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Resistance prediction of laminates, fillet‐welded and full penetration‐welded bolted T‐stub connections
Bolted end plate connections are usually considered an optimal alternative in rigid‐frame steel design because they have competitive costs and good structural behaviour. The characterization of this type of connection is defined by the moment‐curvature relationship in terms of strength, stiffness and ductility, and the method of components is the analytical procedure proposed by the Eurocode standard to predict the rotational behaviour. The T‐stub is the component that idealizes the transfer of tensile forces in components of the column flange and the endplate in bending components and is composed by one T‐shape element made of a web in tension joined to a flange in bending. The connection between the web and the flange can be set continuously (in rolled profiles) or welded, and the type of welding procedure considered, fillet or by full penetration, depends on the type of loads that the connection is submitted. e.g., in the case of dynamically loaded structures, in machinery supports or structures emplaced on seismic zones, is recommended the use of full penetration to avoid a premature failure by fatigue.
This paper exposes the study results of the influence of the three types of connections between the web and the flange in T‐stub connections. Monotonic loading tests, applied by a universal test machine and analysed by the Digital Image Correlation technique, have been performed at laboratories of the Pontificia Universidad Católica del Perú. Results, represented by Force‐displacement characteristics curves and strains and stresses fields, are compared with the evaluation of analytical formulae, and the results of a FEM model developed to analyse the component. The conclusions are that the type of connections between the web and the flange greatly influences the T‐stub behaviour. Currently, the bibliography defines specific values for the variable m (defined as the equivalent distance from the centre of a fastener to the plastic hinge form near to the web face) for cases of laminated or fillet welded T‐stub connections. However, there is no prescription to analyse the structural behaviour of T‐stub welded by full penetration. We recommend a deeper study for this typology of connections to propose additional values in future versions of the Eurocodes.
Resistance prediction of laminates, fillet‐welded and full penetration‐welded bolted T‐stub connections
Bolted end plate connections are usually considered an optimal alternative in rigid‐frame steel design because they have competitive costs and good structural behaviour. The characterization of this type of connection is defined by the moment‐curvature relationship in terms of strength, stiffness and ductility, and the method of components is the analytical procedure proposed by the Eurocode standard to predict the rotational behaviour. The T‐stub is the component that idealizes the transfer of tensile forces in components of the column flange and the endplate in bending components and is composed by one T‐shape element made of a web in tension joined to a flange in bending. The connection between the web and the flange can be set continuously (in rolled profiles) or welded, and the type of welding procedure considered, fillet or by full penetration, depends on the type of loads that the connection is submitted. e.g., in the case of dynamically loaded structures, in machinery supports or structures emplaced on seismic zones, is recommended the use of full penetration to avoid a premature failure by fatigue.
This paper exposes the study results of the influence of the three types of connections between the web and the flange in T‐stub connections. Monotonic loading tests, applied by a universal test machine and analysed by the Digital Image Correlation technique, have been performed at laboratories of the Pontificia Universidad Católica del Perú. Results, represented by Force‐displacement characteristics curves and strains and stresses fields, are compared with the evaluation of analytical formulae, and the results of a FEM model developed to analyse the component. The conclusions are that the type of connections between the web and the flange greatly influences the T‐stub behaviour. Currently, the bibliography defines specific values for the variable m (defined as the equivalent distance from the centre of a fastener to the plastic hinge form near to the web face) for cases of laminated or fillet welded T‐stub connections. However, there is no prescription to analyse the structural behaviour of T‐stub welded by full penetration. We recommend a deeper study for this typology of connections to propose additional values in future versions of the Eurocodes.
Resistance prediction of laminates, fillet‐welded and full penetration‐welded bolted T‐stub connections
Aquino, Giovani Jesus Berrospi (author) / Alatrista, Gustavo Alberto Neira (author) / Miranda, Walter Guillermo Loaiza (author) / Aparcana, Carlos Alberto Juárez (author) / Miranda, Jorge Hernán Alencastre (author) / de Cisneros Fonfría, Juan José Jiménez (author)
ce/papers ; 4 ; 981-988
2021-09-01
8 pages
Article (Journal)
Electronic Resource
English
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