INVESTIGATION OF DAMAGE TO HOUSES CAUSED BY TYPHOON JEBI AND THE INFLUENCE OF SURROUNDING ENVIRONMENTS ON ITS OCCURRENCE

Abstract

Typhoon Jebi caused tremendous damages to buildings in Kinki area, Japan. In particular, it has been observed that more than 10,000 houses were damaged in Izumisano City, Osaka Prefecture. Previous study has showed that some houses were damaged by wind borne debris. According to the data in the study, approximately 15% of all surveyed houses were damaged by debris. It indicates that secondary damage because of debris shouldn’t be made light of. Therefore, our study was focused on to identify the features of houses damaged by debris. In addition, the relationships between damaged houses and surrounding environments were investigated. According to our research, the greater number of damaged houses there were in the area to the wind direction of peak gust, the more houses were likely to be damaged by debris. Additionally, it was found that buildings density could affect to the likeness of damage caused by debris. In order to prevent the expansion of typhoon damage, it is important to maintain old buildings that are more likely to be damaged by strong wind or to get construction for wind-resistant reinforcements on those buildings.