New San Francisco Oakland Bay Bridge – South Detour East Tie-In Structure Design and Construction Support Services - San Francisco, CA
The Bay Bridge South-South Detour structure consists of a 1/3 mile long temporary detour from the Yerba Buena Tunnel to the existing east span of the Bay Bridge. The East Tie-In structure consists of a new 80-meter single span double deck truss and a skid bent system. The 2009 Labor Day weekend roll-out-roll-in process, transferring 10 lanes of Bay Bridge traffic to the South-South Detour structure, involved removal of the YB4 span and installation of the new ETI span on top of skid bent. AMC was responsible for the dynamic, static pushover, and construction sequence analyses of all impacted existing and new structural systems. AMC performed STAGE analysis to simulate the roll-out and roll-in procedures. AMC performed studies to derive a unique decking system to preventing deck cracking as the new span’s supporting condition changes. AMC assisted in the design of the composite decking, stringers, floor beams, and transition structural components between new and existing structures. During construction phase, AMC was involved in shop drawing review, review and response of RFIs, review and response of contractor’s submittals, and document controls.
- Dynamic structural analyses
- Static pushover analyses
- Construction stage sequence analyses
- Development and design of decking system
- Shop drawing review
- Contractor’s submittal review