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Bridge Bearings
The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
D G Manning – 1st expert on this subject based on the ideXlab platform
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friction in Bridge Bearings with contaminated tfe slide surface
Journal of Structural Engineering-asce, 1993Co-Authors: T I Campbell, M J Fatemi, D G ManningAbstract:Tetrafluoroethylene (TFE) is commonly used as a slide surface mating with polished stainless steel in Bridge Bearings that accommodate translation and rotation of the superstructure relative to the substructure. The primary requirement of the slide surface is a low coefficient of friction that is maintained throughout the service life of the bearing. The paper reports on a laboratory investigation comprising 14 tests undertaken at room temperature under simulated field conditions that was performed to determine the effect of contamination on the coefficient of friction in a lubricated TFE/stainless steel interface. It is shown that the friction of a lubricated surface increases significantly with a relatively low amount of contamination in the form of unhydrated portland cement in the interface, emphasizing the need for assembling Bearings in a dust-free environment and avoiding disassembling of Bearings on site. The influences of the degree of contamination on the coefficient of friction at initial movement and after 200 cycles of movement, as well as on the peak value of the coefficient of friction recorded during a test, are discussed.
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MOVEMENTS IN Bridge Bearings
, 1990Co-Authors: T Masliwec, D G ManningAbstract:The paper reports the results of a program to identify suitable equipment and to measure, under service conditions, the displacements and velocities of Bridge Bearings incorporating TFE stainless steel slide surface.
John L Tassoulas – 2nd expert on this subject based on the ideXlab platform
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behavior of elastomeric Bridge Bearings computational results
Journal of Bridge Engineering, 1998Co-Authors: O Hamzeh, John L Tassoulas, Eric B BeckerAbstract:A p-version, two-dimensional (2D) finite-element model incorporating both material and geometric nonlinearities and a consistent frictional contact algorithm is utilized to analyze elastomeric Bridge Bearings. Stresses and strains are examined and factors affecting them are discussed. In particular, tapered Bearings, used to support inclined girders, are analyzed. The shear stiffness of both flat and tapered pads is investigated. It is shown that deforming a tapered pad vertically results in a horizontal reaction that should be considered for proper bearing design. Comparisons with some recent experimental findings are shown.
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model for viscous walking of elastomeric Bridge Bearings
Journal of Engineering Mechanics-asce, 1998Co-Authors: O Hamzeh, Eric B Becker, John L TassoulasAbstract:Elastomeric Bridge Bearings have been occasionally observed to move out of their original position. A simple model for this gradual displacement, also known as walking, is developed. The model, through a regularized Coulomb law, incorporates viscous frictional interfaces between the bearing and the girder, abutment, or pier. It is concluded that viscous interfaces, introduced by a layer of wax, are the main factor causing the walking of pads.
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MODEL FOR VISCOUS “WALKING” OF ELASTOMERIC Bridge Bearings. TECHNICAL NOTE
Journal of Engineering Mechanics-asce, 1998Co-Authors: O Hamzeh, Eric B Becker, John L TassoulasAbstract:Elastomeric Bridge Bearings have been occasionally observed to move out of their original position. A simple model for this gradual displacement, also known as “walking,” is developed. The model, through a regularized Coulomb law, incorporates viscous frictional interfaces between the bearing and the girder, abutment, or pier. It is concluded that viscous interfaces, introduced by a layer of wax, are the main factor causing the “walking” of pads.
O Hamzeh – 3rd expert on this subject based on the ideXlab platform
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behavior of elastomeric Bridge Bearings computational results
Journal of Bridge Engineering, 1998Co-Authors: O Hamzeh, John L Tassoulas, Eric B BeckerAbstract:A p-version, two-dimensional (2D) finite-element model incorporating both material and geometric nonlinearities and a consistent frictional contact algorithm is utilized to analyze elastomeric Bridge Bearings. Stresses and strains are examined and factors affecting them are discussed. In particular, tapered Bearings, used to support inclined girders, are analyzed. The shear stiffness of both flat and tapered pads is investigated. It is shown that deforming a tapered pad vertically results in a horizontal reaction that should be considered for proper bearing design. Comparisons with some recent experimental findings are shown.
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model for viscous walking of elastomeric Bridge Bearings
Journal of Engineering Mechanics-asce, 1998Co-Authors: O Hamzeh, Eric B Becker, John L TassoulasAbstract:Elastomeric Bridge Bearings have been occasionally observed to move out of their original position. A simple model for this gradual displacement, also known as walking, is developed. The model, through a regularized Coulomb law, incorporates viscous frictional interfaces between the bearing and the girder, abutment, or pier. It is concluded that viscous interfaces, introduced by a layer of wax, are the main factor causing the walking of pads.
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MODEL FOR VISCOUS “WALKING” OF ELASTOMERIC Bridge Bearings. TECHNICAL NOTE
Journal of Engineering Mechanics-asce, 1998Co-Authors: O Hamzeh, Eric B Becker, John L TassoulasAbstract:Elastomeric Bridge Bearings have been occasionally observed to move out of their original position. A simple model for this gradual displacement, also known as “walking,” is developed. The model, through a regularized Coulomb law, incorporates viscous frictional interfaces between the bearing and the girder, abutment, or pier. It is concluded that viscous interfaces, introduced by a layer of wax, are the main factor causing the “walking” of pads.