| 姓名 | 周亞儀(Ya-Yi Chou) | 電子郵件信箱 | E-mail 資料不公開 | |
| 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 | 94學年第2學期 | |
| 論文名稱(中) | 以應力波法評估混凝土表面老劣化程度之初步研究 | |||
| 論文名稱(英) | Preliminary Study on Evaluation of the Surface Damaging Degree of Aged Concrete by Stress Wave Method | |||
| 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/98 | |||
| 摘要(中) | 混凝土之表面由於風化、中性化與乾濕循環等效應容易產生微細裂縫造成表面劣化的問題，本研究由敲擊回音法檢測時所得到之反應頻譜，來評估混凝土表層劣化程度。發展這種非破壞的檢測方法，對於不適合破壞之結構物評估則更顯有實務上的需求及價值，且可以提供現場評估表面老劣化程度的準則。 本研究是以兩方向加以討論，ㄧ為由數值模擬混凝土版劣化後其劣化參數反應頻譜各振幅尖峰頻率值之關係。另一為探討實際量測混凝土版劣化後其反應頻譜各振幅尖峰頻率值之關係，並與數值模擬分析之結果相互驗證，模擬劣化狀況主要是以P波波速、混凝土上層厚度與裂縫間距作為變數，進而探討對振幅頻率的影響。 由研究結果顯示，混凝土版在不同的劣化狀況下在適當儀器配置下，反應頻譜之振幅尖峰頻率值會隨之改變，其主要影響振幅尖峰頻率值改變的因素為混凝土上層P波波速與劣化深度，而裂縫間距對頻率的影響較小。故以本研究之應力波法可以藉由反應頻譜之振幅尖峰頻率值預測混凝土表面劣化狀況與劣化深度。 | |||
| 摘要(英) | Because of the
effect of weathering, neutrality as well as dry wet cycling, very small
cracks on surface of concrete can easily be produced and cause surface
deterioration. This study uses the impact-echo method to assess the
degree of deterioration on surface of concrete. This kind of
non-destructive method, can more practicaly assess the structure which
is not suitable to be tested distructively, and can offer the criterion
of assessing the degradation degree in situ. The purpose of this study is as following：(a)Using the numerical simulation to establish the relation of the peak frequency in amplitude spectrum and the parameters indicating the degree of deterioration. (b)Use the experimental method to examinate the proposed relation obtained from the numerical simulation. The state of simulated degradation is mainly expressed by the parameters such as speed of P wave, the thickness of upper layer of concrete and interval of cracks. Shown by the result of study, the change in spectral peak frequency is affected by the different degrading states of concrete plate. The main factors affect the peak frequency are concrete upper layer P-wave speed and depth of degradation. The interval of crack has a little effect on frequency. Therefore the concrete surface degrading state and depth of degradation can be predicted by the spectral amplitude peak frequency . | |||
| 關鍵字(中) |
|
關鍵字(英) |
| |
| 指導教授 |
| |||