STRUCTURAL PERFORMANCE AFTER EARTHQUAKE AND LEVEL OF SERVICE OF TWO-STORY VIADUCT

Abstract

 During the Fukushima Prefecture earthquake that occurred in March 2022, a lot of damage to the middle beams of two-story RC viaduct was confirmed. Therefore, it is important to understand the changes in the structural properties of two-story RC viaduct when the middle beams are damaged. In addition, it is not clear how the damage to the middle beams of two-story RC viaduct affects the train mobility. The fact means that the quantitative relationship between the structural performance and the level of service provided to society is not clear. If such quantitative relationship is provided, the development of new structural technology and its implementation in society will be stimulated. Therefore, this study evaluates the seismic resistance to two-story RC viaduct after damage to the middle beam, and presents a verification process of the relationship between structural performance and level of service in order to quantitatively evaluate the train mobility of two-story RC viaduct after damage to the middle beam.