New Bearings for Washington Metro

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Title: New Bearings for Washington Metro

Author(s): J. Valvezan, D. Gilstad, and F. Farhangi

Publication: Special Publication

Volume: 164

Issue:

Appears on pages(s): 299-308

Keywords: bearings; box beams; bridges (structures); girders; subways; Construction

Date: 11/1/1996

Abstract:
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.