STUDY ON RISK INDEX FOR BRIDGE FAILURE DUE TO HEAVY RAIN

Abstract

 22 of 94 bridges were damaged in the Misasa River due to the 2018 Western heavy rainfall. The purpose of this study is to propose an index suitable for bridge damage assessment under heavy rainfall based on the longitudinal distribution data of bridge damage in the Misasa River conducted by the authors. As a result, it became statistically clear that the bridge damage characteristics can be explained by using the dimensionless cross-sectional area (= cross-sectional area / catchment area) and bridge index (= bridge area / cross-sectional area) . The evaluation procedure of bridge damage risk using these indicators was also examined on a trial basis.