Title: New Bearings for Washington Metro
Author(s): J. Valvezan, D. Gilstad, and F. Farhangi
Publication: Symposium Paper
Appears on pages(s): 299-308
Keywords: bearings; box beams; bridges (structures); girders; subways; Construction
After 18 years of service, the pot bearings of the New Carrolton Route Section D-10, part of the Washington, D. C. Metropolitan Area Transit Authority's metro system, are being replaced. Access to the bearings is extremely limited because the bearings are architecturally sealed behind cover plates within box girders. This paper highlights the need to design bridges with access for maintenance, inspection, and bearing replacement. It also discusses issues relating to the long term performance of bearings.