GNGTS 2015 - Atti del 34° Convegno Nazionale

256 GNGTS 2015 S essione 2.3 Fig. 3 – a) Plan of the hangar; b) results of H/H and V/V ratio, acquired on the corner of the building. It is possible to notice the importance of the torsional mode, by the much higher amplification of H/H curve relative to measures in the corner of building plan, in comparison to the one near the stairs (d); c) results of H/H and V/V ratio, acquired on the shorter side of the building. It is possible to observe that the amplification in lower that case b but higher that case d; d) results of H/H and V/V ratio, acquired next to the stairs. The stairs can be recognized as a center of stiffness, since the amplifications are lower than any other testing point.