ESTIMATION OF LOST BUILDING STOCK DUE TO THE 2016 KUMAMOTO EARTHQUAKES

Abstract

 In order to restore and redevelop areas affected by natural disasters, understanding of the material inputs needed to restore the community back to a pre-disaster state and a plan for efficient disaster waste disposal are needed. Lost building stocks were estimated for Kumamoto Prefcture, which suffered severe damage by 2016 Kumamoto Earthquakes, by estimating the spatial distribution of building stocks using a micro-building data, overlaying the distribution of seismic intensity, and framing the result in a collapse fragility curve. The result showed that 58% of building stocks in Kumamoto Prefecture were standing on areas that recorded a strong motion of seismic intensity 6-upper, and lost stocks form collapsed or damaged buildings amounted to 260.7 million ton, and it was revealed that half of the stocks were concrete by material.