122 I. Capraro and C.E. Ventura Fig. 16.1 North elevation of the Parkade from East Mall and Hospital Ln Fig. 16.2 Additional RC columns to shear walls, under construction four locations on the longitudinal edges of the parking ramps (Figs. 16.4 and 16.5). A further intervention was performed on the internal timber bumpers, which have been substituted with reinforced concrete curbs at all levels, as shown in Figs. 16.6 and 16.7. 16.3 Ambient Vibration Test The ambient vibration test was performed on Saturday March14th, 2015 at the Health Sciences Parkade at the University of British Columbia in Vancouver by a group of five graduate students. During this period, the Parkade was experiencing a lower level of traffic than a regular weekday. A total of nine Tromino sensors [1] have been used to perform the ambient vibration test. One sensor was kept as reference at the second floor, while the remaining eight sensors were placed at the corners of the slabs and on the ramps of the structure. These roving sensors were arranged in a total of five different setups
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