کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1702470 | 1012332 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Avaliação do comportamento inelástico de colunas e pórticos metálicos com flexão em torno do eixo de menor inércia
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This work presents an evaluation of the inelastic behavior of steel structures subjected to minorâaxis bending. Profiles type I and compact crossâsections are considered. In these sections, the bent about weak axis presents important benefits, such as the ability to develop all of their plastic resistance without the occurrence of lateral torsional buckling. A nonlinear beamâcolumn element formulation is adopted, in which the steel yielding process is accounted by the refined plasticâhinge method. In this method the effects of material yielding are captured by a parameter that reduces the structural member stiffness with the development of crossâsection plastic regions. The tangent modulus approach is used to consider the stiffness degradation caused by the increase in internal forces. Second-order effects, residual stresses and geometric imperfections are also considered in analysis. To define the crossâsection strength ultimate limit state, the study adopts strength surfaces that describe the interaction between internal forces - axial force and bending moment. The nonlinear equations at the structural system level are solved using the NewtonâRaphson iterative strategy coupled with pathâfollowing methods. Isolated steel columns and portal frames are analyzed, and the results obtained are compared to those of other investigators. The comparison shows that the numerical methodology presented in this work is effective and can be used for predicting the behavior of steel structures with members under minorâaxis bending.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Revista Internacional de Métodos Numéricos para Cálculo y Diseño en IngenierÃa - Volume 32, Issue 1, JanuaryâMarch 2016, Pages 13-21
Journal: Revista Internacional de Métodos Numéricos para Cálculo y Diseño en IngenierÃa - Volume 32, Issue 1, JanuaryâMarch 2016, Pages 13-21
نویسندگان
G.A. Gonçalves, A.R.D. Silva, R.A.M. Silveira,