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碩士論文公告區 |
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| 年度： | 91 | |
| 姓名： | 李皇偉(Huang-Wei Lee) | |
| 論文題目(中)： | 混凝土裂縫修補後強度及破裂韌性之研究-環氧樹脂與聚甲基丙烯酸系樹脂 | |
| 論文題目(英)： | Study of Strength and Fracture Toughness of Creaked Concrete Being Repaired by Epoxy and PMMA | |
| 摘要(中)： | ||
| 混凝土結構物常因為不良的環境因素與超額外力的作用下導致各種裂縫的產生，近年來國內地震發生次數頻繁，使得混凝土結構物裂縫修補的問題更顯重要。而關於結構物裂縫寬度之影響與修補材料之選擇上，尚無明確的範例及規範可依循，導致不同修補材料其修補成效無法加以驗證，而在修補材料的破壞力學分析方面，更是難以得到相關理論加以佐證。面對未來的抗震能力上，並無法提供一個較為可靠的保證。 本研究主要是針對環氧樹脂與聚甲基丙烯酸系樹脂兩種修補材料為基材，並探討三種不同裂縫寬度(1㎜、5㎜、㎜)與四種不同比例之含砂量(0、10、20、40％)的修補成效，進而討論裂縫修補完成後破裂韌性之修復成效。 由試驗之結果得知，兩種材料添加不同比例之含砂量時，應力強度因子有隨著含砂量增加而提高之趨勢，而環氧樹脂則有較高之應力強度因子。對於修補混凝土撓曲型裂縫之成效上，其修復強度與修復之破裂韌性皆有隨著含砂量增加而提高。在未添加任何細骨材之情況下，環氧樹脂在強度修復之成效上比聚甲基丙烯酸系樹脂佳。而聚甲基丙烯酸系樹脂材料修補後之混凝土試體樑，能吸收較大之破裂能，具有較佳之耐震效果。 |
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| 摘要(英)： | ||
| Concrete structures frequently exist various types of cracks due to inferior environment and excessive loading. At last few years, the earthquake occurred frequently in Taiwan, so crack repairing of concrete structure is more important. However, there is no specific code to regulate the selections of repairing materials and their applicability to divergent types and widths of cracks and fracture mechanics analyze of repairing materials, neither of the practical means to offer more reliable guarantee. This research is directed against epoxy and PMMA repair materials. The concrete crack was used three width(1㎜、5㎜、10㎜). The sand was used at four different ratios of 0%, 10％, 20％ and 40％ of the volume of the resulting mixes resin, and then evaluate the repaired effect of strength and fracture toughness. From the testing results, two repairing materials add sand with different ratio, the KIC increase with the increasing amount of sand. The result of repaired crack of concrete structure, the strength and fracture toughness increase with the increasing amount of sand. When the sand is 0% in resin, epoxy-repaired have better strength than PMMA-repaired. PMMA-repaired specimens have good toughness and seismic capacity. |
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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-0804103-042445 | |