高强冷弯薄壁型钢墙架结构受剪性能影响因素研究

In this paper, the shear behavior of a new type of high-strength cold-formed ultra-thin-wall steel wall frame is analyzed mainly by the finite element method. In FEM modeling, each thin-wall member is divided by plastic shell elements, the joint couplings at the connection areas are considered for the simulation of real half-rigid connections. The numerical analysis of the wall frame models are performed considering material and geometry nonlinear problems simultaneously. Furthermore, a parametric analysis by FEM is carried out. The influences of different column spaces, different height-width ratios of wall frames and different member connection distances upon the shear capacity of wall frame are discussed. The results indicate that column space, height-width ratio and member connection distances have more evident influences on the shear resistance of wall frame, with the increase of column space, height-width ratio and member connection distance of wall frame, the shear capacity of wall frame is significantly decreased. The proper design of column space, dimensions of a single wall frame and brace scheme could meet the requirement of shear capacity of high-strength ultra-thin-wall steel wall frame.