ASPIRE. Fall 2015. Jerry Pfuntner, S.E., P.E.
Using diabolos with external post-tensioning increases design effciencies, streamlines constructability, and improves durability of segmental concrete box-girder bridges
by Jerry Pfuntner, Finley Engineering Group Inc.
Originally introduced in the 1980s, diabolos used in conjunction with external post-tensioning have fallen in and out of favor with departments of transportation over the years. Recent research and a multitude of real- life case studies, however, have even convinced many industry stalwarts that diabolos provide significant benefits over internal post-tensioning or external post-tensioning with standard bent steel pipe deviation saddles, including simplified precasting details, rapid erection procedures, improved long-term durability, and tendon replacement. Read more…