Generalised beam theory (GBT) formulation to analyse the vibration behaviour of thin-walled steel frames

Autor(es)

Basaglia, Cilmar ^[1] ; Camotim, Dinar ^[2] ; Coda, Humberto Breves ^[3]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Civil Engn Architecture & Urban Design, Dept Struct Engn, Av Albert Einstein 951, BR-13083852 Campinas, SP - Brazil

^[2] Univ Lisbon, Inst Super Tecn, DECivil, CERIS, ICIST, Av Rovisco Pais, P-1049001 Lisbon - Portugal

^[3] Univ Sao Paulo, Sao Carlos Sch Engn, Struct Engn Dept, Av Trabalhador Saocarlense 400, BR-13566590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: THIN-WALLED STRUCTURES; v. 127, p. 259-274, JUN 2018.
• Citações Web of Science: 3

Resumo

This paper reports the results of an investigation on the use of Generalised Beam Theory (GBT) to analyse the vibration behaviour of thin-walled steel frames. After an overview of the main concepts and procedures involved in performing a GBT vibration analysis, the formulation and implementation of a GBT-based beam finite element are presented, namely the determination of the finite element and frame linear stiffness and mass matrices (incorporating the influence frame joint configurations). Finally, in order to illustrate the application and capabilities of the proposed GBT-based finite element formulation, numerical results concerning the local, distortional and global vibration behaviour of (i) a symmetric portal frame and (ii) an ``L-shaped{''} frame exhibiting four commonly used joint configurations are presented and discussed. For validation purposes, some GBT results (frequency values and vibration mode shapes) are compared with values yielded by ANSYS shell finite element analyses. (AU)

• Processo FAPESP: 11/17557-2 - Novos Desenvolvimentos e Aplicações da Teoria Generalizada de Vigas para Estruturas Metálicas: Plasticidade, Vibração e Programas Computacionais
• Beneficiário: Cilmar Donizeti Basaglia
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 11/15731-5 - Desenvolvimento e disponibilização de softwares de simulação em mecânica computacional: consolidação do laboratório de informática e mecânica computacional LIMC - Wilson Sérgio Venturini
• Beneficiário: Humberto Breves Coda
• Modalidade de apoio: Auxílio à Pesquisa - Temático