Title: Innovative precast concrete adjacent-box-beam system implemented in the St. Clair Road bridge in Michigan
Date Published: May - June 2018
Volume: 63
Issue: 3
Page Numbers: 41 - 50
Authors: Chuanbing S. Sun, Maher K. Tadros, Kyle C. Kopper, and Talia N. Belill
https://doi.org/10.15554/pcij63.3-01
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Abstract
The St. Clair Road bridge over the Maple River in Clinton County, Mich., uses an innovative unbonded post-tensioning system in precast concrete adjacent box beams that eliminates the need for grouting post-tensioning ducts and for a cast-in-place concrete deck slab, resulting in accelerated bridge construction. The transverse unbonded post-tensioning tendons in both the top and bottom flanges of the beams eliminate the need for intermediate diaphragms. More important, this system enhances the overall structural performance by eliminating reflective cracks above the longitudinal joints because the joints are in permanent compression. As a result, it will likely reduce long-term costs by potentially reducing the frequency of repairs and maintenance.
References
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