研究生: |
陳竹陽 Zhuyang - Chen |
---|---|
論文名稱: |
大主筋預背作法之研究 Post-installed Grouted Large Bars for Longitudinal Reinforcement in Precast Construction |
指導教授: |
歐昱辰
Yu-Chen Ou |
口試委員: |
陳正誠
Cheng-Cheng Chen 洪崇展 Chung-Chan Hung |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 營建工程系 Department of Civil and Construction Engineering |
論文出版年: | 2014 |
畢業學年度: | 102 |
語文別: | 中文 |
論文頁數: | 103 |
中文關鍵詞: | 預製工法 、五螺箍 、大主筋預背 、反覆載重試驗 、抗震能力 、經濟效益 |
外文關鍵詞: | precast construction, 5-spirals, post-installed grouted large longitudinal bars, cycling loading text, seismic performance, cost effectiveness |
相關次數: | 點閱:283 下載:0 |
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本實驗進行一組實尺寸新型方鋼棒多螺箍柱與一組傳統型多螺箍柱(用以對照)之反覆載重試驗。傳統型柱因鋼筋續接需採用續接器,導致成本偏高,而採用大主筋預背作法,鋼筋續接器數量以及鋼筋根數產生人工成本降低,則可節約10%成本。並且五螺箍採用自動化機械加工製造,具有很高經濟效益,因此很適合應用於預製工法。試驗結果發現,方鋼棒柱之反覆載重遲滯迴圈曲線相當飽滿,方鋼棒柱之強度於位移比3.0%略有下降,而後則可持續穩定維持,且其韌性容量達到4.05,足夠滿足一般抗震需求。又方鋼棒柱在9.0%大變形狀態下,仍然具備穩定之強度,可以有效抵抗強震所引致之水平剪力,而不致於發生快速崩塌之情形。試驗發現,方鋼棒柱底部塑鉸區發揮了良好之韌性,該區混凝土僅有表面保護層剝落,五螺箍內部所約束之混凝土大致保持完好,且方鋼棒柱之主筋並無挫曲現象, 箍筋亦未發生斷裂。本研究成果顯示,方鋼棒柱具有良好約束混凝土能力且主筋方鋼棒不易挫曲,於位移比5.0%之前較傳統型柱具有相似之消能能力,可以成功應用於實際預鑄多螺箍柱。
This research studies on the seismic behavior of 5-spirals RC columns with post-installed grouted large longitudinal bars.The full-scale column with square rebars were texted with lateral cycling loading.The use of post-installed grouted large longitudinal bars will reduce the cost of top sleeves used for connecting rebars in the traditional columns.And applying the 5-spirals to rectangular RC columns is to take its superiority in concrete confinement and its efficiency in automatic production for the precast construction industry.The text results indicated that ,with large squarelongitudinal bars ,the cycling loading hysteretic hoops were capable of sustaining a drift angle to 9.0% radians.The strength had a drop when the drift angle approached 3.0% radians,and maintained to the end.In addition,the tests showed that plastic hinges at the bottom of the column had exercised outstanding ductility.Only the protective concrete cover in the area had spalled off.The concrete confined inside the 5-spirals had generally remained in good condition.The energy dissipation of the column with square rebars was similar to the traditional column.
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