Alvarenga, Arthur Ribeiro deSilveira, Ricardo Azoubel da Mota2013-10-212013-10-212009ALVARENGA, A. R. de; SILVEIRA, R. A. da M. Second-order plastic-zone analysis of steel frames. Part II : effects of initial geometric imperfection and residual stress. Latin American Journal of Solids and Structures, v. 6, n. 4, p. 323-342, out. 2009. Disponível em: <http://www.lajss.org/index.php/LAJSS/article/view/176/205>. Acesso em: 09 set. 2013.http://www.repositorio.ufop.br/handle/123456789/3372The application of a second-order plastic-zone formulation to study the minimum requirements needed to arrive at the so called advanced analysis concept, where an individual member’s check is simplified or even unnecessary, is presented in this paper. A companion paper provides the theoretical background for this formulation. These requirements appear in specifications and refer to the unavoidable imperfections of steel structure construction leading to premature collapse. The structure’s out-of-plumbness and members’ out-of-straightness form the initial geometric imperfections, affecting building stability and lateral drift, but are justifiable under manufacturing and erection tolerances. Unequal cooling of a steel section, after the rolling or welding process, creates residual stress that increases the plasticity path. As the plastic zone analysis accounts for these three imperfections in an explicit way, alone or combined, this study shows a brief review, computational implementation details and numerical examples. Finally, this work makes some recommendations to find the worst initial imperfect geometry for some loading cases.en-USSteel framesPlastic-zone methodAdvanced analysisInitial geometric imperfectionsResidual stressArtigo publicado em periodicoO periódico Latin American Journal of Solids and Structures permite ao autor o depósito de cópia em repositório institucional. Fonte: Latin American Journal of Solids and Structures <http://www.lajss.org/index.php/LAJSS/about/submissions#copyrightNotice>. Acesso em: 26 abr. 2019.