GEOMETRICAL NONLINEAR ANALYSIS OF SPACE STEEL FRAMES CONSIDERING THE ROTATIONAL PROPERTIES OF MOMENTS DIRECTLY
Based on increment virtual displacement principle and making use of updated Lagrangian formulation, the potential energy associated with all six stress components has been taken into account in order to considering the induced moments generated by rotation of the initial moment about the other axes in the deformation of structures. The cubic polynomial interpolation functions considering the element shearing deformation have been applied to derive the geometrical nonlinear stiffness matrix of the space steel frame beam-column element in detail to consider shearing effects and the rotational characteristic feature of moments. However, the element stiffness matrix derived is valid for a discrete element, so the incremental stiffness equations for whole structures are yielded based on the conditions of compatibility at nodal points of space frames and the symmetry of the stiffness matrix will be restored on the structure level. The accuracy and efficiency of the proposed analytical method are verified by numerical examples.
Geometrical nonlinear Space steel frame 3-D rotation Stiffness matrix
Lian-Kun Wang Ji-Ping Hao Zhou Li
Civil and Architecture Department, Wuyi University, Jiangmen 529020, P.R. China School of Civil Engineering, Xian University of Architecture & Technology, Xian 710055,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
1089-1094
2008-10-19（万方平台首次上网日期，不代表论文的发表时间）