历史文化街区保护性开发过程中的防火间距问题

为了解决历史文化街区保护性开发建设过程中建筑新建或修缮改造所面临的防火间距设置要求问题,选择某历史文化街区内3类典型建筑形式,利用FDS对防火间距分别为2.0、2.5、4.0、6.0 m条件下相邻建筑外墙所受的最大热辐射强度进行模拟计算.结果表明,间距为4.0 m时,辐射热流密度可达到或接近易燃家具的引燃辐射热流密度值...

Fire separation problems in the process of protective exploitation of historical and cultural blocks

To solve the problems of the fire separation distance between new buildings, retrofit buildings and existing buildings in historical and cultural blocks, 3 typical building was selected to simulate the highest heat radiation intensity of adjacent building by FDS. The fire separation distance was 2.0,2.5,4.0,6.0 m. The results showed that when the spacing is 4.0 m, the radiant heat flux can reach or close to the ignite radiant heat flux of flammable furniture. When the spacing is 6.0 m, the radiant heat flux is lower than the ignite radiant heat flux of flammable furniture. On this basis, combined with the analysis of relevant code provisions and the requirements of the practical project, different technical measures such as no opening and staggered opening on the outer wall, setting fire doors and windows and / or setting sprinkler system are considered respectively, and correspondingly the fire separation requirements between new buildings, new buildings and reconstructed buildings, and existing buildings in historical and cultural blocks are suggested.