Analytical study on damage detection method using displacement influence lines of road bridge slab
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Structural health monitoring has garnered attention as a method to quantitatively evaluate damage to road bridges, and various dynamic and static damage detection methods have been proposed recently. However, few damage detection methods focus on the displacement shapes of road bridge decks. In this study, a damage detection approach is proposed using Displacement-Based Index (DBI) and Grey Relational Coefficient (GRC), in which displacement influence lines of deck slabs are used as inputs in the evaluation procedures. Parametric studies were performed by changing the damaged positions and boundary conditions of a full-scale bridge model to examine their possible effects on the performance of the proposed method. The results indicated that either approach could properly detect damage in the simulation model. In addition, because the proposed method was insensitive to damage away from the measurement position, it was clarified that damage detection could be performed accurately by installing multiple displacement meters at appropriate intervals.
KeywordsStructural damage detection Static responses Displacement influence line Damage localization Damage indicator Deck slabs
This study was financially supported by the Grant-in-Aid for Scientific Research Project (Grant number 16K06463). The authors wish to thank the concerned parties for their valuable collaboration, subconsultations, and support.
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