Investigation procedures for the diagnosis of historic masonries

The Friuli, Irpinia and Umbria earthquakes, and subsequent experiences, have emphasized the need for adequate damage assessment prior to seismic rehabilitation. Furthermore, assessment can be enhanced by preventive studies under the guidance of those in charge of hazard mitigation (architects, engineers, etc.). Research procedures must be defined so that findings can be used for damage assessment and as input data for structural analysis and control models. This paper provides evaluations of in-situ and laboratory tests on materials for existing unreinforced masonry structures and, in particular, touches upon the difficulty of interpreting the results of NDE tests. Also, the need for a design of the investigation prepared by persons responsible for the rehabilitation is indicated.