The Influence Of The Eccentric Support For Steel Frame Structure

With the development of modern society and the need of people’s life, thedevelopment of modern high-rise buildings. And the development of science andtechnology to promote the development of high-rise structures.At the same timebecause the high-rise structure has good performance, ductility of big structure is clear,make the steel system application in the high-rise structure become very common.In this paper, combined with our research results about steel frame structure ofeccentric support, through the use of calculation software PKPM for the pure steelframe structure, Chevron, eccentrically braced steel frame structure, the door frame typeeccentrically braced steel frame structure, V center, eccentrically braced steel framestructure self vibration period were compared and analyzed, the horizontal seismic forceand the deformation of the structure is analyzed, the analysis results show that the:(1) in steel frame structure weak axis (Y axis) direction of additional support, canincrease the overall stiffness of the structure, reduce the effect and decreases, than thecorresponding structure corresponding to the effect of torsion effect is obvious.(2) the total shear band center support and eccentrically braced steel framestructure is greater than the total shear frame structure without the support.(3) the steel frame structure with support, support to bear a considerable part of thehorizontal seismic force, horizontal force support and steel braced frame structure isgreater than that in the horizontal force of earthquake force eccentrically frames bear.(4) under the action of earthquake, the steel frame structure with eccentric supportthan the pure frame structure system Y to the lateral displacement has been significantlyreduced, with frame structure of a chevron brace Y to the maximum floor displacementminimum, with the door frame type eccentrically braced steel frame structure, withpeople eccentric bracing and type V center support ranked second, and eccentricity of Vtype braced steel frame structure in the direction of lateral support set maximum.