Author(s): Riku Kubota; Jin Kashiwada; Yoshiaki Hisada; Ayaka Katano; Mamoru Tanaka; Nihei Yasuo
Linked Author(s): Mamoru Tanaka, Jin Kashiwada, Yasuo Nihei
Keywords: Building fragility curve Building damage Flooding Kuma River
Abstract: In this study, we analyzed the building damage and flooding situation that occurred in the Kuma River basin due to the July 2020 heavy rain and developed a flooding-related building fragility curve. Flood-related building loss can lead to significant economic losses and social impacts. While advancements have been made in seismic, wind-resistant, and fire-resistant technologies in the field of construction, water-resistant technologies have lagged, and methods for evaluating the relationship between flooding and building damage are not sufficiently established. This research combined actual measured data from the 2020 Kuma River flood with results from river and flooding flow simulations to conduct a detailed analysis of the relationship between flooding conditions and building damage. As a result, we constructed a fragility curve that employs inundation depth, flow velocity, fluid forces, and unit flow rate as flood indicators, clearly illustrating the relationship between building damage and these flood indicators.
Year: 2025