地震・津波防災

[CS12-67] 3-D tsunami inundation simulation in Shimanokoshi and tsunami response analysis of railway bridges

*津野 靖士¹、佐藤 祐子¹、渡辺 健¹、河路 薫² (1. 公益財団法人鉄道総合技術研究所、2. 伊藤忠テクノソリューションズ(株))

Keywords:Tsunami inundation simulation, Railway bridge, Tsunami response analysis, 2011 off the Pacific coast of Tohoku earthquake, Shimanokoshi

To evaluate tsunami safety of railway structures, we need to understand tsunami force to structures and tsunami response of structures. Therefore, we performed 3-D tsunami inundation simulation including the former Shimanokoshi station which was completely damaged by Tohoku earthquake. Moreover, we performed 3-D elasto-plastic analysis of frames to the railway bridge using the results of tsunami simulation. The distribution of structure response has a similar tendency to the actual damage; however, we could not reproduce the destruction of the railway bridge. Therefore, we need to extract the tsunami pressure from the 3-D tsunami inundation simulation by more detailed modeling.