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Nesse trabalho, é apresentado um estudo de ligações soldadas dos tipos K e KT com barras afastadas, formadas por perfis tubulares de aço estrutural, sem costura, de seção transversal retangular no banzo e circular para as diagonais e montante. O estudo envolve geração, análise e calibração de modelos numéricos em elementos finitos, a partir de resultados obtidos em ensaios experimentais, realizados anteriormente, com protótipos em escala real. Foram analisados diversos modelos com elementos de casca, avaliando a influência do raio de dobramento dos perfis retangulares, bem como algumas alternativas de modelagem da solda das ligações. As análises realizadas apresentam boa correlação com os resultados experimentais. This work presents a study of welded gap K- and KT-joints formed by seamless steel hollow structural sections with rectangular hollow section for the chords and circular hollow section for the members. The study involves the generation, analysis and calibration of numerical models based on the finite element method, by comparison with experimental results previously obtained with full-scale prototypes. Several models were analyzed with shell elements, evaluating the radius of corner influence on the rectangular hollow section, as well as some modeling alternatives of the welds in the connections. The results of the computational analysis are in good agreement with the experimental results

Análise de ligações em perfis tubulares de aço do tipo K e KT com afastamento entre as diagonais e o montante