In this study, regarding the culvert damage caused by liquefaction during an earthquake, the degree of deformation that affects road function was clarified from the investigation and analysis of the damage cases. In the reproduction analysis of culvert displacement by a practical static analysis method, it was difficult to estimate the displacement that affects the road function because of a lack of dynamic influence. Furthermore, in order to clarify the effects of differences in ground and structural conditions displacement counting on seismic motion, model experiments were conducted resulting in confirming influence of liquefied layer thickness and shapes of culvert to display without.
