GBJ11—89抗震规范对于砖混结构的设计思想是:小震不坏,设防烈度可修,大震不倒。而对于大震的设防,主要是构造措施的设防。在华北地区,八度抗震设防区的砖混结构住宅多采用预制板作为楼板,若楼板处理不好,地震发生时就可能使楼板脱落,造成人员伤亡。 The GBJ11-89 seismic code design concept for the brick-concrete structure is that the small earthquake is not bad, the fortification intensity is repairable, and the large earthquake does not fall. For the fortification of large earthquakes, it is mainly the fortification of structural measures. In North China, prefabricated slabs are often used as floor slabs in masonry-concrete buildings in the quake-proof fortification zone. If the floor slabs are not properly handled, the slabs may fall off when the earthquake occurs, causing casualties.