近年來，輕鋼構建築在房屋設計上逐漸被廣泛應用，雖然具成本低、工時短等特性，在耐震上更具有其優越性，唯獨在高溫環境下，其材料強度會大幅減弱，因此有必要對其火場行為進行了解。
本文目的為利用數值模擬軟體探討廠房建築於高火載量時之火災行為，所有梁柱構件參數採用國內常見之SN490B鋼材與歐洲Eurocode之建議值。本文首先用FDS火災模擬軟體做實尺寸火場重建， 以求得模擬結果之溫度歷時。接著再利用有限元素軟體ANSYS進行耦合分析，參考CNS12514防火試驗法做性能上之評估。
由模擬結果可知，位於高火載量空間時，將使火災得以迅速擴大，燃燒所產生之高溫熱能與煙，持續蓄積於空間高處，使屋頂之梁柱系統產生嚴重變形，若此時消防人員破門而入控制火勢，外部空氣之灌入卻會使火勢加劇，讓火場溫度升高，廠房內大量的濃煙不僅阻礙視線，高溫更使屋頂板產生崩塌，造成廠內人員嚴重傷亡。

The purpose of this study is to investigate the behavior for industrial building with high fire loading density with computer numerical simulation software. In the beginning, the fire simulation software “FDS” was used to rebuild a model to simulate the scene of a fire. And then, based on the evaluation of CNS12514 fire test method, the transient thermal analysis in finite element method (FEM) model is performed by entering the predicted temperatures profiles with ANSYS software. The result shows that the fire will rapidly expand in a high fire load space. High-temperature heat and smoke generated from continuously burn will accumulate in top of space and made the roof severely deformed. When the firefighters broke into the fire scene to control the fire, the outside air will be drew into the space and exacerbate the fire. A large amount of smoke and high temperature will also make the roof collapse and cause more serious injury even death.

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