| 研究生: |
陳坤樟 Chen, Kurn-jang |
|---|---|
| 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─ 普通混凝土梁之承力行為 Behavior of Reinforced Concrete Beam-Column Sub-assemblage under Elevated Temperature Test ─ Behavior of Ordinary Concrete Beam |
| 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: | 141 |
| 中文關鍵詞: | 溫度 、火害 、混凝土 、梁 |
| 外文關鍵詞: | fire damage, reinforced concrete beam, concrete, temperature |
| 相關次數: | 點閱:105 下載:1 |
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現有的鋼筋混凝土結構耐火性之測試研究文獻,大部分都利用較小尺寸之試體或單一構件進行高溫中、後之測試,實尺寸梁柱複合構件之測試研究資料較為少見。本研究之目的在於探討鋼筋混凝土梁柱複合構件在高溫中、後之變形與強度變化。
本研究以實尺寸鋼筋混凝土梁柱複合構件探討梁在高溫中、後之變形與強度,同時利用ANSYS套裝軟體來預測梁柱複合構件內部溫度之分佈及高溫中結構之變形,並與實驗值對照。主要研究結果如下:
1. 在高溫測試中試體內部溫度升到100℃左右會出現升溫遲滯之現象,此乃混凝土內部游離水吸熱發生相變化所造成。
2. 梁柱複合構件在進行高溫測試30分鐘時,梁之撓度有明顯之增加量,Δ1、Δm及Δ2之變形分別為高溫測試前的345 %、249 %及
297 %。
3. 在服務載重作用下,梁在受高溫104分鐘後的Δ1、Δm及Δ2變形分別為高溫測試前的1.77倍、1.59倍及1.59倍。
4. 殘餘強度測試中,梁在受高溫104分鐘後的破壞載重為其在常溫時的77 %。
The available literature of the fire resistance test of reinforced concrete structure is mostly based on the tests performed by the smaller scale specimens or single component. As for the tests of full scale beam-column sub-assemblage under elevated temperature, it is very rare. This research aims at the deformation and strength of reinforced concrete beam-column sub-assemblage during and after the elevated temperature test. In the experiment all study, tests with full scale beam-column sub-assemblage were conducted. In the analytical study, the ANSYS software was used to predict the inner temperature distribution and deformation of beam-column sub-assemblage under elevated temperature. The results of prediction were compared with those from the experiments. The primary results are summarized as follows:
1. The temperature increase was delayed as the inner temperature of specimen increased up to about 100℃. This is because of the heating of inner free water of reinforced concrete, which induced the phase change of water.
2. The deflection of beam increased significantly when the beam-column sub-assemblage was subjected to the elevated temperature test for 30 minutes. The deflections of △1, △m, and △2 are 345 %, 249 %, and 297 % , respectively of those before the elevated temperature test.
3. Under the service load, the deflection of △1, △m, and △2 of beam subjected to elevated temperature test for 104 minutes are almost 1.77, 1.59, and 1.59 times of those before the elevated temperature test, respectively.
4. On the test of residual strength, the failure load of NC3 specimen after being subjected to elevated temperature test for 104 minutes is 77% of that in the room temperature.
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