FINITE ELEMENT ANALYSIS OF COLD-FORMED PERFORATED LIPPED CHANNEL COLUMNS UNDER DISTORTIONAL BUCKLING

Authors

  • Aline Fátima Nascimento Pereira
  • Arlene Maria Cunha Sarmanho
  • Flávio Teixeira de Souza IFMG Campus Ouro Preto

Abstract

Cold-formed Steel Profiles are widely used due to their versatility and economy. The large range of transversal sections developed to solve various design applications and the use of high strength steel demands a stability analysis due to different buckling modes that may modify their behavior and reduce their resistance. Special attention must be taken to distortional buckling mode due to lack of analytical formulae and the inexistence of post-critical resistance, which may lead to sudden collapse. These structures may have their resistance and behavior modified by perforations to fit connections or accommodate electrical end hydraulic installations. This work analyzes the influence of perforations dimensions and position in cold-formed lipped channels columns, by Finite Element Method in software ANSYS. Different sections and perforations were analyzed, and it was observed that holes always reduce the column resistance. Two perforations lines symmetrical axially reduce the resistance more than one perforation line axially disposed in the lipped channel web. In columns with two perforation lines, that distance between hole and the web lateral edge do not induce significant resistance reduction, and the increase in holes horizontal dimension leads to less resistant columns.

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Published

2024-03-26

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Artigos

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