Semi-rigid Joint Stiffness Of Influence Study On The Structure Properties Of The Steel Frame

As an important load-bearing structural system, Steel frame structure widely used in residential, office,entertainment and other public buildings. With more and more extensive application of high-rise steel frame,semi-rigid connections also applied to some practical engineering, However, the analysis of the theoreticalstudy of the semi-rigid connection structure is still not perfect, semi-rigid joints generally simplified idealrigid connection or ideal hinged. This paper based on the frame beam end-plate bolts connecting nodestiffness test, static analysis and dynamic analysis this kind of steel frame to explore the connection stiffnesson steel frame and earthquake resistance performance, then provide theoretical basis of semi-rigid steelframe designing.Firstly, author test the beam-column weak axis extended end plate connection. Researching this kind ofnode’s failure process under uniaxial loading test and obtaining the node’s moment-rotation curve byexperiment, provide the basis for the actual project and below the numerical simulation.Author designed the Nanjing high-rise residential building, using PKPM software to determine thestructural arrangement and the member section size of the building, then static analysis of the tall steelframe structure with finite element software ANSYS, while establishing four tall steel framework to researchthe properties of the steel frame in different connection stiffness.Secondly, modal analysis to research the structure of the dynamic performance, followed by semi-rigidconnections steel frame and a different connection stiffness tall steel frame to research the connectionstiffness of structural vibration period. The results showed that the semi-rigid connection of the steelframework of a low-level vibration period becomes larger, but the impact of the high-order vibration periodis not obvious and can be ignored.Steel frame with semi-rigid connections response spectrum analysis and research the seismic performanceof the structure, followed by different connection stiffness tall steel framework to research the seismicperformance of connection stiffness. The results showed that the semi-rigid connections effectively reducethe structure of the underlying shear, so that the structure under seismic action tends to be safed.