橋梁沖刷監測預警系統建置之試驗研究

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橋梁沖刷監測預警系統建置之試驗研究

Experimental Study On Bridge Scour Early Warning System

林其穎 , Masters　　Advisor：張國鎮　　

繁體中文

沖刷監測；橋梁結構安全性；縮尺模型沖刷試驗；倒塌預警； Scour monitoring ； Bridge stability ； Bridge scour experiment ； Safety early warning

Abstract │ Reference (39) │ Times Cited (5) │ Altmetrics

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Taiwan is the island which is well known for its distinctive topography features. The central mountain range bisects the land from north to south resulting in most rivers have short courses and rapid streams. As a result, the scour effect could be seem as a critical problem for the bridge structure as the scale of natural disasters increase. The growing amount of bridge failure events in Taiwan due to typhoons and floods in recent years causing the public pay more and more attention towards the bridge safety under natural disaster, and the government and related organization also put a lot of efforts on such problem. This dissertation applies five kinds of sensing units which is based on the same sensing mechanism of developed scour monitoring system to laboratory experiments. Sensing units includes micro-electro-mechanical systems based pressure sensors, vibration-based detection sensors, floating ball, inner camera and handheld camera. The main purpose of this research is to verify the feasibility of developed monitoring system and to establish a warning benchmark by conducting the various test using reduced scale bridge structure model in laboratory.
	The feasibility of the developed monitoring system has been verified in laboratory by several experiments. The scour depth measurement by using accelerometers and the floating ball have been successfully applied to experiments, and it could be observed and confirmed that the scour depth can be regarded as the major parameter for the safety evaluation of caisson foundation bridge. Modes of scour failure for bridge structure are complex with many uncertainties, but the proposed sensing mechanisms for scour early warning could be achieved.

Reference ( 39 ) 〈TOP〉

2. 財團法人台灣營建研究院。高速公路橋梁延壽評估及案例分析委託研究計畫。民國九十三年。
連結：
4. 財團法人台灣營建研究院。鐵路橋梁過河沖刷段橋墩與基礎結構系統檢測技術之研究。民國九十七年。
連結：
8. 林高玄。基礎裸露橋梁之耐洪能力評估。國立台灣大學碩士論文。民國九十三年。
連結：
9. 顏宏宇。河川橋梁下部結構之整體耐洪能力評估。國立台灣大學碩士論文。民國九十四年。
連結：
18. Lin, Y.B., Chen, C.C., Chang, K.C., Chern, J.C. and Lai, J.S., “Real-time monitoring of local scour by using fiber bragg grating sensors”, Smart Materials and Structures, Vol. 14, pp. 664-670, 2005.
連結：

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