Analysis of Bridge Vibrations Using Digital Image Correlations and Finite Element Methods

• Main Authors: Yi-Wen Chen, 陳益文
• Other Authors: Chih-Hung Chiang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/48902455937041025717

碩士 === 朝陽科技大學 === 營建工程系碩士班 === 100 === Deteriorated bridges managed by the local authorities often lack sufficient resources for sophisticated long-term maintenance and monitoring programs. There is a great demand of low-cost and efficient monitoring techniques suitable for bridge management. Previous study has indicated that images recorded using consumer digital cameras and processed by digital image correlation methods (DICM) has the potential to fulfill such a need. Current research applies DICM to obtain the displacement data that can be further analyzed using frequency domain decomposition, or FDD. Two bridges with light traffic conditions have been investigated. The measured displacement data are in reasonable agreement with the simulated data using SAP2000. Modal analysis and FDD are also performed using the numerical model for the two bridges. The modal frequencies and damping ratio values are also obtained based on the field experiments but require further verifications with the numerical simulation.