Steel frame structure is widely used in the field of Civil Engineering. The steel structure is of light quality, good seismic performance and good structure ductility. In addition, the steel structure is convenient for large-scale industrial production. However, the steel material is due to the production process and the construction error, etc. Initial defects are inevitable. In this paper, the first four order buckling modes of the whole structure are introduced as initial defects by using the uniform defect mode method. The numerical simulation is carried out by the finite element software ABAQUS. Three analysis conditions are compared and analyzed. The impact factor of the initial defect is compared as a variable. The results of pushover analysis show that: the effect of initial defects on the bearing capacity of the overall structure is almost negligible when the impact factor of the initial defect is small.When the influence factors of the first four order initial defects are 0.5, 0.3, 0.1 and 0.5, respectively, the yield bearing capacity is reduced by 12.5%, the ultimate bearing capacity is reduced by 8.5%.

Li Xiaofei. Analysis of Bearing Capacity of Steel Frame Structure Considering Initial Defects. International Journal of New Developments in Engineering and Society (2018) Vol. 2: 7-9.

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