| 姓名 | 謝明璋(Ming-Zhang Hsieh) | 電子郵件信箱 | s9311624@mail.cyut.edu.tw | |
| 畢業系所 | 營建工程系碩士班(Department and Graduate Institute of Constrction Engineering) | |||
| 畢業學位 | 碩士(Master) | 畢業時期 | 95學年第1學期 | |
| 論文名稱(中) | Epoxy與PMMA修復混凝土裂縫後之疲勞行為研究 | |||
| 論文名稱(英) |
Fatigue Behavior of Cracked Concrete Repaired by Epoxy and PMMA |
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| 檔案 |
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。 |
論文使用權限 | 校內外完全公開 | |
| 論文語文/頁數 | 中文/68 | |||
| 摘要(中) |
本研究主要檢驗熱硬性裂縫修復材料 -- 環氧樹脂Epoxy及熱塑性 裂縫修復材料 -- 聚甲基丙烯酸系樹脂PMMA對於不同載重強度範圍之混凝土裂縫修補後之疲勞性質，做進一步系統性的檢驗。研究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，作為裂縫修補後效果檢驗之用。檢驗項目主要包含有經疲勞試驗後的承載強度、破裂性質及斷裂時之次數。本研究混凝土之破裂性質包括臨界應力強度因子及破裂能，分別由 Y.S.Jenq和 S.P.Shah 所提出的兩參數法及Hillerborg所提出的破裂能法。其試驗是依據RILEM 50-FMC所建議，適用於評估與計算。由以上的兩個方法去模擬計算經兩種樹脂修補後的混凝土樑之值。 本研究試驗結果發現，在相同返覆加載範圍內，實驗中不管是原樑的疲勞試驗或者是修補後的疲勞試驗，其兩者的離散性不會因為加入修補材料後而比較趨於穩定，所以在疲勞試驗方面若要去取得一個非常穩定的趨勢圖，勢必要有增加試體樣本去佐證，而在疲勞破壞次數方面，以環氧樹脂修補裂縫後之混凝土，其斷裂時之破壞次數遠大於原混凝土；顯示出裂縫修復後混凝土抗疲勞能力，有因Epoxy之介入而明顯改善。另外，對於PMMA樹脂修復裂縫後之混凝土疲勞性質及複合材料力學行為，修復效果則不明顯，與原混凝土較為接近。 |
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| 摘要(英) | The purpose of this study attempts to investigate the fatigue behavior of the concrete crack repair materials-Epoxy a thermoset polymer resin and PMMA, a thermoplastic polymer resin.Three-point bending test on a single-edgeed beams were conducted to examine the performance of concrete after being repaired.The fracture properties including load capacity, fracture toughness and fatigue cyclic numbers were observed. The fracture toughness, in terms of critical stress intensity factor by Jenq and Shah and fracture energy by Hillerburg were evaluated for the concrete before and after fatigue test.The results showed that for a same load range in a fatigue test. The variation of fatigue cyclic number are large for both concrete beam and those after being repaired. More test are repaired to reduce the variation. The beams repaired by epoxy increase significantly the fatigue cyclic number at failure,rather than those original uncracked beams. It reveals that epoxy does improve the fatigue resistance for concrete. However, PMMA-repaired concrete performs similar fatigue resistance as original concrete. | |||
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| 口試日期 | 2006-09-08 | 繳交日期 | 2007-01-08 | |