摘要
考虑围护结构影响下建立2层的钢框架结构,在火灾爆炸分别发生在边跨和中跨2种工况时,通过改变冲击力的大小,分析钢构件的受力和破坏情况,给出钢框架结构的破坏程度。结果发现,钢框架结构具有较大的变形能力,型钢的损伤是随着冲击力的增加逐渐积累,墙的存在加速钢构件的破坏,分析对比梁柱构件的应力时程曲线,发现相同时刻时梁的损伤明显比柱严重,且中柱损伤比边柱更严重,比例距离相同时,温度越高框架整体破坏越严重;温度相同时,比例距离越小框架破坏越严重。研究成果可为今后钢框架结构的抗火抗爆研究及工程加固提供理论参考。
Considering the influence of the enclosure structure,a two-story steel frame structure is established.When the fire and explosion occur in the side span and the middle span respectively,the force and failure of the steel members are analyzed by changing the impact force,and the damage degree of the steel frame structure is given.The results show that the steel frame structure has greater deformation capacity,the damage of section steel accumulates gradually with the increase of impact force,and the existence of wall accelerates the failure of steel members.The stress time history curve of beam-column members is analyzed and compared.It is found that at the same time,the damage of the beam is more serious than that of the column,and the damage of the middle column is more serious than that of the side column.At the same proportional distance,the higher the temperature is,the more serious the overall damage of the frame is.When the temperature is the same,the smaller the proportional distance is,the more serious the frame damage is.The research results can provide theoretical reference for fire and explosion resistance research and engineering reinforcement of steel frame structures in the future.
出处
《科技创新与应用》
2024年第13期73-77,共5页
Technology Innovation and Application
关键词
火灾爆炸作用
钢框架结构
破坏分析
比例距离
有限元模型
fire and explosion
steel frame structure
failure analysis
proportional distance
finite element model
