SIST EN 1337-3:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Structural bearings - Part 3: Elastomeric bearingsAppareils d'appui structuraux - Partie 3: Appareils d'appui en élastomereLager im Bauwesen - Teil 3: Elastomerlager91.010.30Technical aspectsICS:SIST EN 1337-3:2005enTa slovenski standard je istoveten z:EN 1337-3:200501-junij-2005SIST EN 1337-3:2005SLOVENSKI
STANDARD







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1337-3March 2005ICS 91.010.30English versionStructural bearings - Part 3: Elastomeric bearingsAppareils d'appui structuraux - Partie 3: Appareils d'appuien élastomèreLager im Bauwesen - Teil 3: ElastomerlagerThis European Standard was approved by CEN on 4 June 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1337-3:2005: E



EN 1337-3:2005 (E) 2 Contents Foreword.5 1 Scope.6 2 Normative references.6 3 Terms, definitions, symbols and abbreviations.7 3.1 Terms and definitions.7 3.2 Symbols.7 3.2.1 Latin upper case letters.7 3.2.2 Latin lower case letters.9 3.2.3 Greek letters.9 3.2.4 Subscripts.10 3.3 Abbreviations.10 4 Requirements.11 4.1 General.11 4.2 Functional requirements.11 4.3 Performance requirements for complete bearings.11 4.3.1 Shear modulus.11 4.3.2 Shear bond strength.13 4.3.3 Compression stiffness.13 4.3.4 Resistance to repeated loading in compression.15 4.3.5 Static rotation capability.15 4.3.6 Ozone resistance.16 4.3.7 PTFE / elastomer shear bond strength.16 4.4 Material properties.17 4.4.1 General.17 4.4.2 Physical and mechanical properties of elastomer.17 4.4.3 Steel reinforcing plates.18 4.4.4 Sliding surfaces.19 5 Design rules.20 5.1 General.20 5.2 Design values of actions.21 5.3 Laminated bearings.21 5.3.1 Types of laminated bearings.21 5.3.2 Sizes and shapes of laminated bearings.21 5.3.3 Basis of design.24 5.4 Plain pad bearings.31 5.5 Strip bearings.32



EN 1337-3:2005 (E) 3 5.5.1 Geometry.32 5.5.2 Loads.32 5.5.3 Shear strain.33 5.5.4 Stability criteria.33 5.5.5 Deformations and maximum forces exerted on the structure.33 5.6 Sliding elastomeric bearings.33 6 Manufacturing tolerances.33 6.1 Plan size.33 6.2 Thickness of elastomer layers.33 6.2.1 Internal layer.34 6.2.2 External layer on top and bottom surfaces for laminated bearings.34 6.2.3 Tolerances of total thickness of bearing system.34 6.2.4 Edge cover thickness for laminated bearings.35 6.3 Reinforcing steel plate for laminated bearings.35 7 Special requirements.35 7.1 Plinth of the structure - Tolerances of the contact area with the structure.35 7.1.1 General.35 7.1.2 Surface conditions.35 7.1.3 Surface flatness.36 7.1.4 Surface level.36 7.2 Positive means of location.36 7.3 Marking and labelling.36 8 Conformity evaluation.36 8.1 General.36 8.2 Control of the construction product and its manufacture.37 8.2.1 General.37 8.2.2 Initial type tests.37 8.2.3 Routine testing.37 8.2.4 Control of raw materials.37 8.2.5 Audit-testing.38 8.3 Sampling.38 8.3.1 Samples for audit testing.38 8.4 Non-compliance with the technical specification.38 9 Criteria for in-service inspection.41 Annex A (normative)
Elliptical bearings.42 Annex B (normative)
Rotational limitation factor.43 Annex C (normative)
Maximum design strain in laminated bearings.44 Annex D (informative)
Shear modulus comments.45 Annex E (informative)
Typical bearing schedule.46 Annex F (normative)
Shear modulus test method.49 Annex G (normative)
Shear bond test method.53



EN 1337-3:2005 (E) 4 Annex H (normative)
Compression test method.57 Annex I (normative)
Repeated Loading Compression Test Method.61 Annex J (normative)
Eccentric loading test method.64 Annex K (normative)
Restoring Moment Test Method.68 Annex L (normative)
Resistance to ozone test method.71 Annex M (normative)
Shear bond test method for PTFE/elastomer interface.76 Annex N (normative)
Factory production control.80 Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Directive.83 Bibliography.94



EN 1337-3:2005 (E) 5 Foreword This document (EN 1337-3:2005) has been prepared by Technical Committee CEN/TC 167 “Structural bearings”, the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2005, and conflicting national standards shall be withdrawn at the latest by December 2006. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. This European Standard EN 1337: “Structural bearings” consists of the following 11 parts: Part 1
General design rules Part 2
Sliding elements Part 3
Elastomeric bearings Part 4
Roller bearings Part 5
Pot bearings Part 6
Rocker bearings Part 7
Spherical and cylindrical PTFE bearings Part 8
Guide bearings and restrain bearings
Part 9
Protection Part 10 Inspection and maintenance
Part 11
Transport, storage, and installation According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.



EN 1337-3:2005 (E) 6 1 Scope This part of EN 1337 applies to elastomeric bearings with or without complementary bearing devices to extend their field of use such as flat sliding elements covered by EN 1337-2 or sliding surface described in 4.4.4, as used in bridge structures or any other structure with comparable support conditions. This part of EN 1337 applies to elastomeric bearings with dimensions in plan up to (1200 x 1200) mm and does not cover elastomeric bearings made with other elastomers materials than those specified in 4.4.1. It applies to laminated bearings types A, B, C, laminated sliding bearings types E and D, plain pad and strip bearings type F. This part deals with bearings for use in operating temperatures ranging from – 25 °C to + 50 °C and for short periods up to + 70 °C. It is recognised that the air temperature in some regions of Northern Europe is lower than –25 °C. In this case of very low operating temperature (down to – 40 °C), it is essential that bearing characteristics comply also with the shear modulus at very low temperature (see 4.3.1.3. and annex F) 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1337-1:2000, Structural bearings - Part 1: General design rules. EN 1337-2:2004, Structural bearings - Part 2: Sliding elements. prEN 1337-8, Structural bearings - Part 8: Guide bearings and restrain bearings. EN 1337-9:1997, Structural bearings - Part 9: Protection. EN 1337-10; Structural Bearings - Part 10: Inspection and maintenance. EN 1337-11; Structural bearings - Part 11: Transport, storage and installation. EN 10025-1, Hot rolled products of structural steels - Part 1: General technical delivery conditions. EN 10025-2, Hot rolled products of structural steels - Part 2: Technical delivery conditions for non-alloy structural steels ISO 34-1, Rubber, vulcanized or thermoplastic - Determination of tear strength - Part 1: Trouser, angle
and crescent test pieces. ISO 37, Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties. ISO 48, Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 10 IRHD
and 100 IRHD). ISO 188, Rubber, vulcanized or thermoplastic - Accelerated ageing and heat resistance tests. ISO 815, Rubber, vulcanized or thermoplastic - Determination of compression set at ambient, elevated or low temperatures. ISO 1431-1, Rubber, vulcanized or thermoplastic - Resistance to ozone cracking - Part 1: Static strain testing.



EN 1337-3:2005 (E) 7 3 Terms, definitions, symbols and abbreviations 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1337-1:2000 and the following apply. 3.1.1 batch individual mix or blend of mixes of elastomer, when used for bearing production or a number of identical components produced at the same machine setting 3.1.2 elastomer macromolecular material, which returns to approximately its initial dimensions and shape after substantial deformation by a weak stress and release of stress. In this part of the standard it defines the compound that will be used for the production of a rubber part or parts. 3.1.3 elastomeric bearing bearing comprising a block of vulcanised elastomer that may be reinforced with one or more steel plates 3.1.4 laminated bearing elastomeric bearing reinforced internally with one or more steel plates, chemically bonded during vulcanisation 3.1.5 plain pad bearing elastomeric bearing consisting of a solid block of vulcanised elastomer without internal cavities 3.1.6 sliding elastomeric bearing laminated bearing with a PTFE sheet, at top surface, which may be vulcanised directly onto the outer layer of elastomer or fixed to a steel plate, in contact with a sliding plate 3.1.7 sliding plate component which bears on and is immediately adjacent to the top sliding surface of a bearing. It can be: a) a single piece of austenitic steel, b) a thin plate of austenitic steel fixed to a mild steel supporting plate, c) a thin plate of austenitic steel bonded to an elastomeric interlayer which is vulcanised to a mild steel supporting plate. 3.1.8 strip bearing plain pad bearing for which the length is at least ten times the width 3.1.9 top sliding surface polytetrafluoroethylene surface vulcanised on to an elastomeric bearing, in contact with the sliding plate which allows relative translatory displacement 3.2 Symbols For the purposes of this document, the following symbols apply. 3.2.1 Latin upper case letters A Overall plan area of elastomeric bearing .mm²



EN 1337-3:2005 (E) 8 A' Effective plan area of laminated bearing (area of the steel reinforcing plates).mm² Ar Reduced effective plan area of elastomeric bearing .mm² Cc Compressive stiffness of a bearing .N/mm D Overall diameter of circular bearing.mm D' Effective diameter of circular laminated bearing.mm E Modulus of elasticity.MPa Eb Bulk modulus.MPa Ecs Intersecting compression modulus.MPa Ed Design load effects Fxd, Vyd Horizontal design forces.N: kN Fxy Maximum resultant horizontal force obtained by vectorial addition of vx and vy .N: kN Fzd Vertical design force.N: kN G Nominal value of conventional shear modulus of elastomeric bearing.MPa Gdyn Conventional shear modulus of elastomeric bearing under dynamic actions.MPa Ge Shear modulus of elastomer.MPa Gg Conventional shear modulus of elastomeric bearing determined by testing.MPa Kce Factor for strain due to compressive load for elliptical bearing Kde Factor for vertical deflection for load for elliptical bearing Kse Factor for restoring moment for elliptical bearing Kf Friction factor Kh Factor for induced tensile stresses in reinforcing plate KL Type loading factor Km Moment factor Kp
Stress correction factor for the steel reinforcing plates Kr Rotation factor Ks Factor for restoring moment Me Experimental value of restoring moment.N x mm: kN x m
Md Design value of restoring moment.N x mm: kN x m
Rd Design value of resistance



EN 1337-3:2005 (E) 9 Rxy Resultant of the forces resisting to translatory movement S Shape factor S1 Shape factor for the thickest layers Sd Design value of an internal force or moment of a respective vector of several internal
forces or moments To Average total initial thickness of bearing ignoring top and bottom covers.mm
Tb Total nominal thickness of bearing.mm
Tbo Mean total initial thickness of bearing.mm
Te Total nominal thickness of elastomer.mm
Tq
The average total initial thickness of elastomer in shear, including the top and bottom
covers when these are not restrained for shearing.mm
3.2.2 Latin lower case letters a Overall width of bearing (shorter dimension of rectangular bearing).mm ae Minor axis of elliptic bearing a' Effective width of laminated bearing (width of the steel reinforcing plates).mm b Overall length of a bearing (longer dimension of a rectangular bearing).mm be Major axis of elliptical bearing b' Effective length of a laminated bearing (length of the steel reinforcing plates).mm c compression stiffness.N/mm fy Yield stress of steel.N/mm² lp Force free perimeter of elastomeric bearing n Number of elastomer layers t Thickness of plain pad or strip bearing.mm te Effective thickness of elastomer in compression.mm ti Thickness of an individual elastomer layer in a laminated bearing.mm tp Thickness of PTFE sheet.mm ts Thickness of steel reinforcing plate.mm tso Thickness of outer steel reinforcing plate.mm vcd Total vertical deflection.mm vx Maximum horizontal relative displacement in direction of dimension a.mm vy Maximum horizontal relative displacement in direction of dimension b.mm vz Vertical movement/deflection.mm vxy Maximum resultant horizontal relative displacement obtained by vectorial addition
of vx and vy .mm 3.2.3 Greek letters α Angular rotation of a bearing.rad



EN 1337-3:2005 (E) 10 αa Angular rotation across width a of a rectangular bearing.rad αb Angular rotation across length b of a rectangular bearing.rad αab Resultant angular rotation across width a and length b of a rectangular bearing.rad αd Angular rotation across the diameter D of a circular bearing.rad γm Partial safety factor for the resistance δ Vertical deflection of individual elastomer layer.mm Σ Sum of values εα,d Design strain in elastomer slab due to angular rotation εc,d Design strain in elastomer slab due to compressive loads εq,d Design shear strain in elastomer slab due to translatory movements εt,d Total nominal design strain in elastomer slab εz Compressive strain of a bearing µd Design friction coefficient µe Friction coefficient for elastomer σc Compressive stress.MPa σm Average of the compressive stress.MPa σs Tensile stress in steel.MPa τ Shear stress.MPa 3.2.4 Subscripts d Design dyn Dynamic k Characteristic max Maximum min Minimum t Total u At ultimate limit state 3.3 Abbreviations For the purposes of this document, the following abbreviations apply. CR Polychloroprene Rubber NR Natural Rubber pphm Parts per hundred million by volume PTFE Polytetrafluoroethylene SLS Serviceability Limit State ULS Ultimate Limit State



EN 1337-3:2005 (E) 11 4 Requirements 4.1 General The level of quality required for an Elastomeric Bearing is mainly defined in terms of product performance through the limiting values and quantifiable characteristics by reference to complete bearings. The specifications for materials from which the product shall be manufactured complement the essential requirements. To ensure appropriate levels of performance, it is also necessary to refer to the following parts of EN 1337: - part 1 General design rules - part 2 Sliding elements - part 8 Guide bearings and restrain bearings
- part 9 Protection - part 10 Inspection and maintenance - part 11 Transport, storage, and installation 4.2 Functional requirements Elastomeric bearings shall be designed and manufactured to accommodate
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