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題名 | 填充混凝土方形箱型鋼柱之耐火性能=Performance of Concrete-Filled Steel Square Box Columns Exposed to Fire |
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作者 | 陳誠直; 林政億; 陳建忠; Chen, Cheng-chih; Lin, Jheng-yi; Chen, Chien-jung; |
期刊 | 中國土木水利工程學刊 |
出版日期 | 20160600 |
卷期 | 28:2 2016.06[民105.06] |
頁次 | 頁85-93 |
分類號 | 441.574 |
語文 | chi |
關鍵詞 | 填充混凝土; 箱型鋼柱; 耐火時間; Concrete-filled; Box column; Fire resistance; |
中文摘要 | 國內中高層建築普遍採用填充混凝土箱型鋼柱,惟其受火害的研究甚少。本研究目的在探討填充混凝土方形箱型鋼柱的耐火性能。製作十支大尺寸試體,進行耐火試驗,於軸向定載下承受標準升溫。試驗結果顯示試體的軸向變形歷時為受熱膨脹,而後受高溫強度衰減,試體軸向壓縮直至破壞。試體破壞主因為材料強度在高溫下的衰減,破壞模式為柱鋼板局部挫屈向外凸起與混凝土的被壓碎。軸向定載的大小明顯影響試體的軸向變形歷時與耐火時間,試體斷面大小與剪力釘則無明顯影響耐火性能。最後彙整試驗成果,提出填充混凝土方形箱型鋼柱的耐火時間預測公式,期有助益於防火性能設計。 |
英文摘要 | Concrete-filled steel box columns have been widely used in medium- and high-rise buildings in Taiwan; however the research of these columns in fire is limited. This study aims to investigate the behavior of the concrete-filled steel square box columns exposed to fire. Ten large-scale specimens were constructed and tested under constant axial compression and exposed to standard fire. The test results indicate that the axial deformation history of the specimens was the axial expansion owing to increasing temperature, and contraction due to the strength deterioration of the materials until failure. The failure was caused by the strength deterioration owing to elevated temperatures. The failure mode involved outward bulges of the steel plate of the column and crushing of the concrete. The magnitude of the constant axial compression highly affected the axial deformation history and fire resistance, but the size of the cross-section and shear stud had little effect on the fire behaviors. Based on the test results, an empirical formula was proposed to predict the fire resistance of the concrete-filled steel square box columns that will benefit the performance-based fire resistance design. |
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