ABSTRACT
The number of aging bridges that have been constructed more than 50 years is increasing in Japan. It is necessary to establish an efficient and quantitative bridge inspection method. From this background, we proposed an efficient deck health evaluation method using an impact vibration test with a portable FWD (Falling Weight Deflectmeter). The objective of this study is to improve the accuracy of damage detection of slabs by FWD testing with field test and FE analysis. In the field FWD test, we got response acceleration data from several points on deck before and after the slab replacement. By comparing them, we found that the correlation coefficient of response acceleration between the measurement points was related to the soundness of the slab. We also estimated the damage area of the deck by correlating the difference in response acceleration between the measurement points. From the 3D FE (Finite Element) analysis modeling the target bridge, the effect of partial deterioration of the deck slab on the vibration response from field test was simulated.
