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碩士論文公告區 |
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| 年度： | 92 | |
| 姓名： | 陳鴻智(Hung-Chih Chen) | |
| 論文題目(中)： | 鋼筋混凝土樑損傷檢測之初步研究 | |
| 論文題目(英)： | A Preliminary Study on The Damage Assessment of Reinforced Concrete Beams | |
| 摘要(中)： | ||
| 一般而言，鋼筋混凝土構件檢測可分為兩大類：(一)為結構物系統行為整體之評估；(二)為結構桿件小區域之瑕疵檢測。本研究欲探討由傳統結構系統整體動力反應之資訊中檢測出瑕疵之區域的可行性。首先，藉由推導出簡支樑於中跨之轉換函數比例振幅與桿件勁度間相互之關係，其次利用頻域連續解程式(1DC.FOR)進行各種缺陷之參數研究，進而歸納出經由振態之反應特性判斷出缺陷位置之規則性，並以實體實驗進行驗証其可行性。 實際鋼筋混凝土樑試體之動態反應可利用線桿有限元素程式加上垂直彈簧考量後加以模擬。可合理模擬得到之撓曲動態行為包括；加速度規轉換函數圖形、振態形狀、及時間域之各點位反應等。初步研究結果顯示以轉換函數比例振幅法分析缺陷樑之反應時，訊號對於模擬反應相當靈敏故可有效顯示出缺陷樑之差異性，但由於比例振幅受多項控制參數影響，明確之判讀規則，仍無法扼要歸納出。因此，運用轉換函數比例振幅判斷缺陷之位置之構想，需更深入針對訊號處理方式加以研究。 |
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| 摘要(英)： | ||
| In General , the assessment of RC member can be separated into two categories ;(1) evaluation of the overall structural behavior , and (2)detection of local defects on structural member. It is intended, in this research, to study the feasibility of using overall structural responses to recover local defect characteristics for a specific member. First of all, the theoretical formulation of ratio between two transfer functions associated with both intact and damaged beam was derived for a simply support at its impact at its mid-span. A finite element program was then used to conduct a series of parametric studies. Based on the numerical studies, the rules in determining defect locations can be summarized and were finally verified by experimental data. The preliminary results indicate that the defined ratio of transfer functions can potentially serve as an exaggerated indication for the degree of changes in certain modal responses. Thus, the proposed ratio of transfer function can be used to assist system identification, while the high sensitivity also restrict its current application in field tests unless that results are highly reliable and repeatable. |
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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-0826104-090055 | |