摘要
Abstract
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 dam-age of the middle column is more serious than that of the side column.At the same proportional distance,the higher the tempera-ture is,the more serious the overall damage of the frame is.When the temperature is the same,the smaller the proportional dis-tance is,the more serious the frame damage is.The research results can provide theoretical reference for fire and explosion resis-tance research and engineering reinforcement of steel frame structures in the future.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Key words
fire and explosion/steel frame structure/failure analysis/proportional distance/finite element model分类
建筑与水利
