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《Journal of Vibration and Shock》 2018-12
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A damage evaluation method for simply-supported bridges based on wavelet transform correlation

YAN Yuzhi;ZHAN Jiawang;ZHANG Nan;XIA He;LI Ming;HU Suoting;School of Civil Engineering,Beijing Jiaotong University;State Key Laboratory of High Speed Railway Track Technology;  
A sub-step method based on the FE model updating technique was proposed for the damage evaluation of simply-supported bridges. In the method,the wavelet transform correlation of the bridge displacement response under moving loads were taken as the objective function,and it reduced the parameters to be identified. A numerical example of a simply-supported steel beam model indicates that the proposed method can quantitatively identify the damage of different positions and degrees with only one displacement measuring point. The load velocity,load value and the location of measuring points have little influence on the quantitative identification of the damage,and the method has strong anti-noise ability. The damage boundary approach method can be used to approach the true damage locations and identify the damage extents precisely.
【Fund】: 中央高校基本科研业务费专项资金资助项目(2016YJS111);; 国家自然科学基金项目(51678032;51720105005);; 中国铁路总公司科技研究开发计划项目(2017G002-B);; 国家创新平台开放基金(2016YJ002)
【CateGory Index】: U446
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