Design of Prestressed Barrier Cable Systems-Design of Prestressed Barrier Cable Systems

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Video Summary

In a recent webinar by the Post-Tensioning Institute, the focus was on the design and analysis of barrier cable systems, a critical component in parking structures. Moderator Kyle Boyd and presenter Dr. C. Faxey delved into PTI's recent experimental program, which involved testing static and dynamic loads on barrier cables to determine the best design practices. Conducted on a 20-foot span to simulate short-span conditions, the tests assessed the strain tensions during both static and dynamic events, comparing them to theoretical predictions.<br /><br />The key takeaway from the program was the importance of using both the equivalent static method with a factored load and the energy method for more accurate design, especially for short spans. The analysis revealed that short spans often require the energy method to control the design, as the IBC method isn't conservative enough in these scenarios. The webinar also provided detailed design examples and highlighted the importance of considering deflection limits, additional supports, and construction and maintenance procedures to ensure the effectiveness and safety of the barrier cable systems. The session underscored the need for consistent and clear design guidelines across projects, which will be detailed further in the next webinar session focused on construction, maintenance, and repair.

Keywords

Post-Tensioning Institute

barrier cable systems

parking structures

static and dynamic loads

design practices

energy method

short spans

deflection limits

construction and maintenance