Nonlinear Analyses of Tuff Masonry Walls Strengthened with Cementitious Matrix-Grid Composites
Publication: Journal of Composites for Construction
Volume 13, Issue 4
Abstract
Previous experimental studies, conducted by some of the authors, on in-plane response of tuff masonry walls strengthened with an innovative cementitious matrix composite grid (CMG) system confirmed that the CMG system could satisfy basic design requirements such as compatibility with the tuff masonry support (i.e., in terms of good bond properties), reversibility of the intervention and strengthening effectiveness. However, very large scatter was found in the experimental outcomes. Micromodeling and some parametric analyses were adopted to understand the contribution of basic material (mortar, tuff blocks and CMG strengthening) and the effect of the workmanship defects on the structural behavior of a natural stone wall. In order to conduct the analyses, finite-element method models of the elements have been compared to experimental data and they were found to be in good agreement with the test data. Significant improvements of strength and in the postpeak response were achieved installing different layouts of the CMG system. However the strengthening intervention had a negligible influence on the initial stiffness of the walls and this means that it has a reduced impact on the behavior of the existing structure.
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Acknowledgments
The analyses were developed within the activities of Rete dei Laboratori Universitari di Ingegneria Sismica–ReLUIS for the research program funded by the Dipartimento di Protezione Civile–Progetto Esecutivo 2005–2008.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 13 • Issue 4 • August 2009
Pages: 243 - 251
Copyright
© 2009 ASCE.
History
Received: May 9, 2008
Accepted: Dec 6, 2008
Published online: Mar 6, 2009
Published in print: Aug 2009
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