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| 研究生： |
毛昶人 Mao, Chang-Jen |
|---|---|
| 論文名稱： |
鋼結構梁柱接頭區受火害行為研究 Fire Response of Steel Beam-Column Panel Zone |
| 指導教授： |
邱耀正
Chiou, Yaw-Jeng |
| 學位類別： |
博士 Doctor |
| 系所名稱： |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年： | 2009 |
| 畢業學年度： | 97 |
| 語文別： | 中文 |
| 論文頁數： | 214 |
| 中文關鍵詞： | 接頭區 、有限元素分析 、火害 、高溫試驗 、實尺寸 、鋼結構 、梁柱接頭 |
| 外文關鍵詞： | finite element analysis, panel zone, fire response, fire test, full-scale, beam-column connection, steel structure |
| 相關次數： | 點閱：113 下載：6 |
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鋼結構一向被視為是耐震性能最為優越的建築結構系統，因而廣泛使用於高樓結構中。然而鋼材本身對溫度的敏感性卻成為鋼結構致命的弱點，當溫度升高，鋼材性質如降伏強度、彈性模數等都將顯著下降。一般鋼材在溫度400℃左右，其強度即迅速降低，然而通常火災發生後20分鐘左右火場溫度即可高達800℃，可見鋼結構防火或抗火設計之重要性。
據觀察，梁柱接頭不僅影響鋼結構整體結構行為，鋼結構的主要破壞亦幾乎集中於梁柱接頭區，但因梁柱接頭區的力學行為複雜，現有鋼結構火害研究主要偏重於梁、柱單一構件及整體構架，梁柱接頭之相關研究仍處於剛起步階段。
本文應用ANSYS軟體建立鋼結構半剛性梁柱接頭於高溫環境下之結構行為數值分析模式，並與內政部建築研究所火害試驗結果比較，驗證該分析模式可準確預測鋼結構梁柱接頭火害行為。又為快速推求鋼結構梁柱接頭高溫行為，本文另採用EUROCODE 3建議之鋼材高溫基本性能資料，以建立之ANSYS分析模式進行一連串數值分析，歸納整理而得鋼結構梁柱接頭高溫行為估算式，可快速求得定溫加載及定載加溫（含梁柱三面、四面受火）情形下之接頭行為，供整體鋼結構承受火害有限元素分析時接頭部份模擬之用。
The sensitiveness to temperature of steel becomes a weakness for steel structures. Since the mechanical properties of steel decay significantly at high temperatures, the loading capacity of steel structures in fires will reduce intensively. The failure of beam-column joints frequently induces the collapse of steel structures. However, the behavior of steel beam-column connection at elevated temperatures is very complicated and it has not been fully studied.
This study investigates the fire response of steel semi-rigid beam-column moment connections made with H-shape beam and H-shape column. The general purpose finite element software ANSYS was adopted. The numerical model was verified by the full-scale fire tests implemented in the building fire laboratory center of the Architecture and Building Research Institute (ABRI) in Taiwan, and its results were found to agree well with experimental results.
The formula to estimate the behavior of steel semi-rigid beam-column moment connections at constant temperature was established from a series of ANSYS numerical analyses and was proved to be suitable for using in the increasing four-side-heated cases. Further, the estimating formula of the connection rotation caused by thermal expansion was established for the increasing three-side-heated cases.
The method that considers the influences of thermal expansion and loading (including self weight) conditions separately proposed by this study can provide for follow-up studying the behavior of steel structure in fire.
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校內：2012-08-12公開校外：2012-08-12公開