Unknown Facts About Bridge Bearings - an overview - ScienceDirect Topics

Memorandum All Design Area Personnel J. Kapur August 16, 2002 Bridge Bearing Replacement Provisions This style memo is intended to clarify the intent of Section 8. 4.3. C. 6 of the Bridge Style Handbook. All bridge bearings aside from steel strengthened elastomeric bearings shall usually be created and detailed to accommodate the setup and operation of hydraulic jacks to facilitate bearing replacement.

Some concerns have actually arisen relating to the requirement to accommodate elastomeric bearing replacement at prestressed concrete girder bridge abutments. End type "A" girders (having important end diaphragms) need not be detailed to accommodate elastomeric bearing replacement.  Keep Checking Back Here  "B" girders (having L-type abutments) shall be designed and detailed to accommodate elastomeric bearing replacement.

The standard end diaphragms for long span girders might not have adequate flexural and shear capability for the jacking operations. The designer shall inspect these and provide sufficient steel reinforcement to accommodate shear forces and minutes caused by jacking operations (Girder end types "A" and "B" are portrayed on BDM sheets 6.

Forth Road Bridge Bearing Replacement – Millar Callaghan Engineering  Services Ltd

The Facts About FHWA Bridge Inspection Manual Section 9 - Bridge Bearings Revealed

2-A1-6). By the way, intermediate piers having steel strengthened elastomeric bearings will also be developed and detailed to facilitate bearing replacement. Background Girder end type "A" corresponds to bridges having important end diaphragms over abutments. These structures are fairly short (less then 400 feet). Subsequently, the elastomeric bearings undergo smaller longitudinal shear distortions and rotations.

Girder end type "B" corresponds to bridges having L-type abutments. These structures are usually longer that 400 feet or have large alter angles. As a result, they go through bigger longitudinal shear deformations and rotations. The likelihood of these bearings slipping out and needing resetting or replacement is higher. Basic modifications having very little financial effect can be made to girder stops and/or end diaphragms to assist in hydraulic jack installation and bearing replacement.

JK Prestressingco

Heavy Duty Jacking Equipment for bridge bearing replacement - FPT

Freyssinet uses a range of jacking methods, consisting of applications which overcome concerns in both brand-new building and construction and existing structures or structures. Jacks can be operated vertically to raise structures but likewise horizontally to move them. Freyssinet's capabilities consist of bridge lifting and sliding, bearing replacement, high strength bar tensioning, load transfer, pre-stressing, control of settlement and compensation jacking, force measurement, and weighing.