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Keynote: Building Bridges: An Unlimited PotentialDavid J. Morrill, PE, SE
Education Session #1: Simon Kenton Bridge Temporary Suspender Retrofit
The Simon Kenton Bridge is a steel suspension bridge that was constructed in 1931 over the Ohio River. Michael Baker performed a routine, element-level, and fracture critical inspection on the bridge in July 2019. During the inspection critical findings were discovered on the fracture critical lower hanger cable connections near the stiffening truss. The critical find resulted from the severe deterioration and broken wires observed on multiple strands comprising the suspenders. At the worst location 2 of the seven bundles of the wire rope cable had section loss approaching 100%. After the critical find was reported to KYTC, Michael Baker performed a structural analysis to determine the safe load for the structure as well as the redundancy provided by the stiffening truss if a cable were to break. In addition, Michael Baker devised a concept to strengthen the deteriorated cables utilizing European references for this kind of repair. A Contract ready proposal (CRP) was developed to expedite these critical repairs.
Jason Stith, PhD, PE, SE
Exhibitor Presentation #1:
LARSA, presented by John Horner
Education Session #2: Design and Construction of the New Frederick Douglass Memorial Bridge, Washington, D.C.
This presentation will focus on the technical aspects of designing a signature arch bridge. The 540-feet long multiple arch spans have many challenges technically including: stability of parallel unbraced arches; geometric control of variable depth hexagonal arches 7 to 14 feet deep; thermal movement of 3 sequential arches; critical steel arch base connections into post-tensioned concrete v-piers; use of cable-stay technology to support the superstructure including accommodation of rotation translation; 1800-ton capacity steel pipe piles; complex substructure shapes and water line footings; and impact avoidance of critical utilities including a 108-inch diameter force main. The presentation will discuss the design approach and methodology as well as the role of the bridge architect versus the designer and contractor. Additionally, the erection of the structure will be discussed in light of loads and stresses imparted on the structure during construction. Wind tunnel testing; technical provision security requirements; scour analyses; and a 100-year corrosion protection plan will be highlighted.
Jixing He, PhD, PE, SE
Thank You from Our Sponsors
Michael Baker International, Inc.
The registration fee for the Bridge Symposium is $395 for members ($600 for nonmembers), which includes all 6.5 hours of recorded education.
- Course will award 1.75 hours of continuing education
- This course is Diamond Review approved in 49 states. New York does not accept hours from recordings
Please note: These webinars are not included in the NCSEA Webinar Subscription.