|
|
|||||
|
|||||
|
A Post Conference Symposium will be held in Venice on March 30,2005 |
|||||
DI TOMMASO, Angelo Istituto Universitario di Venezia Venezia - Italy adt@iuav.it ROTS, Jan Technische Universiteit Delft Delft - The Netherlands j.g.rots@bk.tudelft.nl |
|||||
|
||||
|
|
||||
| BINDA, Luigia Politecnico of Milan - DIS (Dept of Structural Engineering) Milan - Italy binda@stru.polimi.it Abstract The collapse of monumental buildings, which have occurred during the last fifteen years, enforces the structural analysis for the safety assessment of ancient constructions to take into account specific aspects, that were not considered relevant by the traditional stress-strain analysis. Among the factors which are peculiar of ancient masonry structures, there are some that require special attention; (i) the material is not continuous, nor homogeneous and nor isotropic, (ii) the masonry texture strongly influences the stress distribution, (iii) the stress state due to the dead load has been acting with very high values compared to the strength of the material for centuries, (iv) the dimensions of the structure are often considerable. In particular, the creep behaviour and the creep-fatigue interaction have shown to strongly influence the mechanical behaviour of historic constructions causing a continuous damage of their mechanical properties. Fracture mechanics will probably in the future help understanding long term behaviour of complex and heavy masonry structures. It is important now to collect as much as possible proposed implementation of experimental procedures and of mathematical models on the subject. |
||||
