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碩士論文公告區 |
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| 年度： | 91 | |
| 姓名： | 梁暘鑫(Yang-hsin Liang) | |
| 論文題目(中)： | 碳纖維貼片補強受損混凝土之耐久性能測試研究 | |
| 論文題目(英)： | Durability of Strengthening Damaged Concrete Members Using CFRP Sheets | |
| 摘要(中)： | ||
| 結構物的補強是今日國內外土木工程界的重要課題。在這方面複合材料有著強大的潛力，而碳纖維貼片補強工法更是當前補強方法的新趨勢。許多的研究指出碳纖維複合材料能使用在維修與補強混凝土結構，然而，在其耐久性方面的研究卻是相當缺乏。碳纖維材料能否成功當作混凝土維修與補強的材料，耐久性是決定性的因素。 本研究探討碳纖維補強受損混凝土構件之耐久性。為了確認其耐久性，將受損混凝土試體貼覆兩種不同之碳纖維貼片，放置於紫外線環境與烘箱＋人工海水循環加速環境測試後，進行抗壓試驗、抗彎試驗、黏結強度試驗與表面硬度值檢測，利用上述測試環境與試驗結果來評估不同碳纖維貼片補強之效能及碳纖維補強受損混凝土構件之耐久性。 由試驗結果得知，碳纖維貼片可有效地補強受損混凝土試體，貼覆碳纖維貼片能增加抗壓與抗彎強度及延展性。經環境測試後，補強後之受損混凝土試體其抗壓與抗彎強度都沒有大幅度的減少，兩種測試環境皆未造成碳纖維補強系統與混凝土之膠結界面破壞。半U型包覆＋化學錨栓補強後試體之抗彎強度明顯高於僅在受拉面補強試體之抗彎強度。 |
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| 摘要(英)： | ||
| Retrofit and repair of RC structures has been an important issue in civil engineering nowadays. The utilization of advanced composite materials shows great potential in the area of structural rehabilitation. The implementation of structural strengthening with CFRP sheets is a new trend in the world. Extensive researches have been carried out on using CFRP composites for repair and strengthening; however, information about their durability is still lacking. The long-term durability of CFRP composites is a decisive factor in successful application as repair materials or as reinforcement for concrete. In this study, CFRP is used to investigate the durability on strengthening damaged concrete members. In order to assure the effect of strengthening materials, damaged specimens wrapped with two different kinds of CFRP sheets which were subjected to two different environments including ultraviolet (UV) and wet/dry cycling were tested on compressive strength, flexural strength, bond strength and surface hardness tests. Finally evaluate the effect of different CFRP sheets and the durability of damaged concrete wrapped with CFRP sheets using above environment conditions and test results. From the testing results, both CFRP sheets are effective in retrofit on damaged concrete members. Specimens wrapped CFRP sheets can improve compressive strength, flexural strength and ductility. Both environment tests didn’t cause obvious degradation to the compressive and flexural strength. The flexural specimens used half-U coating and anchorage systems were much higher strength than those only pasted CFRP sheets on the flat surface. |
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| 檔案： | 沒有相關檔案 | |
| 相關連結： | http://ethesys.lib.cyut.edu.tw/ETD-db/ETD-search-c/view_etd?URN=etd-0811103-085724 | |