| 研究生: |
洪瑋澤 Hung, Wei-Tza |
|---|---|
| 論文名稱: |
鋼筋混凝土梁柱複合構件於高溫中、後之行為研究─ 柱之承力行為 Behavior of Reinforced Concrete Beam-Column Sub-assemblage under Elevated Temperature Test ─Behavior of Column |
| 指導教授: |
方一匡
Fang, I-Kuang |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年: | 2008 |
| 畢業學年度: | 96 |
| 語文別: | 中文 |
| 論文頁數: | 135 |
| 中文關鍵詞: | 柱 、耐火性 、鋼筋混凝土 |
| 外文關鍵詞: | column, reinforced concrete, fire resistance |
| 相關次數: | 點閱:172 下載:1 |
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本研究之主要目的在探討實尺寸鋼筋混凝土梁柱複合構件在高溫中、後之結構行為,以期對相關建築物受火害之安全評估有所助益。
實驗研究方面,以四座實尺寸試體模擬外柱梁柱複合構件,分為四面及三面受火條件,梁柱複合構件依ISO834之標準升溫曲線加溫測試,主要量測之項目為試體在有加載的情形下,升溫及冷卻過程之變形,並測試其在高溫後之殘餘強度。在理論研究方面,利用套裝軟體ANSYS分析柱斷面內部之溫度變化及其側向變形。
主要研究成果如下:
1. 混凝土柱斷面溫度受縱向溫度之傳遞影響很小,故將斷面溫度預測簡化成2D模型分析,其溫度場應屬合理。
2. 由實測溫度可發現,柱試體內部溫度受水汽蒸散及爆裂之影響很大。
3. 在殘餘強度測試階段,四面受火的柱之曲率較三面受火之情況來的大,可能因四面受火柱混凝土爆裂較為嚴重。
4. 在殘餘強度測試階段,若不考慮殘餘變形時,柱之壓縮量與載重呈線性關係。
This research aims at the behavior of full- scale reinforced concrete beam-column sub-assemblage during and after the elevated temperature test. It’s very useful for the safety evaluation of fire damaged buildings.
In the experimental study, four full-scale specimens were constructed to simulate the exterior beam-column sub-assemblage. The specimens were installed in a furnace and exposed to fire test on the three and four sides, respectively, following ISO 834 temperature-time curve .
The primary objectives were to study the deformations of specimens during the heating and colling stages, as well as the residual strength test. In the analytical study, ANSYS program is used to predict the temperature distribution of cross section and the lateral movement of column.
The primary reslts of this research are as follows:
1. The 2D heat transfer analysis of the column can reasonablly predict the
temperature distribution of its cross section because the heat transfer in the longitudinal direction is negligible.
2. The spalling and vapour transportation significantly affect the temperature distribution of cross section according to the test results.
3. Based on the residual strength test, the curvature of the columns with four sides exposed to fire is larger than those with three sides expored to fire .
4. The load deformation relationship was almost linear during the residual
strength test if the residual deformation is not taken into account.
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