RESEARCH ON LATERAL RESISTANCE OF HIGH-STRENGTH COLDFORMED ULTRA-THIN-WALL STEEL WALL FRAMES IN LOW-RISE RESIDENTIAL STRUCTURES
The lateral resistance of a new type of high-strength cold-formed ultra-thin-wall steel stud wall frames in low-rise residential buildings was analyzed mainly by the finite element method in this paper. In FE modeling of the full-scale wall frames, each C section, thin-wall member is modeled by plastic beam elements, joint couplings at the member connections are applied to the simulation of real half-rigid connections. The nonlinear analysis of the wall frame models under the static incremental lateral shear loads combined with constant gravity loads are performed considering material nonlinearity and geometric large deformation simultaneously. As a result, the shear capacity and failure mode of the wall frames are analyzed. Furthermore, a parametric analysis using FE models is carded out. The influences of different stud spacing, height of wall frames and screw spacing at the connections upon the shear capacity and ductility of wall frames are discussed. The results indicate that the local torsion and compressive buckling of members is the main failure mode of this type of wall frame; with the increase of stud spacing, stud height and screw spacing, the shear capacity of wall frame is significantly decreased; the K-type brace system plays a key role in preventing the early out-of-plane buckling failure of wall frame.
Ultra-thin-wall steel Cold-formed steel Wall frame Shear capacity Nonlinear finite element
Qian Gu Wen-Ke Bao Xian-Quan Wang Guang-Yue Ma
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, P.R. China
国际会议
第十届国际结构工程青年学者研讨会(The Tenth International Symposium on Structural Engineering for Young Experts)
长沙
英文
400-405
2008-10-19（万方平台首次上网日期，不代表论文的发表时间）