TY - CONF
T1 - A suitable risk index for evaluating bridge damage in the Misasa River caused by the 2018 Western Japan floods
AU - Inoue, Takashi
AU - Yamamura, Yuka
AU - Nihei, Yasuo
N1 - Funding Information:
The cross-sectional data for the Misasa River used in this study was provided by the Oota River Office, the Chugoku Regional Development Bureau of the Ministry of Land, Infrastructure, Transport, and Tourism, and the Civil Engineering Bureau of Hiroshima Prefecture. We wish to express our appreciation to Professors Y. Kawahara and T. Uchida, Hiroshima University, Professor S. Yano, Kyushu University, and Professor G. Watanabe, Yamaguchi University. This study was supported by the River Fund of the River Foundation.
Publisher Copyright:
© 2020 22nd Congress of the International Association for Hydro-Environment Engineering and Research-Asia Pacific Division, IAHR-APD 2020: "Creating Resilience to Water-Related Challenges". All rights reserved.
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
KW - 2018 Western Japan Floods
KW - Bridge damage
KW - Floods
KW - Local scour
KW - Risk assessment
UR - http://www.scopus.com/inward/record.url?scp=85104720758&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:85104720758
T2 - 22nd Congress of the International Association for Hydro-Environment Engineering and Research-Asia Pacific Division: Creating Resilience to Water-Related Challenges, IAHR-APD 2020
Y2 - 14 September 2020 through 17 September 2020
ER -