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系統識別號 U0026-2008201123425800
論文名稱(中文) 高溫下鋼結構潛變行為之研究
論文名稱(英文) The Creep Behaviors of Steel Structures at High Temperatures
校院名稱 成功大學
系所名稱(中) 土木工程學系碩博士班
系所名稱(英) Department of Civil Engineering
學年度 99
學期 2
出版年 100
研究生(中文) 倪瑋豪
研究生(英文) Wei-Hao Ni
學號 N66981012
學位類別 碩士
語文別 中文
論文頁數 151頁
口試委員 指導教授-鍾興陽
口試委員-朱聖浩
口試委員-賴啓銘
口試委員-王雲哲
口試委員-連寬宏
中文關鍵字 向量式有限元素法  潛變  潛變挫屈  鋼結構  高溫 
英文關鍵字 Vector Form Intrinsic Finite Element  Creep  Creep Buckling  Steel Structure  High Temperature 
學科別分類
中文摘要 鋼材在高溫中受潛變的影響會造成變形明顯增加,故潛變對鋼結構在高溫下結構行為之影響是相當重要,本文以加入溫度效應和潛變效應的向量式有限元素法來研究平面鋼結構在高溫環境中受潛變效應的結構行為,並透過相關文獻的試驗與數值分析結果與本文所建立之分析模式進行驗證,以確保所建立之分析模式的正確性;接著再利用本文所建立之數值分析模式,分別探討高溫環境下梁桿件與柱桿件在不同載重比與邊界條件下,桿件因潛變而造成破壞的過程,桿件破壞將以桿件挫屈或潛變變形達到規範規定之潛變破壞準則為判定依據,最後再探討平面鋼構架在高溫中因潛變所造成的影響。
英文摘要 In high temperatures, the deformation of steel increases noticeably due to creep effect, so creep effect is very important for the structural behaviors of steel structures in high temperatures. In this study, the Vector Form Intrinsic Finite Element (VFIFE) method with thermal effect and creep effect was employed to investigate the structural behaviors of plane steel structures in high temperatures. The correctness of the numerical analysis model developed using the VFIFE method was verified by comparing the results with the test and numerical results of the related references. Using the developed numerical analysis model, the failure processes of steel beams and steel columns due to high temperature creep effect under various load ratios and boundary conditions were investigated. The failures of structural members were determined by member buckling or by the creep deformation reaching the failure limit of the code. The structural behaviors of plane steel frames due to the influences of high temperature creep effect were also investigated in this study.
論文目次 摘要 I
Abstract II
誌謝 III
目錄 IV
表目錄 VII
圖目錄 VIII
符號表 XV
第一章 緒論 1
1.1 研究動機 1
1.2 研究目的 2
1.3 研究方法 3
1.4 文獻回顧 3
1.4.1 高溫試驗及分析 3
1.4.2 潛變模型 4
1.4.3 潛變分析 5
1.4.4 潛變試驗 5
1.4.5 向量式有限元素法 6
1.5 論文內容與架構 7
第二章 鋼鐵之高溫材料性質 9
2.1 前言 9
2.2 高溫環境下鋼材性能資料 9
2.2.1 降伏強度與彈性模數 9
2.2.2 熱膨脹係數 14
2.2.3 單位質量 15
2.3 潛變行為 15
第三章 含溫度與潛變效應之向量式有限元素法 29
3.1 向量式有限元素法 29
3.1.1 基本假設 29
3.1.2 移動基礎架構與基本方程式 30
3.1.3 虛構反向剛體運動 33
3.1.4 含溫度與潛變效應之平面剛架元素節點內力 34
3.2 數值分析模式之驗證 41
3.3 數值分析模擬鋼材之潛變試驗 43
第四章 高溫環境下鋼梁之耐火行為分析 56
4.1 高溫環境下鋼梁不含潛變分析 56
4.1.1 簡支承鋼梁之臨界溫度分析 58
4.1.2 兩端鉸接梁之臨界溫度分析 58
4.1.3 含軸向彈簧鋼梁之臨界溫度分析 59
4.2 高溫環境下鋼梁之潛變行為 60
4.2.1 簡支梁受潛變之行為 61
4.2.2 兩端鉸接梁受潛變之行為 62
4.2.3 含軸向彈簧鋼梁受潛變之行為 63
4.2.4 小結 64
第五章 高溫環境下鋼柱之耐火行為分析 88
5.1 高溫環境下鋼柱不含潛變分析 88
5.1.1 簡支柱之臨界溫度分析 90
5.1.2 兩端鉸接柱之臨界溫度分析 90
5.1.3 含軸向彈簧鋼柱之臨界溫度分析 91
5.2 高溫環境下鋼柱之潛變行為 91
5.2.1 簡支柱受潛變之行為 92
5.2.2 兩端鉸接柱受潛變之行為 93
5.2.3 含軸向彈簧鋼柱受潛變之行為 94
5.2.4 小結 95
第六章 高溫環境下鋼構架之耐火行為分析 109
6.1 高溫環境下鋼構架不含潛變分析 109
6.1.1 單跨雙層之臨界溫度分析 109
6.1.2 五層三跨之臨界溫度分析 110
6.2 高溫環境下鋼構架之潛變行為 111
6.2.1 單跨雙層受潛變之行為 111
6.2.2 五層三跨受潛變之行為 112
6.2.3 小結 113
第七章 結論與建議 141
參考文獻 144
附錄A 149
附錄B 150

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