Creation of regional safer in-fill areas through consideration of durability and fire retardation of wood constructions

在东京本乡地区进行了一项关于城市安全填充的财政调查，该地区在第二次世界大战前存在大量陈旧和腐烂的木房屋，尽管其中一些房屋被重建为一室一厅式公寓，这意味着本次调查的实际目的是为了重塑城市火灾发展过程的验证方法。通过实践证明，防火建筑的耐火极限和防火建筑的位置是影响建筑防火性能的重要因素。此外，若能引入生命道路网宽度这一要素，将进一步推动区域填充区降低燃烧蔓延能力评价方法的突破性进展，并阐明大风条件下多栋燃烧建筑物间的共燃形成行为以及利用锥形量热仪对纯木或经火处理的木材的热释放速率的研究。此外，为了减少区域填充区的火灾风险，进行了一些其他的研究，关于高强度混凝土的耐火性桥墩或柱和电力电缆的桥下。其中一个系列研究项目在12月在澳大利亚举行的第五届国际火灾科学与工程研讨会上获得一等奖，2001.通过本课题的研究，作者认为区域性木质填充土防火性能的评价方法将比以往任何时候都先进。

A fiscal investigation on urban safe in-fill was carried out in Hongo district in Tokyo, where there have been existing a great number of old and decayed wood houses before World War II, although some of them were re-constructed into one-room type of flats, which means the actual purpose of this investigation in order to remodel the verification method on urban fire developing process. Through the practice of this investigation, it becomes clear that the fire resistance and location of protective buildings are quite important factors. In addition, if the element of the width of life-road networks be adopted, a break-through to elevate the quality of evaluation method of reducing the ability of flaming and spreading in regional in-fill areas would be promoted further, together with clarifying behaviors of co-flaming formation between several burning buildings under strong windy conditions and heat release rate of pure wood or fire treated wood by using cone calorimeter. Moreover, in order to reduce a fire risk to regional in-fill areas, some other research are carried out concerning fire resistance of high strength concrete for bridge pier or columns and power cables underneath the bridge. One of these series research projects succeeded to get the first prize award at the 5th International Symposium on Fire Science and Engineering held in Australia in Dec., 2001. Through tins research project, the authors believe that an evaluation method on fire resistance in regional woody in-fill areas would be more advanced than ever before.