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Structural Engineering and Mechanics Volume 21, Number 4, November10 2005 , pages 469-494 DOI: https://doi.org/10.12989/sem.2005.21.4.469 |
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Infilled frames: developments in the evaluation of cyclic behaviour under lateral loads |
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L. Cavaleri, M. Fossetti and M. Papia
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| Abstract | ||
| In order to consider the modified seismic response of framed structures in the presence of masonry infills, proper models have to be formulated. Because of the complexity of the problem, a careful definition of an equivalent diagonal pin-jointed strut, able to represent the horizontal force-interstorey displacement cyclic law of the actual infill, may be a solution. In this connection the present paper, continuing a previous work in which a generalised criterion for the determination of the ideal cross-section of the equivalent strut was formulated, analizes some models known in literature for the prediction of the lateral cyclic behaviour discussing their field of validity. As a support of the discussion, the results of an experimental investigation involving single story-single bay infilled reinforced concrete. Frames under vertical and lateral loads with different kind of infill (actually not yet so much investigated) are presented. Finally, an improvement of a model known in the literature is proposed, taking the results of the experimental tests before mentioned into account. | ||
| Key Words | ||
| infilled frames; masonry infill; stiffening effect; hysteretic behaviour; simplified model; equivalent strut. | ||
| Address | ||
| Dipartimento di Ingegneria Strutturale e Geotecnica, Universita di Palermo, Viale delle Scienze, 90128 - Palermo, Italy | ||