Written in EnglishRead online
|Statement||by A. R. Price and M. A. Fenn.|
|Series||Supplementary reports / Transport and Road Research Laboratory -- 812, Supplementary reports (Transport and Road Research Laboratory) -- 812.|
|Contributions||Fenn, M. A.|
Download Removal and testing of elastomeric bridge bearings
Removal and testing of elastomeric bridge bearings. Crowthorne, Berkshire: Transport and Road Research Laboratory, (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: A R Price; M A Fenn; Transport and Road Research Laboratory.
The present paper focuses on both existing and new R/C bridge overpasses and aims at a) the design and pilot production of elastomeric (steel-laminated) bearings, specifically by a local Hellenic.
Elastomeric bridge bearings have generally performed satisfactorily under current AASHTO and state DOT materials-test methods and requirements.
Nevertheless, there has been concern that bearings are being unnecessarily rejected because of noncom-pliance with testing requirements that may not be essential or appropriate. Although. Find my institution. Log in / Register. 0 CartAuthor: Saleh Ahmadi Soleimani, Dimitrios Konstantinidis, Georgios P.
Balomenos. ELASTOMERIC BRIDGE BEARINGS 1. Material: Elastomeric Bearing Pads 2. Specification: Section 3. Jurisdiction: Product Evaluation Board, Chemical Laboratory 4. Job Acceptance Requirements: A Removal and testing of elastomeric bridge bearings book test report showing actual test results of the lot of elastomer used on the project.
Sample one (1) pad per used at the jobsite and submit. Behaviour of Elastomeric Bearings 51 Types of Elastomeric Bearings 55 Design of Elastomeric Bearings 56 Flow T able of Design 56 Input Data Required 59 Output Expected 59 Manufacture and Quality Control 60 Properties of Elastomer 60 Dimensional Tolerances 60 Inspection and Testing 62 Lot.
On completion every bearing is fully inspected and tagged before release to the despatch area. Testing and Installation Depending on the client’s wishes and budgets, bearings can either be witness tested at test facilities or accredited laboratories. CCL staff will be available to produce test reports and comment on the testing procedure.
the properties required under Section B, ﬁSliding Elastomeric Bearings.ﬂ Bearings represented by test specimens passing the above requirements will be approved for use in the structure subject to on-site inspection by the Engineer for visible defects. Elastomeric bearings have had an exemplary performance record over the past 40 years.
Recently, increased testing requirements have been imposed that now make the testing of elastomeric bearings one of the major costs in constructing the supports. Currently, four low-temperature tests are required for elastomeric bearings.
Elastomeric Bearings General Commentary This section is intended to assist in the design and detailing of elastomeric bridge bearings. The information included is intended to permit efficient fabrication, installation, and maintenance of these bearings.
Elastomeric bearings have a low initial cost when compared to other bearing types, and. ond case study, removal and replacement of nonfunc tioning bearings can be included as part of bridge rehabilitation or seismic retrofit projects.
Replacement bearings include multirotational disc bearings, fabric pads with polytetrafluoroethylene (TFE) and stainless steel sliding surfaces, elastomeric bearings, and lead-core isolation bearings.
specification for plain and laminated elastomeric bridge bearings. 8 bearing testing and acceptance criteria 9 tests 10 keywords annex a (mandatory information) - determining shear modulus standards referencing this book - (show below) - (hide below) astm a /am: specification for steel, sheet and strip, hot-rolled.
Elastomeric Bearings. Elastomeric bearings are commonly used on small to moderate sized bridges. Elastomeric bearings are either fabricated as plain bearing pads (consisting of elastomer only) or as laminated (steel reinforced) bearings (consisting of alternate layers of steel reinforcement and.
Removal and testing of elastomeric bridge bearings book Fixed Elastomeric Bearing Steel Laminated With External Plates (Type E.B.) EB 06/28/ BD-BG3-R1: Expansion Elastomeric Bearing Steel Laminated With External Plates (Type E.B.) EB 06/28/ BD-BG4-R1: Multi-Rotational Bearing Design Guidelines (Type M.R.) EB 06/28/ BD-BG5-R1: Multi-Rotational Bearing (Type M.R.) EB.
The bearings are furnished in four types as follows: plain elastomeric bearing pad; plain elastomeric sandwich bearing; steel-laminated elastomeric bearing; and steel-laminated elastomeric bearing with external load plate. The elastomer for the manufacture of the bearing.
LIST OF FIGURES, 1 1 Elastomeric bridge bearings 2. 1 2 Friction and contact 7, 1 3 Example on h p and hp versions for the pad 9. 2 1 Mapping X from 0 0 to 0c 15, 2 2 Stretching of a unit cube 2 3 The domain and the boundary conditi 2 4 The master element 2 5 The displacement shape functions corner modes 2 6 The displacement.
TRB's National Cooperative Highway Resarch Program (NCHRP) Report Elastomeric Bridge Bearings: Recommended Test Methods examines performancerelated specifications for elastomeric bridge bearings.
The report includes recommended specifications and three new test methods for evaluating essential properties of elastomeric bearings.
ELASTOMERIC LAMINATED BEARING RANGE Design, manufacture and sub-sequent National Association of Testing Authorities (ILAC) MRA cer-tified testing of Granor Elastomeric Bearings is to recognised Australian and international standards.
Granor supplies bearings in accordance with Australian Standard AS from natural rubber (other standards. Freyssinet supplies both mechanical and elastomeric bridge bearings, designed by an in-house design team and manufactured in its factory to the quality standard BS EN ISO Tetron Disc (Pot) bearings Designed and manufactured to EN Elastomeric Bridge Bearings: test values obtained and the required values for the physical properties, heat resistance, and compression Provide a fabricator-developed design that allows future removal with a maximum vertical jacking height of 1/4 in.
after the load is. SECTION 9: Inspection and Evaluation of Bridge Bearings TOPIC Bridge Bearings minimum embedded length. Figure Elements of a Typical Bridge Bearing Not all bearings have all four of these distinct elements.
All bearings do, however, have at least the bearing or bearing surface. Bearing Types and Functionality. Eyre, R., and Stevenson, A. Performance of elastomeric bridge bearings at low temperatures. Third World Congress on Joint Sealing and Bearing Systems for.
which must be transferred from the bridge designer to the bearing designer to permit an economical and adequate design of bearings, as well as their attachments and their testing. Most modern bearings fall into one of two main classifications, namely • Elastomeric, viz laminated elastomeric bearings (LE), plain pads or bearing strips; or.
Elastomeric Bridge Bearing Rubber Pad Testing. “SUBSCRIBE” Don’t forget to Comment, Like and Share, to get more. ***** Song: Fredji - Happy Life (Vlog No Cop. Information for Required Testing. All steel reinforced elastomeric bearings are to be tested in accordance with AASHTO M In order to perform this test the maximum design load for each bearing size and type is required.
Therefore the method (A or B) that was used in design. HLMR) pot and disc style, spherical, seismic isolation and elastomeric bearing assemblies for all types of construction.
D.S. Brown is available to work closely with bridge owners and engineering design consultants to assist in the design, selection and testing of the proper structural bearing assemblies. elastomeric bearings to meet bs, en, as, jis, iso, aashto AND OTHER INTERNATIONAL STANDARDS Bearings thousands of roads, rail and river bridges in all climates in many parts of the world, natural rubber bridge bearings are giving continuous excellent service, demonstrating convincingly their efficiency and durability.
LONG-TERM PERFORMANCE OF ELASTOMERIC BRIDGE BEARINGS. The effects of long-term service on bridge bearings composed of steel plates laminated between elastomeric layers, as placed on twin structures carrying the Route Aurora Expressway over Route 16 and Conrail tracks in New York's Erie County, are summarized.
Get this from a library. An experimental study of elastomeric bridge bearings with design recommendations. [Joseph Vincent Muscarella; J A Yura; Texas.
Department of Transportation. Research and Technology Transfer Office.; University of Texas at Austin. Center for Transportation Research.] -- The purpose of this study was to analyze elastomeric bearing performance on the.
38 interaction of reinforced elastomeric bearings in bridge construction Vol. 24,No. 1, 34 – 40 Fig. 13 Numerical model for the shear modulus test method for bearings 14 and Elastomeric bearing pad replacement at EDL Highway.
Bearing installation must be supervised by an Engineer. INSTALLATION Maintain Stability At all times prior to and during the installation operation, maintain every bridge member in a stable and safe condition. Avoid Damage Carry out installation of bearings without any damage to the bridge member, the bearings, or any other.
Steel Laminated Elastomeric Bridge Bearings () and Elastomeric Bridge Bearings with External Load Plates () The inspection, sampling and testing of elastomeric bridge bearings follows the procedures outlined in Materials Method No.: NY 23 M (to be referred to as MM23), and are performed on a lot by lot basis.
Elastomeric Bridge Bearings Page 3 of 4 QUALITY CONTROL BY THE MANUFACTURER: The Bearing Manufacturer shall submit a Quality Control Plan for the manufacture of elastomeric bearings to the Materials Division for review and approval.
The Plan shall detail the inspection and testing proposed to insure the elastomeric bearings comply with. An elastomeric bridge bearing is a commonly used modern bridge are several different similar types of bridge bearings that include neoprene bearing pads, neoprene bridge bearings, laminated elastomeric bearings and seismic isolators, which are all generally referred to as bridge bearing pads in the construction industry.
They are designed and manufactured based on standards. Current QA/QC procedures are resulting in good quality elastomeric bearings, and relax- ation of the test requirements appears to carry considerable risk without a corresponding price benefit.
Very Large or Unusual Bearings Discussions with design engineers, manufacturers, and state bridge engineers indicate that very large and unusual. For applications where horizontal displacements exceed +/-2 inches(50mm), sliding elastomeric bearing assemblies may provide an economical solution.
The addition of a low-friction sliding surface allows a standard laminated elastomeric bearing device to accommodate unlimited horizontal displacement without increasing the height of the bearing assembly.
The material found progressively more commonly in bridge bearings since is elastomer. The term elastomer is derived from elastic polymer, referencing the characteristic of the material to return to its original shape after load is removed.
The most common elastomers used for bridge bearings are neoprene and natural rubber, with neoprene being the more commonly used in the United States. And the purpose of bridge bearing is to transfer forces from the superstructure to the substructure or reduce the ground vibration to the superstructure.
Generally, according to its different structures, bridge bearing can be divided into elastomeric bearing, pot bearing, spherical bearing and seismic isolation bearing.
Available with bridge. Fig Elastomeric bearing with blockades allowing displacement in one direction only. Modern elastomeric bearings are characterized by enough great bearing capacity (Fig. 4) with plan dimensions reaching Ã— mm and depth of mm, Block et al.
Fig. Modern elastomeric bearings of over 10 MN capacity on bridge support. As part of an overall study of bridge behavior, instrumented elastomeric bearings are being installed on a fully instrumented test bridge in Cincinnati, Ohio.
This paper presents a summary of the completed analysis and testing and the planned laboratory and field testing of the elastomeric bearings.Elastomeric Bridge Bearing Pads Elastomeric Bridge Bearing Pads Suppliers – Company Profile: Deesawala Rubber Industries an ISO certified company takes pleasure in introducing as a leading manufacturer of neoprene Elastomeric bearing pads, strip seal joints,Compression seal joints,Modular joints Pot PTFE bearings and Building joints.
We have some Steel Laminated Elastomeric Bearings to be used on a bridge for both thermal movement and seismic isolation. The testing requirements for the bearings states that each bearing shall be shear tested for a displacement of inches.
The laminated bearings are only inches total thickness.