Fatigue Testing of Cables – Issues and Lessons Learned

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.

Innovative and creative concepts require a higher level of fatigue testing to verify cable systems meet design demands and reach service design life.

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.

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