| ABSTRACT: | NON DESTRUCTIVE TEST FOR STRUCTURAL REHABILITATION. THE CASES OF DEVIL'S
AND S.DONATO'S MASONRY BRIDGES IN VENICE
S. Russo, L. Massaria, G. Boscato
iuav University Of Venice, Venice, Italy
As much known, the use of non destructive test as a methodology to better understand the technical choices
more opportune in the field of structural reinforcement and restoration, represents by now a good way for
monument and historical manufactured. This research shows the results on non destructive test carried out
on two masonry bridges in venetian islands Torcello and Murano, named respectively Devil's bridge and
realised approximately in XII century, and S.Donato bridge's in the XVII century.
For both bridges nondestructive test (NDT) connected to destructive test (DT) to evaluate the compressive
strength of the brick and the homogeneity/compactness of the masonry has been realised.
For NDT were employed the penetrometer to measure the energy released per each hole and the Fourier
analysis setup; the first instrument gives results on mechanical performance of mortar and brick (also with
DT to deduce the curve of calibration between DT and NDT results with Fourier setup (sonic test) the
information on the homogeneity of the masonry and on the possible presence of empty were expected. Also
the endoscopy has been utilised in critical section of masonry vaults, to understand the effective stratigraphy
of structure.
The study shows also, for a structural view point, the interaction between the geometry of the structure and
the mechanical characteristics of masonry, especially in the case which the structure is very old and the
materials ( masonry and brick) show low values of mechanical performance.
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