本研究以乾式金屬骨架輕隔間防火牆為試體，藉由1次受火面積為300cm×300cm之牆體標準防火時效測試及有限元素數值模擬，2次受火面積為100cm×100cm之牆體標準防火時效測試及有限元素數值模擬，量化評估了接線盒嵌入乾式金屬骨架輕隔間防火牆後對其防火性能的影響。實驗結果顯示，由於內部金屬接線盒導熱係數較高而導致其背火面升溫較快；一般接線盒面板材質為PVC在受熱時會軟化脫落，影響防火牆之完整性，也導致熱量會快速傳遞至背火面處；有限元素數值模擬預測與實體試驗結果高度相關；接線盒背後增添矽酸鈣板，並改用金屬面板的方式可以有效的補強原有弱點，背火面升溫最高處接線盒表面處溫度下降最為顯著，補強後下降了72.9℃；補強後該乾式金屬骨架輕隔間防火牆體嵌入接線盒後達到1小時防火時效。

The research uses the metallic-framework drywall as the specimens, with standard fire test and finite element simulation on 300 cm × 300 cm area specimen for ones and 100 cm × 100 cm area specimens for twice, to quantify and evaluate the effect of the junction boxes on the fire-proof property after being embedded into the light partition wall. The results of experiment show that temperature of unexposed surface rises faster due to the higher thermal conductivity of internal metal junction box; the general junction box whose material is PVC can be softened off when heated, affecting the integrity of the firewall and also leading to rapid transfer to the unexposed surface; the prediction of finite element simulation temperature is highly correlated with the results of the real experiment; It is effective to strengthen the original weaknesses with adding calcium silicate board behind the junction box and using metal panels instead of PVC; The temperature of the Temperature Junction Box surface which is the highest temperature point of unexposed surface decreased most significant with 72.9℃ after the reinforcement ; in addition, after reinforcement, the fire resistance time can reach to 1 hour by inserting the junction box into the light partition wall.

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