厚型钢结构防火涂层因其耐火性好、性能稳定而成为最常用的防火保护形式之一,但厚型防火涂层易在地震和冲击等作用下发生破损和脱落,这将影响钢结构的抗火性能。为了认识厚型钢结构防火涂层的破损模式,本文对涂有厚型防火涂料的钢板件进行了纯弯荷载试验,运用有限元分析软件AN SY S对试验全过程进行了模拟分析,并与试验结果相对比。结果表明:受弯构件压区涂层的破损模式主要为涂层-钢板界面破损,拉区涂层的破损模式与涂层厚度有关,当涂层厚度较薄时,主要为涂层内部拉裂,涂层厚度较厚时,主要为涂层-钢板界面破损;涂层厚度越厚,界面破损出现得越早;若在涂层上贴置应变片,会使涂层的界面裂缝和横向裂缝提早出现。 Due to its good fire resistance and stable performance, the thick fire-proof steel structure coating has become one of the most commonly used forms of fire protection. However, the thick fire-resistant coating is apt to break and fall due to earthquake and impact, which will affect the steel structure Fire resistance. In order to know the damage mode of the fireproof coating of thick steel structure, the pure bending load test of the steel plate coated with thick fireproof coating was carried out in this paper. The finite element analysis software AN SYS was used to simulate the whole process of the test, The result is relative. The results show that the damage modes of the nip coating in the flexural members are mainly the interface between the coating and the steel plate is damaged, and the damage mode of the coating in the zone is related to the thickness of the coating. When the thickness of the coating is relatively thin, , The coating thickness is thicker, the main coating - steel interface damage; the coating thickness is thicker, the interface damage appears earlier; if the coating on the strain gauge, the coating will make the interface cracks and transverse cracks Early appearance.