Abstract
In the present paper, the results of an experimental research on the monoaxial and low cycle fatigue behaviour of butt-welded joints and cruciform specimens, relised from B450C Tempcore reinforcing steel, are presented. The objective of the research is to establish whether welding of Tempcore reinforcement may safely be adopted in seismic regions, with particular reference to the critical regions of reinforced concrete structures. The results show that butt-welding should not be permitted in plastic hinges, at least until a proper cyclic test procedure is codified, whereas properly performed spot welds between stirrups, and longitudinal bars may safely be applied.
Résumé
Dans notre article sont présentés les résultats expérimentaux du comportement monotone uniaxial et en fatigue (faible nombre de cycles) de joints soudés à la tête et en croix réalisés en acier Tempcore. Le but de la recherche est d’établir s’il est possible d’utiliser des reforts en acier tempéré soudés dans des zones à risque sismique. Une attention particulière est dédiée aux régions critiques de structure en béton armé. Les résultats démontrent que les joints soudés ne peuvent pas être utilisés en correspondance de charnières plastiques, à moins de codifier un test cyclique spécifique, alors que, par contre, il est possible d’utiliser de manière sûre des jointures soudées à l’aide de points entre des plaques et des barres longitudinales.
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Editorial Note The Politecnico di Milano is a RILEM Associate Member.
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Riva, P., Franchi, A. & Tabeni, D. Welded Tempcore reinforcement behaviour for seismic applications. Mat. Struct. 34, 240–247 (2001). https://doi.org/10.1007/BF02480595
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DOI: https://doi.org/10.1007/BF02480595