2 Long-Term Performance of Specialized Fluid Dampers Under Continuous Vibration on a Pedestrian Bridge 13 Fig. 2.2 Space satellite dampers Fig. 2.3 Cutaway of frictionless hermetic damper location of the attachment points, the longest being 8.3 m long. These dampers are quite apparent to pedestrians when crossing the bridge as illustrated in Figs. 2.4 and 2.5 below. Damper Nomenclature: Deck Damper Quantity on the Bridge: 17 Description: The Deck Dampers are located under various deck sections. A very limited number can be seen from under the north end of the bridge. Most deck dampers are not visible since they are situated directly under the deck panels. Lateral motions of the bridge are transmitted to the dampers through pairs of relatively long V-shaped chevron braces as shown in Figs. 2.6 and 2.7 below. Damper Nomenclature: Vertical Damper Quantity on the Bridge: 4 Description: Vertical Dampers are located in two pairs under the south end of the bridge with damper ends connected between a structural arm and the ground. As illustrated below in Figs. 2.8 and 2.9, the dampers are directly accessible to pedestrian traffic. Nearly continuous damped motion is felt and observed with even low to moderate pedestrian traffic on the bridge overhead.
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