In this paper, a simple method is proposed for synchronous correction of input / output waveforms recorded asynchronously in structural health monitoring. The main feature of this method is that by identifying the transfer function of the target building from the acceleration record and converting either the input or the output waveform by the transfer function, the accuracy of correlation evaluation (detection of synchronous deviation) between waveforms. As a result of verification using multiple numerical examples assuming two-story housing, by estimating the transfer function using 1 mass system model, it was confirmed that it is possible to estimate the synchronous deviation stably and accurately even if there is noise in the recorded waveform.
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