Research On The Bracing System For Steel Structure Of Light-weight Buildings With Gabled Frames

Steel structure of light-weight buildings with gabled frames has been using wildly in many civil and Industrial buildings recently. During the design of light-weight steel structure with the characters of lightness, the sections of beams and columns of rigid frames are designed as the high and thin forms by any possibility. Stability is the very important terms of this kind of beam-columns. That the pressed wings can't hold the stable status out the plan is the primary questions of stability. Properly braces should be used to prevent this case in designs. The longitudinal stiffness of rigid frames is supported by the horizontally transverse braces on roofs and braces between columns. It is necessary to analyze exactly this kind of bracing system.In this paper, based on the essential theory, the connection of columns between braces and beams between braces are derived. Based on these results, the analyses method of connections of beam-columns between braces is presented tentatively. The formulation for bracing stiffness and out-plane critical capacity is put forward. In the analyses of the horizontally transverse braces on roofs and braces between columns, a new calculation pattern named simulative plane truss is presented. And it turned out that the method in this paper can be used to pay the bracing systems of light steel structures preferably.