STRUCTURAL RESPONSE OF K AND T TUBULAR JOINTS UNDER STATIC LOADING Luciano R. O. de Lima, Pedro C. G. da S. Vellasco, Sebastião A. L. de Andrade Structural Engineering Department, UERJ, Rio de Janeiro, Brazil [email protected]; [email protected]; [email protected] José G. S. da Silva Mechanical Engineering Department, UERJ, Rio de Janeiro, Brazil [email protected] Luís F. da C. Neves Civil Engineering Department, Coimbra, Portugal [email protected] Mateus C. Bittencourt Civil Engineering Post-Graduate Program, UERJ, Rio de Janeiro, Brazil [email protected] Abstract: The intensive worldwide use of tubular structural elements, mainly due to its associated aesthetical and structural advantages, led designers to be focused on the technologic and design issues. Consequently, their design methods accuracy plays a fundamental role when economical and safety points of view are considered. Additionally, recent tubular joint studies indicate further research needs, especially for some joint geometries. In this work, a nonlinear numerical analysis based on a parametric study is presented, for K and T tubular joints where both chords and braces are made of hollow tubular sections. Starting from test results available in the literature, a model has been derived, taking into account the weld geometry, material and geometric nonlinearities. The proposed model was validated by comparison to the experiments, analytical results suggested on the Eurocode 3 (2003) and to the classic deformation limits proposed in literature. INTRODUCTION Structural hollow sections (Figure 1) are widely used by designers, due to their aesthetical and structural advantages (Packer et al., 1992). On the other hand, the adoption of tubular sections frequently leads to more expensive and complex connections, since there is no access to the interior of the connected parts. This problem can be solved by special blind bolted connections or, more frequently, by the extensive use of welded joints. In addition to the fabrication costs, a proper connection design has to be performed since their behaviour frequently governs the overall structural response. This paper deals with the structural behaviour of SHS “T” joints and CHS “K” joints widely used in trusses under static loading (Figure 2). The effects of shear, punching shear and bending are considered to predict the possible joint failure mechanisms.
STRUCTURAL RESPONSE OF K AND T TUBULAR JOINTS UNDER STATIC LOADING
Jul 01, 2023
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