Co-rotational element of beam-column with springs for analysis of structures with semi-rigid connection

• Autor(a) principal: Souza, Luiz Antonio Farani de
• Data de Publicação: 2022
• Outros Autores: Silva, Everton Luis Consoni da
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: The Journal of Engineering and Exact Sciences
• Texto Completo: https://periodicos.ufv.br/jcec/article/view/14684
• topic: Semi-rigid connection; Orthogonal Residue; Potra-Pták; Co-rotational formulation; Hybrid element; Ligação semirrígida; Resíduo Ortogonal; Potra-Pták; Formulação corrotacional; Elemento híbrido

In most steel structural designs, beam-to-column connections are considered either perfectly flexible or fully rigid. This assumption results in an inaccurate estimate of the mechanical behavior of frames. The formulation of a beam-column co-rotational finite element with zero-length springs at its ends is presented. This element is used to discretize two structural systems with semi-rigid connection and geometric nonlinear behavior. The system of nonlinear equations, which describes the structural problem, is solved with the incremental-iterative procedure of Potra-Pták associated with the Orthogonal Residue following-path. Computer simulations are performed with the open-source program Scilab. The numerical results obtained reveal that the alteration of the connection between structural elements from rigid to semi-rigid increases the flexibility of the structure and decreases its capacity to resist applied forces.