| In 2016 Kumamoto Earthquake occurred in Japan, many road bridges were severely damaged under the earthquake ground motion and the ground deformation. Many bridges lost the function. It is presumed that the damage was severe because these combined action due to this earthquake exceeded the design assumption, so future seismic design has to presume the possibility of the action different from the design force.To prevent the failure of the bridge function due to the action exceeding the assumption, it is important to verify the mechanism of the bridge and to reflect in the design standard based on knowledge obtained from the investigated data.This study aim to clarify the behavior of the bridge during the earthquake. Firstly, the force acting to the bearing supports was estimated by the damage trace, and the failure mechanism of the bearing support was estimated. Secondly, the behavior of the bridge was verified based on the post-earthquake investigated data of bridge and the results of the test of the bearing supports. |
