並參考文獻量測之爐溫與鋼材表面溫度關係，以作為數值模擬分析之用，進而透過程式分析建立一整套有關國內鋼結構梁柱接頭之高溫受熱行為，藉以探討半剛接梁柱接頭之勁度-溫度關係，並以國內實尺寸鋼結構梁柱接頭試驗驗證本文分析模型之可行性。
本文主要敘述有鋼材高溫材料行為、數值模擬分析之建立與驗證以及兩種鋼結構梁柱接頭高溫受熱試驗之模擬，包含有定溫加載試驗與定載加溫試驗，主要以了解鋼結構接頭在高溫中其力學特性之影響參數以及非線性局部結構行為和熱膨脹所帶來之影響，以供後續研究整體鋼結構高溫受熱行為時之模擬分析使用。

The stiffness-temperature relation of semi-rigid beam-column moment connections in high temperature environment is studied. Degradation of steel properties with increasing temperature and the standard temperature-time relation in fire exposure were assumed in accordance with EC3 recommendations. The composed beam-column frame is analyzed by the general purpose finite element software ANSYS, and the stiffness-temperature relation of semi-rigid beam-column joint is established. The stiffness-temperature relation of steel beam-column joint has constructed in the current work.

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