کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
284965 | 509173 | 2013 | 13 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Inelastic analysis of steel frames with a solid-like finite element Inelastic analysis of steel frames with a solid-like finite element](/preview/png/284965.png)
• Procedure for inelastic analyses of steel frames with a solid-like finite element.
• The nonlinear formulation is based on generalized unconstrained vectors and positions.
• The plastic flow rule can generate both associative and non-associative procedures.
• Consider the combined effect of shear and normal stresses in 3-D plasticity.
• The results prove the accuracy of the procedure to inelastic analysis of steel frames.
Inelastic analyses of steel frames with a solid-like nonlinear finite element based on generalized unconstrained vectors and positions are presented in this article. The adopted plastic flow rule is an alternative generating both associative and non-associative procedures. The finite element cross section considers non-homogeneous materials and its general representation is three dimensional. The continuous mapping is done by generalized unconstrained vectors, i.e., non-unitary vectors that do not maintain the orthogonality between them after deformation. The consideration of initially curved elements, warping mode, complete 3D constitutive model, any cross section geometry (open, closed, branched, cellular, solid etc), arbitrary reference line, geometrically exact description and strain with linear variation along transverse direction, allows some applications that cannot be done by usual beam elements. As complete three-dimensional constitutive law and improved Reissner kinematics are adopted, simulations consider the combined effect of shear and normal stresses in three-dimensional plasticity. Analyses of classic examples presented in literature are used to validate results and one analysis of a warping dependent problem is shown in order to demonstrate the generality of the proposed element. These analyses include initial geometric imperfections, residual stresses, large displacements, warping, rotations, complete 3D constitutive model, any cross section geometry (open, closed, branched, cellular, solid etc), arbitrary reference line, geometrically exact description and strain with linear variation along transverse direction. The results obtained prove the accuracy of the developed finite element and its formulation when applied to inelastic analysis of steel frames.
Journal: Journal of Constructional Steel Research - Volume 86, July 2013, Pages 140–152