Abstract
The steel bent frame structure of single-story factory buildings is actually a spatial structure system. Different bent frame columns are connected with the roof of bent frame structure, making the columns work and bearing the load together. In the steel frame of the factory building with bridge cranes below 20 t, variable-section columns with corbels are used to bear the crane load. In this article, the steel bent frame column of single-story factory buildings was taken as the research object. The bent frame column was simplified as a cantilever variable stepped column bearing a transverse concentrated force at the top. After simplifying the model, the theoretical formula of deflection, rotating angle, and bending moment of the compression rod was put forward. Moreover, bending deformation and stability of variable stepped columns were analyzed in order to obtain the theoretical and practical formula, then the ANSYS software was used to simulate the bent column.
Highlights
Due to the high standardization and short construction period, the steel bent frame structure of single-story factory buildings is widely used in our daily life
Through the ANSYS modeling software (Ansys 18.2, Mechanical APDL Product Launcher 18.2, USA), the force of the steel bent frame column is simulated in this paper
The top of the column is subjected to the weight of the roof structure, the roof live variable axial forces
Summary
Due to the high standardization and short construction period, the steel bent frame structure of single-story factory buildings is widely used in our daily life. In terms of the force on the steel bent frame column, Ma [2] elaborated the plane bent frame through the design of single-story factory buildings and determined the calculation procedures of the schematic load, the internal force analysis of the column section, and the internal force combination, but the theoretical formula of model simplification was not given. A series of theoretical formulas for model simplification and the shape function of the bent column of factory buildings were obtained through the bending deformation of the second-order cantilever variable order column. The bending deformation and stability analysis of the second-order cantilever variable stepped column bearing transverse concentrated force at the top were conducted. It is expected to provide a theoretical basis for the nonlinear stability calculation of the steel bent column of second-order factory buildings under the joint action of transverse and longitudinal loads
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