2016年熊本地震の益城町における被害建物の解体率と構造内訳

抄録

After a large-scale disaster occurs, severely damaged buildings are demolished and treated as disaster waste. To obtain basic data for estimating the amount of disaster waste, we analyzed the demolition ratio from the building database in Mashiki Town after the 2016 Kumamoto Earthquake. The building database includes damage level, structure typology, building year, etc. We also analyzed the relationship of demolition ratio with building typologies and construction year. The demolition ratio for severely damaged, moderately damaged, and minor damaged buildings were calculated as approximately 85%, 30%, and 10%, respectively. The proportions of wooden and other structures on demolished buildings were also derived as approximately 90% and 10%. The demolition ratios of newer buildings in the same damage levels were less than buildings constructed before 2000.