The steel structure frame of the hydrogen metallurgical shaft furnace has the characteristics of multiple floors,large platform load,high aspect ratio,and many surrounding auxiliary structures.However,due to the limitations of process layout requirements,its mass and stiffness distribution are uneven.In order to study the seismic performance of the shaft furnace steel frame under rare earthquake actions,the Pushover method was used to conduct static elastic-plastic analysis based on MIDAS GEN structural analysis software.The focus was on analyzing the development of plastic hinges,capacity curves and performance points,interlayer displacement angles,etc.of the structure under different lateral force loading modes.The research results indicate that under rare earthquakes,plastic hinges mainly appear at both ends of supports and frame beams,and the structure meets the seismic design requirements of"strong columns and weak beams".Under both lateral force loading modes,the performance points of the structure can be found,which meets the seismic fortification goal of"not collapsing during large earthquakes".The interlayer displacement angle meets the specification limitations and points out that attention should be paid to the design of weak layer parts.
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