ABSTRACT
Restoration interventions often require structural strengthening and, in ancient buildings, floors are often the part of the structure where stiffness upgrading is more frequently necessary. Moreover if seismic resistance has to be assured, a floor diaphragm behavior has to be achieved. The importance of an effective diaphragm action in the floors of a multi-storey masonry building is well-known in earthquake engineering. Thanks to the diaphragm action, in fact, the floors can transfer the lateral actions due to wind and earthquake to the lateral load resisting systems.
