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碩士論文公告區 |
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| 年度： | 94 | |
| 姓名： | 王啟明(Chi-Ming Wang) | |
| 論文題目(中)： | 敲擊反應於混凝土軸向構件勁度評估之可行性研究 | |
| 論文題目(英)： | Feasibility Study on the Application of Impulse Responses to the Evaluation of Stiffness Property of Axial Members | |
| 摘要(中)： | ||
| 利用一維線桿之軸向振動特性，吾人可由均質桿件之頻率域振動方程式，推求出一簡單靜力勁度估算公式，藉此可用以估算桿件中任兩點間之“擬”靜力勁度值。本研究以一維線桿程式模擬一均質桿件受軸向力量作用下，兩測點之低頻動態反應輸出，例如位移或加速度等。研究結果發現將所模擬之反應訊號用於計算“擬”靜力勁度時，其結果與實際值相當吻合，能準確反應出兩測點間之靜力勁度。 為確認上述方法於實際試體上之可行性，本研究進一步利用水泥砂漿試體進行上述勁度值推估之可行性探討。其結果顯示，在適當之實驗參數控制下，以公式所得之”擬”靜力勁度值確實符合數值驗證中之預測結果。本研究所建議之推估方式，經適當尺度量化後或可作為混凝土構材勁度估算時的有效評估方法。 |
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| 摘要(英)： | ||
| Based on the mechanics of axial vibration of a linear member, a simple formulation for evaluating axial stiffness can be derived and to be used to assess corresponding stiffness for regions within two specific points. In this study, numerical data obtained from one dimensional FEM program was first used to verify the feasibility of such simple formulation in recovering the designate stiffness. It was found that such formulation can be used to serve the purpose. The feasibility of applying such formulation to experimental tests was next verifies with recorded data from realistic concrete specimens. The preliminary results show that the proposed formula may correctly reflect the relative stiffness of different specimens. However, to recover accurate and stable estimates for designated stiffness values, certain treatment on data analysis is needed. It is summarized that such approach can be potentially useful in giving reference values for other effective testing methods. |
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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-0829106-080329 | |