A suitable risk index for evaluating bridge damage in the Misasa River caused by the 2018 Western Japan floods

Takashi Inoue, Yuka Yamamura, Yasuo Nihei

研究成果: Paper査読

抄録

The 2018 Western Heavy Rainfall caused huge floods across a wide area of western Japan on July 5-8, 2018, followed by significant damage to people and their homes. In the Misasa River, which is a branch of the Oota River, Hiroshima prefecture, Japan, 22 out of 94 bridges were damaged by the flooding. The purpose of this study is to examine the characteristics of the bridge failures in the Misasa River. We also propose an index suitable for bridge damage assessment under heavy rainfall based on the longitudinal distribution of bridge damage in the Misasa River. From the results, it is statistically clear that the characteristics of the bridge damage can be related to the non-dimensional cross-sectional area (= cross-sectional area / upstream catchment area) and girder thickness / hydraulic radius. An evaluation procedure for bridge damage risk using these indicators is also examined on a trial basis.

本文言語English
出版ステータスPublished - 2020
イベント22nd Congress of the International Association for Hydro-Environment Engineering and Research-Asia Pacific Division: Creating Resilience to Water-Related Challenges, IAHR-APD 2020 - Sapporo, Virtual, Japan
継続期間: 14 9月 202017 9月 2020

Conference

Conference22nd Congress of the International Association for Hydro-Environment Engineering and Research-Asia Pacific Division: Creating Resilience to Water-Related Challenges, IAHR-APD 2020
国/地域Japan
CitySapporo, Virtual
Period14/09/2017/09/20

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