GNGTS 2016 - Atti del 35° Convegno Nazionale

370 GNGTS 2016 S essione 2.2 band 0.5-20 Hz and smoothed using a triangular average on frequency intervals of ± 10% of the central frequency. In Figure 1b results obtained for free field HVNR measurements in the area of “Palazzo Boscarino”, are shown. As concern the measurement performed inside the buildings to observe the influence of the geometry, the two main axes of sensors are oriented as coincident with the main directions of the building (NS ≡ T ≡ transverse ≡ minor axis; EW ≡ L ≡ longitudinal ≡ major axis) in order to better highlight their respective contribution (Fig. 2a). As fundamental period for each building we considered the peak with the higher amplitude in SSNR (Fig. 2b). Fig. 2 – a) Positions of the ambient noise recording sites at different floors; C indicates the measurements performed in central part of each floor. L1 and L2 indicate the two opposite boundaries of the building respectively. b) HSSR graphs concerning the ambient noise measurements performed at the different floors of Palazzo Boscarino.