VIBRATION TESTING FOR NONDESTRUCTIVE EVALUATION OF BRIDGES. I: THEORY

This paper presents several methods that are candidates for objective and effective examination of bridge signatures that are based on techniques of digital signal processing and pattern recognition. It is noted that a 'smoother' may be used to preprocess signatures. In this study, synthetic noise is added to signatures to examine the robustness of a technique, and the method of minimum crack sensitivity measure is introduced to evaluate the effectiveness of different interrogation procedures. In this, the first of a 2-part paper, the theoretical bases of the methods are presented.

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