Historic Multi-Leaf Masonry Walls: Experimental and Numerical Research
Author
A ANZANI*, L BINDA*, M A RAMALHO** and A TALIERCIO*
* Dept. of Structural Engineering, Politecnico di Milano, Italy
** São Carlos School of Engineering, University of São Paulo, Brasil
Abstract
Following several failures of historic buildings occurring in the recent past, a research programme was carried out with the aim of investigating the mechanical behaviour of multiple-leaf stone masonry walls. A number of experimental tests were performed on three-layered specimens,consisting of two external leaves made of regularly cut stones and mortar joints, and an internal leaf simulating a rubble filling. The tests differed in terms of interface geometry, the type of stone used and the loading conditions. A numerical model was developed to predict the non-linear response of the specimens. The model is characterized by a damage tensor which allows for the description of the damage-induced anisotropy accompanying the cracking process. Comparisons between the predicted and measured failure loads and average stiffness of the specimens are quite satisfactory in most of the cases studied. The numerical procedure still needs to be improved to describe accurately the post-peak behaviour, by avoiding meshdependency effects related with the strain-softening behaviour of the material.
Key words
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