Seismic Upgrading - Retrofitting of Bridges
This very large super elevated freeway intersection required increased bearing capacity of the substructure to satisfy transversal flexural seismic demands.
New post-tensioned transversal pier cap beams were added on each side and extended beyond the ends of the existing structure. Sixteen 15-0.6" tendons with DYWIDAG Multiplane Anchorages (MA) were installed.
The upper tendons were conducted in pairs through holes drilled into the webs of the existing bridge girders. Large forces and confined space at some of the pier cap beams resulted in the first time use of DYWIDAG 37-0.62" Strand Tendons in California.