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Experimental response of top and seat angle semi-rigid steel frame connections

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Abstract

The current study is concerned with the structural response of typical semi-rigid steel beam-to-column joints. In particular, the behaviour of bolted cleat angle connections is investigated under different loading conditions, both monotonic and cyclic loading being considered. Besides, aiming at assessing the susceptibility of the analysed connection typology to low-cycle fatigue, the latter has been referred to both constant and variable amplitude deformations. Therefore, 15 full-scale tests have been carried out by comparing the performance of specimens with reference to three different sizes of column member as well. Obtained results are provided in terms of moment-rotation relationship, dissipated energy and strength degradation per cycle. As expected, outcomes show that the main sources of inelastic deformation are located into cleat angles, which constitute the most influential component. As a consequence, the column size has a limited effect on the whole hysteretic response of the joint, while results appear to be strongly dependent on the applied deformation history.

Résumé

Dans cet article, on étudie le comportement structurel d’un type de liaisons poutre-poteau semi-rigides. La poutre et le poteau sont liés par des cornières. Les procédures de chargement que l’on a suivies incluent plusieurs cas de chargements monotones et cycliques. Pour déterminer le comportement de ces liaisons à la fatigue (petit nombre de cycles et grandes déformations plastiques), on a adopté plusieurs procédures de déplacements à amplitude constante. L’étude a été appliquée à trois types de poteaux. Comme on a considéré cinq liaisons différentes pour chaque type de poteau, un total de quinze liaisons ont été essayées. Les comportements étudiés ont été représentés sous forme de diagrammes moment—rotation, de l’énergie dissipée et de la dégradation de rigidité, et ont été comparés entre eux. Comme prévu, la déformation plastique a eu lieu surtout dans les cornières, lesquelles sont donc les éléments les plus importants de la liaison. La dimension de la section du poteau influence très peu le comportement histérétique de la liaison, lequel, d’autre part, dépend des déplacements précédemment appliqués.

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Authors and Affiliations

  1. Dept. of Civil Engineering and Architecture, Instituto Superior Técnico, Lisbon, Portugal

    L. Calado

  2. Dept. of Structural Analysis and Design, University of Naples Federico II, Italy

    G. De Matteis

  3. D.S.S.A.R., University of Chieti G. D’Annunzio, Italy

    R. Landolfo

Authors
  1. L. Calado
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  2. G. De Matteis
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  3. R. Landolfo
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Editorial Note The University of Naples is a RILEM Titular Member.

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Calado, L., De Matteis, G. & Landolfo, R. Experimental response of top and seat angle semi-rigid steel frame connections. Mat. Struct. 33, 499–510 (2000). https://doi.org/10.1007/BF02480527

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  • DOI: https://doi.org/10.1007/BF02480527

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