San Francisco, CA
The new tower links Terminal 1 with Terminal 2 in a cutting-edge facility for air traffic controllers and FAA staff. The project involved the preparation of the conceptual design and design-build bridging documents for the replacement tower. R+C was responsible for the development of the project-specific seismic design criteria, which required close collaboration with SFO and FAA stakeholders since the design involved a non-prescriptive (performance-based) approach intended to provide Immediate Occupancy in the Design Basis EQ. R+C performed nonlinear response history analysis to develop the innovative structural concept, which includes unbonded vertical post-tensioning in a concrete core—this allows the tower to re-center itself, reducing residual post-earthquake displacement.
R+C provided structural and geotechnical engineering services related to the seismic design of the new tower and also provided peer review services to the design-build team.
Vertical post-tensioning in concrete core to re-center tower
Soil-structure interaction study to predict behavior on unique site
Vertical post-tensioning in concrete core to re-center tower
Leavening peerless structural engineering skill with humor, philosophy, people skills and, above all, a consummate understanding of San Francisco's permitting process, [Alan] saw this project through.
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