砖混结构房屋由纵横墙承重,抗震性能较弱。新旧建筑的结合方式是改扩建工程的关键环节。以某学校公寓楼扩建项目为例,研究分析砖混结构改扩建设计特点,对公寓楼抗震鉴定并进行整体加固,提出了新旧建筑的结合方法,确保了整个建筑结构安全。 Brick and concrete structure by the vertical and horizontal wall load-bearing, seismic performance is weak. The combination of old and new buildings is the key to renovation and expansion project. Taking a school apartment building expansion project as an example, this paper analyzes and analyzes the design features of the brick - concrete structure expansion and reinforcement, aseismic identification of the apartment building and the overall reinforcement, puts forward a combination of old and new buildings to ensure the safety of the entire building structure.