This report develops an algorithm for the detection of cracks on bridge structures, based on the Wavelet Transform (WT). A review of the state of the art techniques for crack detection of beams and bridges is made, and studies for the effectiveness of Finite Element Modeling and WT characteristics, such as wavelet type and noise effects, are performed. The results are used for the development of a robust approach to detecting damage in bridge structures, introducing the concept of multiple-support-bridge crack detection. Both direct use of mode shapes and of moving load approaches to detection are made, commenting on the advantages and drawbacks of each. An overall assessment of the state of the art of WT damage detection is given in the concluding paragraphs.
Worcester Polytechnic Institute
Major Qualifying Project
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