The aim of the paper is to analyse the 2D static behaviour of a masonry wall belonging to the church of St. George, one of the most famous churches in Ferrara (Italy). A 3D survey of the wall was carried out by means of a 3D laser scanner which allowed the acquisition of the metric data of the external surface in terms of point clouds. These were then processed and transformed into a suitable 2D model on which an incremental analysis was performed within a special Boundary Element Technique. A thermodynamic consistent formulation for elastic-damaged materials is presented. The approach offers the possibility to simulate the mechanical behaviour of history-dependent materials irreversibly degenerating under mechanical loads. The Boundary Element Method (BEM) is applied in order to obtain the numerical results. It is coupled to the arclength methods in order to enable solution algorithm to pass limit points. Particularly for snap-back behaviour, the arclength methods are the only procedures which enable to follow the equilibrium path. Both a wall specimen and a portion of the cloister of the church under vertical loading are considered.
BEM damage analysis of historical masonry walls
MALLARDO, Vincenzo;TRALLI, Antonio Michele
2004
Abstract
The aim of the paper is to analyse the 2D static behaviour of a masonry wall belonging to the church of St. George, one of the most famous churches in Ferrara (Italy). A 3D survey of the wall was carried out by means of a 3D laser scanner which allowed the acquisition of the metric data of the external surface in terms of point clouds. These were then processed and transformed into a suitable 2D model on which an incremental analysis was performed within a special Boundary Element Technique. A thermodynamic consistent formulation for elastic-damaged materials is presented. The approach offers the possibility to simulate the mechanical behaviour of history-dependent materials irreversibly degenerating under mechanical loads. The Boundary Element Method (BEM) is applied in order to obtain the numerical results. It is coupled to the arclength methods in order to enable solution algorithm to pass limit points. Particularly for snap-back behaviour, the arclength methods are the only procedures which enable to follow the equilibrium path. Both a wall specimen and a portion of the cloister of the church under vertical loading are considered.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
