Statistical evaluation of the responses of a passing vehicle over a bridge to assess the damage state of the bridge

Abstract

This paper reports on the assessment of a bridge state based on the responses of a passing vehicle. Herein to recognize the difference between intact state and damage state, occurrence histogram of dominant frequencies obtained by AR method is focused on. As a damage state, rotational support is fixed and also distributed mass is added on the model beam. Measurement tests are repeated 300 times to obtain enough data set to assess the statistical characteristics of the responses of a passing vehicle. Finally, it is found that deviation and mean values of data set of dominant frequencies of damage states are different from those of intact state with a certain confidence level.