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題名 | A Numerical Model for the Fire Response of Steel Structures=鋼構架受火反應之解析模式 |
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作者姓名(中文) | 邱耀正; | 書刊名 | 中國工程學刊 |
卷期 | 14:4 1991.07[民80.07] |
頁次 | 頁397-406 |
分類號 | 441.574 |
關鍵詞 | 火; 鋼構架; |
語文 | 英文(English) |
中文摘要 | 本文提出無防火護層之鋼構架在已知受火環境下反應之定量評估方法。文中以樑 一柱理論建立分析模式,而桿件之溫度分佈則採用標準溫度延時曲線計算,然後應用勁度法 與時間增量法作數值解析。 數值計算結果顯示鋼構架在受火情況下之破壞受桿件溫度變化與載重控制。火害引致結構產 生熱應變,潛變,與塑性變形,而潛變效應則在高溫時相當顯著。當結構物受火害之歷程己 知,則本文提出之方法可預估結構之耐火時效。 |
英文摘要 | A method for quantitative evaluation of the response of unprotected steel frames exposed to a prescribed fire environment is presented. The beamcolumn theory is applied to formulate the analytic model, and the fire load specified by the standard fire curve is adopted for the temperature computation. The stiffness method with time increment is used for the numerical solution. The numerical results show that the collapse of a steel frame in a fire environment is controlled by the temperature variation as well as by the structural load. The fire loads induce thermal strain, creep, and plastic deformation of the structure. The creep effect becomes dominant when the structural temperature is high. The effective fire resistance time of the steel frame corresponding to a fire load history can be computed. |
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