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1976年唐山地震造成装配式单层工业厂房严重破坏和倒塌的一个重要原因,是由于屋盖体系整体性差,在强烈地震下屋面板与屋架之间焊缝拉开,屋面板发生错动、散落,致使结构丧失整体稳定而造成震害。因而,保证厂房屋面结构整体性,并使结构和连接部分具有足够的强度和较好的延性,是一项有效的抗震措施。装配整体式预应力混凝土屋面板就是一种较为理想的结构形式,板端伸出预留筋,屋架上弦预埋锚筋,用现场二次浇灌混凝土
One of the important reasons for the severe damage and collapse of the assembly-type single-story industrial building caused by the Tangshan earthquake in 1976 was due to the poor integrity of the roof system. In the event of a strong earthquake, the weld between the roof plate and the truss was pulled apart, and the roof plate was dislocated and scattered. , resulting in the loss of the overall stability of the structure caused by earthquake damage. Therefore, it is an effective anti-seismic measure to ensure the integrity of the factory’s building surface structure, and to make the structure and connection part have sufficient strength and good ductility. The prefabricated monolithic prefabricated concrete roof slab is an ideal structural form. The plate ends extend from the reserved ribs. The roof truss is anchored on the top chord and the site is used for secondary concrete pouring.