本研究參考CNS12514性能驗證方法，針對實尺寸箱型式輕鋼構箱體單元進行火害實驗，並由實驗中所得到梁、柱桿件之溫度作為數值模擬之溫度邊界條件。實驗體係由研究單位自行雇工，施作裝修材以完成本實驗體，因此實驗構造並不代表坊間相同或相似構造體之防火性能。
由於箱體單元之斷面並不存於CNS12514所規範之列，因此實驗所需量測點之數量與位置依照實際箱體進行調整。量測之對象包含樑、柱桿件、火場空氣溫度、受火面以及非加熱面等，將透過所得到之數據與現有規範進行比對，
本研究選用ANSYS作為數值模擬軟體，鋼材在高溫下之材料性質則參考EUROCODE 3。考慮不同邊界條件，雙層箱體單元於高溫環境下結構行為間之差異，比較同樣升溫下，載重條件與束制條件對箱體結構行為之影響；並根據實驗與數值模擬所得到之結果作出結論，以及針對未來複合箱體單元之接合、火場數值模擬之可行性、開放式箱體單元之驗證方法作出建議。

In this research, box element light gauge steel structure is verified by full-scale experiment. With the reference of CNS12514, the surface temperatures of both beam and column members would be used as the boundary conditions of numerical analysis. The adopted fire resistant facility couldn’t regard as the exact or similar structural function through street stalls.
Because of the adopted cross-section is not one of the types listed in CNS12514, the placement and amounts of the thermal couples are being adjusted. The acquired statistics will be verified with existing regulations.
Taking the differences under variant boundary conditions into consideration, the behavior of two-stack element light gauge steel structure was studied at elevated temperature using the ANSYS finite element software. Degradation of steel properties with increasing temperature was assumed in accordance with EUROCODE 3. Comparison of the affection between load and fix condition under fire is also being conducted.

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