<p>Pedestrian bridge design is becoming more demanding and challenging as architects create new ways to experience bridges. This is particularly evident in the design of cable supported pedestrian structures.</p><p>Innovative and creative concepts require a higher level of fatigue testing to verify cable systems meet design demands and reach service design life.</p><p>The Scioto River Pedestrian Bridge is one such example of innovative pedestrian bridge design. The structure is a suspension bridge with a non-redundant main cable system. Cable supported pedestrian bridges have demonstrated a proclivity for fatigue issues in the past. To address this concern, refined fatigue testing requirements were developed which were intended to verify that the cable system and manufacturing quality control were fit for the unique structure demands. The lessons learned through the process of design, testing, and construction of the cables on this project are useful tools for teams seeking to successfully deliver future cable supported bridge projects.</p>
<p>Pedestrian bridge design is becoming more demanding and challenging as architects and engineers utilize the full measure of design ability available with current design software. This presentation will review the design process for the more unique aspects of this suspension bridge. The presentation will conclude with lessons learned during the design process. Observations from the design of this bridge will form the basis of recommendations for the enhanced design and testing specifications for cable supported bridges.</p>
<p>San Diego has recently built a new baseball stadium in the heart of the downtown area of the city. As part of an attempt to revitalize the area, the city has commissioned a landmark pedestrian bridge from the new ballpark – over the local trolley tracks, over several sets of freight train tracks, and over a busy downtown thoroughfare – to the recently expanded convention center and the San Diego Bay. The bridge design is a self-anchored suspension bridge with a single inclined pylon. The main span of the bridge is 108m and the pylon is 40m tall. The pylon is inclined at a 60 degree angle from the horizontal and leans over the deck to support the single pair of suspension cables. 34 individual suspenders attached to the main cable support the deck from the top of the railing at one edge of the deck only. The unbalanced support conditions generate a large overturning moment due to dead and live loads on the deck. To balance this overturning moment, the bridge is horizontally curved in plan and a longitudinal tendon is placed at the top of the railing. The radial force generated by the tendon above the deck elevation generates a restoring moment which balances the forces in the bridge deck. The bridge will complete the link between the downtown and the San Diego Bay as well as serving as an icon to the city of San Diego.</p>
<p>This will be the second cable-stayed bridge in the city of Los Angeles. In order to mitigate the potential for resonant vibrations during passage of groups of equestrians, a system of tuned mass dampers was designed for the bridge. High-stressed cables are incrementally attached to the 38-meter-tall mast and configured in a fan pattern.</p>
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.