Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/10261
Title: Numerical analysis of truss systems with stiffened flattened end-bars.
Authors: Mazon, Ana Amélia Oliveira
Sarmanho, Arlene Maria Cunha
Nunes, Gabriel Vieira
Amparo, Lucas Roquete
Neiva, Luiz Henrique de Almeida
Souza, Flávio Teixeira de
Keywords: Steel structures
Plane trusses
Circular hollow sections
Issue Date: 2018
Citation: MAZON, A. A. O. et al. Numerical analysis of truss systems with stiffened flattened end-bars. Latin American Journal of Solids and Structures, v. 15, n. 3, p. 1-24, 2018. Disponível em: <http://www.scielo.br/scielo.php?pid=S1679-78252018000300504&script=sci_abstract&tlng=en>. Acesso em: 03 mai. 2018.
Abstract: Circular hollow sections are usually used in long-span roof truss systems. One of the typology for connecting elements in such structures involves the flattening of bar ends. This article presents the numerical analysis of a plane truss composed of circular hollow sections, in which diagonal bars have flattened ends. In this sense, a new flattening typology called stiffened flattening is proposed, characterized by a non-flat geometry, with the creation of stiffeners in the lateral edges of the diagonal flattened ends. The diagonal connecting system with the chord members uses connecting plates. The plates are welded to the chords and the diagonals are connected to latter through a single bolt. The numerical analysis using finite elements method was developed in two stages through ANSYS software with the Parametric Design Language (APDL), in which parameters such as geometry, materials, element types, boundary conditions and loads are specified. A non-linear analysis was performed using shell elements on the chords, diagonals, plates and welds, and contact elements between the diagonals with stiffened flattened ends and the connecting plates. Initially, a numerical study of the connecting node and the stiffened flattened end was performed, and the results directed the modeling of the plane truss. The numerical results were calibrated with the experimental truss results in full scale. The numerical result of the plane truss was also compared to a theoretical study, considering the axial load eccentricity applied in the diagonal with stiffened flattened ends. The study was based on the consideration of combined effects of axial force and bending moment provided by the Brazilian standard ABNT NBR 8800:2008. The final results indicate that the numerical model proposed is efficient and has good correlation with the experimental and theoretical results.
URI: http://www.repositorio.ufop.br/handle/123456789/10261
ISSN: 16797825
metadata.dc.rights.license: O periódico Latin American Journal of Solids and Structures permite 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: 03 jan. 2017.
Appears in Collections:DECIV - Artigos publicados em periódicos

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