- 學位論文
碳纖維貼片防治混凝土牆開孔處角隅裂縫之研究
The study of corner strengthening of concrete wall using CFRP sheets
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摘要
纖維貼片材料在國內外土木結構之補強工程大量使用，技術已逐漸成熟。但在其應用及相關設計理論和施工法，尚有極大的發展空間，基於此，本研究即針對建築業者所困擾的牆孔角隅裂縫，進行防治技術開發及研究。試驗方法主要利用破壞力學三點彎曲試驗之載重配置方式；使試體預裂產生單一的真實裂縫面，作為碳纖維貼片修補效果檢驗之用。檢驗項目包含經三點彎曲試驗後的開口變位圖及顯微照片，將不同碳纖維貼片尺寸之試體，歸納整理後找出最佳尺寸及貼片方式。 本研究試驗結果發現在開口變位圖與顯微照片，雖然碳纖維貼片面積相同但尺寸600mm×50mm碳纖維貼片不管在有無鋼筋試體都比尺寸400mm×75mm碳纖維貼片有更高的承載強度，且雙面貼片初始裂縫強度比單面貼片試體來的高。
並列摘要
CFRP is used mostly in retrofit the damaged concrete in both domestic and foreign. The technology is getting more mature since more engineers are familiar with this material in rehabilitation of concrete structures. However, its application and the related design theory still need to be developed. This study aims at using CFRP to strengthen the corner crack resistance of concrete wall. A testing configuration in three-point bending with a right angle notch on the center of a concrete specimen is employed in this experimental program. Various dimensions in CFRP were designated to strengthen the concrete corner. The initial crack was arrested using a digital microscopy crack and the crack propagation was being monitored by a crack-mouth-opening-displacement. The test results from the crack displacement diagram and the electron micrograph showed that the CFRP sheet with a dimension of 600mm×50mm has higher cracking load than that of 400 mm × 75 mm, no matter whether an steel bar was embedded or not. In addition, the former one has higher loading strength than the latter one. The specimen being strengthened with two sheets on both sides appears more stable in stress development than that being strengthened with one side.
參考文獻
2. Griffith, A. A., “The Phenomena of Rupture and Flow in Solids,” Phil. Trans. Roy. Soe., A221, pp.163（1921）。
3. Irwin, G. R., “Analysis of stress and Strain Near the End of Crack Traversing a Plate,”J.Applied.Mechs.,Vol.24, pp.361-364（1957）。
6. Broek, D., “Elementary Engineering Fracture Mechanics,”4th Edition, Martinus Nijhoff, Hingham, Massachusetts, (1987)。
13. 李有豐，朱國棟、張國鎮、黃震興、王仲宇，「FRP複合材料補強橋墩設計準則之研究」，委託單位：交通部科技顧問室，執行單位：財團法人臺灣營建研究院，1999年10月。
17. Mirmirall, A. and M. Shahaway, “Behavior of Concrete Column Confined by Fiber Composites,” Journal of Structural ngineering,Vol.