Pot Bearing Replacements--Two Case Studies: Cline Avenue Interchange and I-285/I-85 Interchange

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Title: Pot Bearing Replacements--Two Case Studies: Cline Avenue Interchange and I-285/I-85 Interchange

Author(s): C. Redfield and C. Seim

Publication: Special Publication

Volume: 94

Issue:

Appears on pages(s): 817-824

Keywords: box beams; bridge bearings; frames; jacking; repairs; replacing; structural design; Construction

Date: 7/1/1987

Abstract:
What does an engineer do when a defective pot bearing needs replacing? This particular situation was encountered on two recent construction jobs. Several of the pot bearings on the Cline Avenue Project in East Chicago, Ind., needed to be replaced because the elastomer was extruding from the pot. On the I-285 project in Atlanta, Ga., six pot bearings were misaligned and had to be readjusted. The superstructure on both projects was cast in place prestressed concrete box girders. The performance of replacing the pot bearings required designing, fabricating, and installing temporary steel frames, performing special jacking operations, and removing and replacing the pot bearings. This paper describes the operation for both projects in hopes that the solutions illustrated herein may be used by others to help solve similar problems.