3D macro-element for innovative plug-and-play joints
C. V. Miculaş (Universidade de Coimbra)
R. J. Costa (Universidade de Coimbra)
Luís Da Silva (Universidade de Coimbra)
Rui Simoes (Universidade de Coimbra)
Hélder Craveiro (Universidade de Coimbra)
Trayana Tankova (TU Delft - Steel & Composite Structures)
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Abstract
This paper presents the development, implementation, and validation of a macro-element suitable for the linear analysis of innovative 3D plug-and-play joints between tubular columns and lightweight steel truss-girders. The macro-element is based on the component method, accounts for the three-dimensional interaction between the tube faces, and its components have a clear physical meaning. Simplified procedures are developed for the closed-form computation of the stiffness matrix of the macro-element based on the geometric and mechanical properties of the nodal zone. This facilitates practical application in everyday design scenarios. Furthermore, the macro-element's architecture is implemented in the framework of OpenSees as a standalone beam-to-column joint finite element. Validation of the conceptual design is accomplished through parametric studies, comparing its performance with models generated in higher-order finite element commercial software, Abaqus. This research offers a valuable resource for the linear analysis and design of innovative 3D plug-and-play joint connections in structural engineering, enhancing efficiency and reliability in construction practices.
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