WIND COMFORT STUDIES FOR THE VEGAS HIGH ROLLER OBSERVATION WHEEL

The Vegas High Roller is a 550 foot tall rotating observation wheel under construction in Las Vegas. It has 28 cabins, each capable of carrying 40 passengers. The efficient, lightweight structure and low natural frequencies render it susceptible to wind-induced vibrations. Spectral-based predictions show that many modes with natural frequencies between 0.3Hz and 2.5Hz could contribute to perceptible motion responses. The combined effect of these multi-mode responses on occupant comfort is difficult to assess using existing methods and criteria. In order to confirm that the performance was acceptable, purpose developed testing was conducted allowing the client and design team to experience simulated motions in a cabin for various wind events. The wind-induced motions used for this test were obtained through a wind time-history response analysis which accounted for the spatial correlation of dynamic wind pressures over the entire wheel structure. Supplemental viscous dampers are being installed in the lateral restraining system between the wheel rim and the stationary boarding platform to improve occupant comfort to a level acceptable to the client. This enables the wheel to operate under winds up to the 1-year return period level, allowing the client to maximize ticket sales.