火災統計資料に基づく延焼火災の特性:　全国の延焼火災の傾向及び政令指定都市と東京23区の延焼火災件数と焼損床面積の分析

摘要

本稿は，火災統計資料に基づき，延焼火災について火災件数と焼損床面積を指標に分析を行った．以下に分析により得られた結果を記述する．まず，全国の火災については以下の通りである．1. 出火月に関して，全ての建物火災の火災件数と延焼火災のみの火災件数には強い相関がある．%About 60,000 fires occur per year in Japan. Of them, over 30,000 cases were building fires. And burnout floor area is about 1,500,000 m~2 per year. It is preferable to decrease the number and scale of fires. The purpose of this study is to analyze the behavior of fire and its spread. To analyze them, we used fire statistics which is available to the public. At the beginning, the object region was the whole of Japan. The second object is Government-decreed cities and Tokyo's 23 wards. We analyzed the rate which is the fire spread and non-fire spread. Next the research was the correlation between the burnout floor area of the fire origin building and the burnout floor area of buildings damaged by fire spread. The result shows that the Fire spreading is not a special thing as the side of the month. The burnout floor area increases as the number of burnt buildings increases. It is different from each region that the calculation guidelines about burnout floor area. There is poor correlation between the burnout floor area of the origin building and the burnout floor area of damaged buildings.