頁籤選單縮合
題名 | Vibration Tests and Damage Detection of P/C Bridges=預力混凝土橋之振動試驗與損傷偵測 |
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作者姓名(中文) | 唐治平; 呂克明; | 書刊名 | 中國工程學刊 |
卷期 | 14:5 1991.09[民80.09] |
頁次 | 頁531-536 |
分類號 | 441.844 |
關鍵詞 | 振動; 偵測; 損傷; 預力混凝土; 橋; |
語文 | 英文(English) |
中文摘要 | 金岳橋為宜蘭縣金岳村附近之鄉間通道,其簡支預力樑之垂直變位過大,經臺灣 營建研究中心詳細研究分析後,推測其預力鋼鍵之預力值低於設計值,全部三跨度中兩跨度 有問題,其餘一跨度尚稱良好,故此橋樑提供極為難得之機會,作為研究利用振測技術進行 損傷偵測之用。 本文主要目的在(一)以實驗結果證明橋樑動態特性之改變可作為損傷偵測之指標。(二) 研究應用系統識別技巧處理振測資料以計算橋樑損傷量之可能性。研究結果顯示振態之改變 可作為橋樑損傷偵測之有效指標。再者,應用系統識別技巧處理振測資料,可計算出預力橋 樑結構元件之損害傷量。 |
英文摘要 | A three-span countryside bridege with simply supported P/C girders has been found to have excessive deflections in two of the three spans. It is reported that the prestresses in tendons of two girders of different spans are lower than design values. This was determined after performing compression tests of concrete core samples. measuring deflections and performing corresponding analysis. This actual bridge provides valuable specimens for studies of damage detection using vibration test data. The objectives of the present study are (a) to prove experimentally that the changes of dynamic characteristics of a bridge can be used as an indicator for damage detection and (b) to study the possibility of application of system identification in defining damage quantitatively. It is found that the changes of mode shapes can used as an indicator for damage detection. In addition, the use of system identification allows successful quantification of the damaged members in the P/C bridge. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。