GNGTS 2015 - Atti del 34° Convegno Nazionale

254 GNGTS 2015 S essione 2.3 the tank wall. This part of liquid, also known as the impulsive liquid, experiences the same acceleration as the ground and contributes predominantly to the base shear and overturning moment. The sloshing liquid (or convective) determines the height of the free surface waves, and hence the freeboard requirement to a safety condition. The convective and impulsive responses periods are usually calculated through the Eqs. 2 and 3 (Eurocode 8; Malhotra et al. , 2000): (2) (3) Fig. 1 – a) Deformation shape for the fundamental mode of the dam, according to H/V analysis on the crest; b) position of the galleries; c) results of H/H ratios for the crest, radial direction; d) results of H/H ratios for the crest, tangential direction; e) results of V/V ratio for the tests on the crest; f) vibrational directivity, test on bedrock outcrop; g) vibrational directivity, test on the central point on the crest of the dam.