Mechanical Performance And Construction Control Of Fabricated Steel Frame With Inclined Support

Due to the time-varying characteristics of prefabricated components during the construction of assembled steel structures,components have become a high-risk source in the construction process.The safety and stability of the fabricated steel frame structure under construction state can be realized by analyzing the mechanical performance and construction control of the fabricated steel frame structure with oblique braces.Based on the finite element method,this paper discusses the mechanical properties modeling,analysis and calculation of steel frame structures with oblique braces.The stability and load transfer triangle of steel frame structure are analyzed.According to the development characteristics of plastic zone of member,the internal force redistribution effect of structure is analyzed and discussed.Aiming at the construction project of a high-rise steel frame structure in China,the safety and stability of the construction stage are analyzed under three different construction organization designs.Through the research and analysis,it is necessary to compensate the deflection of steel frame structure assembly when choosing the construction scheme of installing oblique braces in batches,taking into account the influence caused by the vertical compression deformation of components.The dynamic performance of steel frame structure shows that the inclined brace improves the basic frequency value of the structure,and make the energy dissipation by the resistance of the structure.Seismic performance has been improved with a certain extent;the stability of columns under axial compression has been advanced by increasing the connection between columns and truss-beam.During the construction,it is necessary to pay attention to the sudden change of stiffness between adjacent frame stories caused by improper assembly sequence of members,so as to avoid the structure.The stress state changes abruptly.