NDLI: A damage index for the characterization of confined masonry subjected to lateral cyclical loads

Content Provider	Springer Nature Link
Author	Lafuente, M. Cruz, M. Genatios, C.
Copyright Year	1998
Abstract	Dans cet article, il est proposé un indice d'endommagement pour des murs en maçonnerie confinée par des éléments en béton armé, sous chargement latéral cyclique. L'indice en question, basé sur la dégradation de la raideur latérale, est fonction du niveau de déformation du mur.Une méthodologie simplifiée permet d'estimer le comportement des murs, avec l'utilisation de la méthode des éléments finis et d'un paramètre (m), recalé au moyen des données expérimentales provenant d'expériences sur neuf murs en maçonnerie de briques creuses. Cette méthodologie permet de trouver la raideur latérale des murs pour chaque cycle de chargement. Avec la valeur suggérée de m égal à 0,93, la méthodologie proposée permet d'approcher la raideur des murs testés, avec une erreur de 17%. L'indice d'endommagement a été estimé avec 15% d'erreur moyenne. Si les résultats obtenus sont satisfaisants, il s'avère toutefois nécessaire de calibrer la valeur de m pour d'autres types de maçonnerie.The use of a damage index based on stiffness degradation is proposed for the characterization of confined masonry walls submitted to lateral cyclical loads. The damage index, based on the degradation of the lateral stiffness, varies according to the deformation level of the wall.A simplified methodology is presented to estimate the wall behavior using the finite element method. The use of an m parameter is proposed, adjusted through available experimental data of nine natural-scale walls made of hollow bricks, in order to approximate lateral stiffness in each load cycle. With the suggested m value of 0.93, the stiffness of tested walls was predicted, with an average error of 17%. The damage index was estimated with an average error of 15%. Although the results are satisfactory, it is nevertheless necessary to calibrate the value m for other types of masonry.
Starting Page	692
Ending Page	698
Page Count	7
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	31
Issue Number	10
e-ISSN	18716873
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1998-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Theoretical and Applied Mechanics Structural Mechanics Mechanical Engineering Operating Procedures, Materials Treatment Civil Engineering Building Materials
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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