Structural Analysis Of Post-earthquake Fire Considering Fire Door Damage Based On BIM Technology

For the past few years,the property of post-earthquake fire structures has become a hot topic of research domestic and overseas.But,it is found from the existing studies that the researchers based their own assumptions on the location and temperature distribution of the fire,especially the number,distribution and fire partition of the combustible which is associated with the fire,instead of the information of the building.In addition,it is difficult to obtain the true distribution of fire temperature field after the earthquake by assuming the fire location for fire simulation and not correlating the combustion objects in the building with the fire location,which lack rationality.So this paper mainly discusses a kind of using BIM technology consideri ng the structures damage of post-earthquake fire simulation,a quantitative assessment of post-earthquake fire doors damage to structure the influence of the temperature field distribution,and a cross,its structural earthquake damage model is established by ABAQUS,the fire simulation analysis of temperature field in the seismic damage model and gravity load,then the performance of the frame structure is analyzed.The main research contents are as follows:(1)Summarize a series of research results on the t hermal and mechanical properties of structural steels at high temperatures at home and abroad;(2)Develop a BIM technology-based post-earthquake fire simulation method considering the destruction of non-structural components,and quantitatively evaluate the impact of fire door damage in buildings on the distribution of structural temperature field.Building fire source information model was quickly and accurately established by BIM technology,and its three-dimensional frame finite element model was established by SAP2000.Three selected seismic waves of the same site type were acted on the model,and the index of inter-storey displacement angle was used as the discrimination method of earthquake damage.Moreover,the seismic performance evaluation method of FEMA P-58 was used to evaluate the damage of doors after the earthquake,and then the effects of damage degree of fire doors on building fire temperature distribution were analyzed through Pyrosim simulation,so as to obtain the real temperature field distribution based on the correlation between combustion objects in the building and the location of fire.It also provides the basis for the temperature distribution of the structure after the earthquake to study the overall performance of the structure.(3)Using ABAQUS to build a frame model,considering the door damage or not considering the door damage fire simulation analysis of the temperature field curve of the first,fifth and ninth layer frame column and using ISO834 standard temperature curve in the ABAQUS finite element model for analysis and calculation.The influence of seismic damage of fire door on the structural deformation of subsequent fire is obtained.