Robustness modeling analysis of multi-story steel frame structures against continuous collapse risk
At present,the conventional robustness analysis method for steel frame structure collapse risk mainly a-dopts a modular approach for structural modeling,which leads to poor modeling and analysis results due to the neg-lect of key node parameters of the supporting layer in the simplified modeling of the model.In this regard,the ro-bustness modeling and analysis method of multi-story steel frame structure against continuous collapse risk is pro-posed.Taking the nodes of the bracing plane as the simplified objects,the mechanical parameters of the simplified steel frame structure model are calculated to obtain the axial force at the bracing plane of the model.Then the finite element modeling is carried out for the support plane and the steel column structure respectively,and the length of the steel structure column is optimized.Finally,for the constructed finite element model of the steel structure,the ultimate structural function under the collapse state is constructed,and the ultimate bearing capacity is solved to re-alize the robustness analysis of the collapse risk of the steel frame structure.In the experiments,the analytical per-formance of the proposed robustness analysis method is examined.The experimental results show that when the proposed method is used for the robustness analysis of steel frame structures,the simulated collapse stress curves are closer to the actual situation,and the robustness modeling and analysis performance is more ideal.
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