Abstract
The recent collapses of massive masonry structures like towers and domes have shown that the traditional stress-strain analysis is not prepared to take into account some particular aspects that are relevant for the safety assessment of ancient buildings.
In this paper, the important influence of persistent loads into the damage of historic masonry is put forward and a further step into the appraisal of creep behaviour of ancient masonry is presented. By means of an experimental and numerical investigation (carried out on the material collected from the ruins of the Civic Tower of Pavia collapsed in 1989), some significant parameters describing the deviatoric and volumetric visco-elastic behaviour of the material are detected. The aim of the research is to gain experimental knowledge as a basis for mathematical modelling of long-term behaviour of masonry structures.
Résumé
Les éroulements de structures massives en maçonnerie (tours et dômes) qui se sont récemment produits ont prouvé l’insuffisance de l’analyse structurale classique, qui ne peut pas tenir compte de certains phénomènes qui sont essentiels pour l’évaluation de la sécurité des anciens bâtiments.
Dans ce travail on examine l’influence d’un chargement prolongé sur l’endommagement des maçonneries historiques et on donne une nouvelle contribution à l’étude du comportement au fluage de la maçonnerie ancienne. On présente les résultats d’une recherche expérimentale et numérique effectuée sur des échantillons prélevés des ruines de la tour de Pavie, qui s’est effondrée en 1989: on identifie certains paramètres qui sont significatifs pour la description de la réponse visco-élastique isotrope et déviatorique du matériau. Le but de la recherche est d’accroître les connaissances expérimentales essentielles pour la modélisation mathématique du comportement à long terme des structures en maçonnerie.
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Editorial Note: Prof. Luigia Binda is Chairlady for RILEM TC 177-MDT: ‘Masonry durability and on-site testing’. She is a RILEM Fellow and a member of RILEM Technical Advisory Committee. She works at the Department of Structural Engineering, Politecnico di Milano, Italy, a RILEM Associate Member.
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Anzani, A., Binda, L. & Roberti, G.M. The effect of heavy persistent actions into the behaviour of ancient masonry. Mat. Struct. 33, 251–261 (2000). https://doi.org/10.1007/BF02479335
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DOI: https://doi.org/10.1007/BF02479335