| 姓名 | 吳俊鴻(Jiunn-Hong Wu) | 電子郵件信箱 | jhkk0201@yahoo.com.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 | 93學年第2學期 | |
| 論文名稱(中) | 鋼筋混凝土開裂試體及裂縫修補試體製作與測試 | |||
| 論文名稱(英) | Fabrication and Non-Destructive Evaluation of Reinforced Concrete Specimens Containing Delaminated Cracks and Repaired Cracks | |||
| 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/145 | |||
| 摘要(中) | 配合開發核設施混凝土結構體安全評估技術之需求，本計畫的主要目的在製作鋼筋混凝土自然水平開裂縫裂縫於版塊試體。由於製作出不同的開裂裂縫寬度，試體可做為裂縫修補工法之成效評估試塊，並可在修補與未修補之相同破壞狀況之試體進行NDT測試，透過研究比對，建立修補後評估技術之背景資料以及提供土木非破壞檢測判讀實習與技術校正。 本計畫製作四塊1 m�e2.1 m�e0.4 m之混凝土版塊試體，其中兩塊為純混凝土，兩塊內含網格排列鋼筋試體，每個試體計畫製作之裂縫寬度及形式均相同，其中一塊純混凝土及一塊含鋼筋試體提供為未來裂縫修補工法之成效評估試塊，另外兩塊用於本研究。其混凝土強度及鋼筋尺寸配置均模擬圍阻體底版結構，其混凝土水平裂縫為自然開裂，開裂方式是以膨脹水泥注入事先剖開並埋入試體之塑膠管中，膨脹水泥以數小時時間內將混凝土自然開裂，在裂縫裂至預期寬度時再將膨脹水泥抽出。本計畫成功製造出1mm、3mm及5mm之水平大面積裂縫。 含修補及未修補裂縫試體完成後，均進行非破壞檢測評估，檢測方法預計包括敲擊回音檢測、透地雷達檢測及陣列式超音波檢測。其中敲擊回音試驗結果是以最新研發之轉換函數資料處理法來分析，此法與陣列式超音波探測的方法均為評估裂縫修補狀況之創新研究方式。 | |||
| 摘要(英) | For the needs of
developing techniques for the safety assessment of concrete structures
in nuclear facilities, the present project focuses on constructing
concrete specimens containing naturally developed delaminated cracks
with various crack depths. The specimens can be used for evaluating the
repairing techniques which may be applied in the nuclear facilities and
be provided for establishing the database for various non-destructive
testing techniques. Four specimens with dimensions 1 m by 2.1 m by 0.4 m were constructed. Among them, two are unreinforced specimen and the others contain lattice-arranged steel reinforcing bars. One unreinforced and one reinforced plates are provided for future repairing works and the rest of the specimens were used for present study. In the specimen-design, the concrete strength, size and arrangement of steel bars are all simulating those in the base floor of nuclear power plant. The delaminated cracks are at the depth which was typically appeared in the base floor of nuclear power plant. The method for creating cracks is as following. First, inject strong expansive cement paste into the pre-split carefully arranged plastic tubes buried inside the concrete specimens. And then wait for several hours for expansive cement storing enough force to crack the surrounding concrete. After the cracks open to the designed crack width, the expansive cement were extract from the tube and stop the crack growth. As the results, delaminated cracks with width 1mm, 3mm and 5mm were successfully created. The specimens can be provided for various NDT methods including impact-echo, ultrasound, short-pulse radar, and ultrasound matrix. Among them, the responses of impact-echo tests will be transferred into the transfer function for more valuable analyses. The matrix ultrasound evaluation is the cutting edge technology for evaluating the damaged and repaired concrete structures. | |||
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