| 研究生: |
楊毅凡 Yang, Yi-Fang |
|---|---|
| 論文名稱: |
鋼筋混凝土梁柱複合構件承受高溫之行為研究-梁柱接頭之承力行為 Behavior of Reinforced Concrete Beam-Column Sub-assemblage Subjected to Elevated Temperature-Behavior of Beam-Column Joint |
| 指導教授: |
方一匡
Fang, I-K |
| 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: | 2007 |
| 畢業學年度: | 95 |
| 語文別: | 中文 |
| 論文頁數: | 56 |
| 中文關鍵詞: | 轉動角 、剪力值 |
| 外文關鍵詞: | rotation, shear strength |
| 相關次數: | 點閱:92 下載:1 |
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本研究旨在探討鋼筋混凝土梁柱複合構件中之接頭在高溫中及高溫後之承力行為。
試驗工作共測試4個全尺寸梁柱複合構件試體,其中兩個為普通混凝土另兩個為自充填混凝土,在常溫中測試兩個試體,高溫中測試兩個試體。
根據測試結果:高溫試驗中,普通混凝土試體(NC)與自充填混凝土試體(SCC)的梁柱接頭在受到柱軸壓力下的垂直位移約為4mm,轉動角約為0.2度。高溫試驗中,NC試體的接頭在使用載重下的垂直位移約為常溫試驗中的4~6倍,轉動角約為7倍。在SCC試體的接頭,高溫測試3小時候接頭內部中心之溫度約為80。C,靠近梁端中心約5cm處的溫度約為100。C,接頭角落距離最外緣約6cm處的溫度約為400。C在NC1試體中根據公式計算之最大容許剪力值為2480kN,SCC1試體之最大容許剪力值為2716kN皆遠大於實驗值所計算出的接頭剪力。
The purpose of this research is to study the behavior of joint in a reinforced concrete beam-column sub-assemblage subjected to the effect of elevated temperature.
In the experimental work, 4 full scale specimens of reinforced concrete beam-column sub-assemblage were tested, including 2 ordinary (NC) and 2 self compacting (SCC) concrete specimens. Two of the form specimens were tested in room temperature and the other two were tested in the elevated temperature, the displacement and rotation of joint were measured using the instruments installed at both ends of spandrel beam.
The primary finding according to the test results are as follows:
1. The vertical displacement of joint of SCC and NC specimens in room temperature was about 4mm, and the rotation was about 0.2 degree.
2. The vertical displacement of NC joint tested in service lead and the elevated temperature was about 4~6 times of that tested in room temperature, where as the rotation in elevated temperature was about 7 times more.
3. For SCC joint subjected to three hours of elevated temperature test the temperature at it’s center was about 80℃, at the location 5cm near the center of longitudinal beam was about 100℃, and at the location 6cm near the corner was about 400℃
4. The shear strength of joint was also studied in which the maximum allowable shear strength based on the prediction of ACT318 Code was 2480kN and 2716kN for NC1 and SCC1 specimen, respectively.
1. Lie,T.T., and Celikkol ,B., “Method to calculate the Fire Resistance of Circular Reinforced Concrete Columns,” Materials Journal, ACI, January-February 1991, pp. 84-91
2. Tan,K.H., and Tao,Y., ”Fire Resistance of Reinforced Concrete Columns Subjected to 1-, 2-, 3-Face Heating,”Journal of Structural Engineering, ASCE, November 2004, pp. 1820-1828
3. Edwards, W. T. , and Gamble, W. L., “Strength of Grade 60 Reinforcing Bars after Exposure to Fire Temperatures,” Concrete International, ACI, October 1986, pp. 17-19.
4. 中國土木水利工程學會, ”混凝土工程設計規範與解說(土木401-92),”pp.15-14