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研究生:林家群
研究生(外文):Chia-Chun Lin
論文名稱:音射法監測混凝土修補前後之開裂行為研究
論文名稱(外文):The study of cracking behavior of repaired concrete using acoustic emission measurement
指導教授:干裕成干裕成引用關係
指導教授(外文):Yu-Cheng Kan
學位類別:碩士
校院名稱:朝陽科技大學
系所名稱:營建工程系碩士班
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:中文
論文頁數:81
中文關鍵詞:音射法混凝土
外文關鍵詞:ConcreteAcoustic Emission
相關次數:
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本文主要在研究鋼筋混凝土劈裂破壞及握裹破壞之力學行為
與Acoustic Emission 訊號變化的關係, 並與修補後的行為進行比
較。研究中製作長15cm 混凝土立方形試體, 其變數有混凝土強
度、破壞方式、修補前後比較, 試驗方式採用劈裂試驗及拉拔試
驗, 並以位移控制加載至破裂, 之後經環氧樹脂Epoxy 修補後再
加載。另外,本試驗同時使用AE 訊號監測儀,期找出破裂行為及
AE 訊號關係, 並建立相關資料庫。
本研究試驗結果發現, 劈裂和拉拔由於力學行為不同, 呈現
AE 訊號亦明顯不同; 而拉拔接觸面又因為接觸到鋼板或橡膠墊,
導致承載力大小、破壞所需的能量及裂縫開裂方式與行為, 有很
大的差異。大部分的AE 訊號都集中在靠近尖峰載重,試體修補後
訊號會更是如此。由AE 訊號分析發現劈裂破壞屬無預式破壞。另
由拉拔試驗訊號分析觀察,其AE 訊號呈現一個或兩個尖峰值,此
現象係反應其鋼筋混凝土試體之不同條件所產生破壞過程之差異。
This research primarily focuses on studying the splitting
fracture and debonding behavior of concrete correlated their
corresponding Acoustic Emission signals. The concrete after repair
was with also monitored and compared. Specimens of 15cm × 15cm ×
15cm cube have been made with variables in strength, failure type
and with/without repair. Splitting test and pull-out test were
conducted with a displacement control in MTS loadfram. Specimens
were loaded to broken first, then they were repaired and finally
reloaded to fail. An AE monitor system was employed to figure out
its signals correlated with the fracture behavior during the load test.
The test results showed that the AE signals turns out a
distinction between splitting fracture and debonding behaviors. A
rubber pat between the pull-out specimen and load plate makes the
behavior different in its failure mechanics including load capacity,
fracture energy and fracture type. Most AE signal appears mainly
near the peak load, in particular, for those repaired concrete. AE
signals in splitting fracture also turns out a sudden failure type. It
also showed that there are two peak in AE signal for those pull-out
loading test, which reflect different bonding condition between
concrete and rebar.
中文摘要............................................................................................................. Ⅰ
英文摘要.............................................................................................................................. Ⅱ
總 目 錄............................................................................................................. Ⅲ
本文目錄.............................................................................................................IV
表目錄.................................................................................................................VI
圖目錄............................................................................................................... VII
照片目錄........................................................................................................... IIX
第一章緒論.................................................................................................... 1
1-1 研究動機.............................................................................................. 1
1-2 研究目的.............................................................................................. 1
第二章文獻回顧.............................................................................................. 2
2-1 音射技術之發展及應用......................................................................... 2
2-1-1 音射技術的原理.............................................................................. 2
2-1-2 音射技術的特點.............................................................................. 3
2-1-3 音射設備.......................................................................................... 3
2-1-4 影響音射訊號的因素...................................................................... 3
2-1-5 音射法在純混凝土材料上之應用.................................................. 4
2-1-6 音射法在RC 結構上的應用.......................................................... 5
2-2 鋼筋混凝土裂縫之種類......................................................................... 5
2-3 鋼筋混凝土握裹行為............................................................................. 5
2-4 鋼筋混凝土結構物開裂後之受力行為................................................. 6
2-5 修補材料介紹......................................................................................... 7
2-6 修補材料之相容性................................................................................. 8
2-7 混凝土破壞力學................................................................................... 10
2-7-1 破壞力學的發展............................................................................ 10
2-7-2 混凝土線彈性破壞力學................................................................ 12
2-7-3 混凝土非線性破裂理論................................................................ 13
第三章試驗計畫............................................................................................ 24
3-1 試體規劃............................................................................................... 24
3-2 試驗材料............................................................................................... 24
3-3 試驗設備............................................................................................... 25
3-4 試驗步驟及方法................................................................................... 28
3-4-1 配比設計........................................................................................ 28
3-4-2 混凝土基本力學性質試驗............................................................ 28
3-4-3 混凝土劈裂試驗............................................................................. 29
3-4-4 混凝土拉拔試驗............................................................................. 30
3-4-5 混凝土試體修補封邊過程............................................................ 31
第四章試驗結果與討論.............................................................................. 43
4-1 混凝土基本力學性質........................................................................... 43
4-1-1 抗壓強度........................................................................................ 43
4-1-2 彈性模數........................................................................................ 43
4-2 力學行為與AE 監測量化之關係....................................................... 44
4-2-1 混凝土準能量釋放率比較............................................................ 44
4-2-2 AE 訊號分析................................................................................... 45
4-3 ANSYS 分析....................................................................................... 48
4-4 破壞面之觀察..................................................................................... 50
第五章結論與建議...................................................................................... 78
5-1 結論....................................................................................................... 78
5-2 建議....................................................................................................... 79
參考文獻.......................................................................................................... 80
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of concrete,” University of Columbia, pp. 173-179, Aug 1982.
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