oSIST prEN 1337-5:2018

Structural bearings - Part 5: Pot bearings

This document specifies rules for the design, testing and manufacture of fixed and sliding pot bearings.
It is applicable to pot bearings:
-   with elastomeric pads made from natural rubber (NR) or chloroprene rubber (CR) up to 1 500 mm diameter,
-   with pot and piston made from ferrous materials,
-   with seals tested for different accumulated slide paths due to rotations between piston and pot of a) 500 m, b) 1 000 m or c) 2 000 m,
-   with seals made from specific austenitic steel, brass, POM or carbon filled PTFE,
-   subjected to operating temperature ranges between -25 °C and +50 °C or -40 °C and +50 °C,
-   subjected to operating temperatures up to +70 °C for repeated periods of less than 8 h.
This document will be used in conjunction with prEN 1337-1:2018 and other relevant parts of the prEN 1337 series.

Lager im Bauwesen - Teil 5: Topflager

Dieses Dokument legt Regeln für die Bemessung, Prüfung und Herstellung von festen und gleitenden Topflagern fest.
Das Dokument gilt für Topflager:
-   mit Elastomerkissen aus Naturgummi (NR) oder Chloroprengummi (CR) mit einem Durchmesser von bis zu 1 500 mm;
-   mit Topf und Deckel aus eisenhaltigen Werkstoffen;
-   mit für verschiedene akkumulierte Gleitwege aufgrund von Verdrehungen zwischen dem Deckel und dem Topf von a) 500 m, b) 1 000 m oder c) 2 000 m geprüften Dichtungen;
-   mit Dichtungen aus speziellem austenitischem Stahl, Messing, POM oder PTFE mit Kohlefüllung;
-   die Betriebstemperaturen zwischen −25 °C und +50 °C oder zwischen −40 °C und +50 °C ausgesetzt sind;
-   die für wiederholte Zeiträume von weniger als 8 h Temperaturen von bis zu +70 °C ausgesetzt sind.
Dieses Dokument wird in Kombination mit prEN 1337-1:2018 und anderen relevanten Teilen der Normenreihe prEN 1337 verwendet.

Appareils d’appui structuraux - Partie 5 : Appareils d’appui à pot

Le présent document spécifie les règles de conception, d’essai et de fabrication d’appareils d’appui à pot fixe et glissant.
Il s’applique aux appareils d’appui à pot :
- dotés de coussins en élastomère en caoutchouc naturel (NR) ou en caoutchouc en chloroprène (CR) jusqu’à 1 500 mm de diamètre,
- dotés d’un pot et d’un piston en matériaux ferreux,
- dotés de joints ayant fait l’objet d’essais sur différentes distances de glissement cumulées en raison des rotations entre le piston et le pot de a) 500 m, b) 1 000 m ou c) 2 000 m,
- dotés de joints en acier austénitique spécifique, laiton, POM ou PTFE renforcé de carbone,
- soumis à des gammes de températures de service comprises entre –25 °C et +50 °C ou –40 °C et +50 °C,
- soumis à des températures de service jusqu’à +70 °C pendant des périodes répétées durant moins de 8 h.
Le présent document sera utilisé conjointement à la norme provisoire prEN 1337-1:2018 et les autres parties pertinentes de la série prEN 1337.

Konstrukcijska ležišča - 5. del: Lončna ležišča

General Information

• Status: Not Published
• Public Enquiry End Date: 29-Mar-2018
• ICS: 91.010.30 - Technical aspects
• Technical Committee: BBB - Concrete, reinforced concrete and prestressed concrete
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 21-Oct-2020
• Due Date: 26-Oct-2020
• Completion Date: 21-Oct-2020
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/104 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on structural bearings
• Ref Project: prEN 1337-5 - Structural bearings - Part 5: Pot bearings

Relations

• Revised: SIST EN 1337-5:2005 - Structural bearings - Part 5: Pot bearings
• Effective Date: 01-Mar-2018
• Revised: SIST EN 1337-5:2005 - Structural bearings - Part 5: Pot bearings
• Effective Date: 18-Jan-2023
• Revised: SIST EN 1337-5:2005 - Structural bearings - Part 5: Pot bearings
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 1337-5:2018
01-marec-2018
.RQVWUXNFLMVNDOHåLãþDGHO/RQþQDOHåLãþD
Structural bearings - Part 5: Pot bearings
Lager im Bauwesen - Teil 5: Topflager
Ta slovenski standard je istoveten z: prEN 1337-5
ICS:
91.010.30 7HKQLþQLYLGLNL Technical aspects
oSIST prEN 1337-5:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 1337-5:2018

---------------------- Page: 2 ----------------------
oSIST prEN 1337-5:2018


DRAFT
EUROPEAN STANDARD
prEN 1337-5
NORME EUROPÉENNE

EUROPÄISCHE NORM

January 2018
ICS 91.010.30 Will supersede EN 1337-5:2005
English Version

Structural bearings - Part 5: Pot bearings
 Lager im Bauwesen - Teil 5: Topflager
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 167.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1337-5:2018 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
oSIST prEN 1337-5:2018
prEN 1337-5:2018 (E)
Contents Page
European 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 . 9
3.3 Abbreviations . 10
4 Types of pot bearings . 10
4.1 General . 10
4.2 Types of pot construction . 11
4.3 Types of internal seal. 12
4.3.1 General . 12
4.3.2 Seals type “a” . 12
4.3.3 Seals type “b” . 13
4.3.4 Seals type “c” . 15
4.4 Types of piston/pot contact surface . 17
5 Material properties . 18
5.1 Ferrous materials . 18
5.2 Elastomeric materials. 18
5.3 Seal materials . 18
5.3.1 Seal type “a” . 18
5.3.2 Seal type “b” . 18
5.3.3 Seal type “c” . 18
5.4 Lubricant . 19
6 Design . 19
6.1 General . 19
6.2 Internal seal system . 19
6.3 Behaviour under vertical load. 19
6.3.1 Contact pressure – elastomeric pad . 19
6.3.2 Deflection . 20
6.4 Behaviour under horizontal load . 20
6.4.1 General . 20
6.4.2 Piston/pot contact pressure . 20
6.4.3 Pot verification . 22
6.5 Behaviour under rotations . 27
6.5.1 General . 27
6.5.2 Restoring moment . 28
6.5.3 Working Life — Working life of seal due to sliding contact with pot wall. 29
6.5.4 Geometric criteria for required rotation . 29
6.6 Combination of vertical loads and rotations — Minimum thickness . 30
6.7 Combination with other bearings or elements . 31
6.7.1 Combination with sliding elements . 31
6.7.2 Load distribution through components . 31
6.7.3 Load transfer to the adjacent structure . 31
2

---------------------- Page: 4 ----------------------
oSIST prEN 1337-5:2018
prEN 1337-5:2018 (E)
7 Testing . 31
7.1 Restoring moment . 31
7.2 Determination of compression stiffness . 31
7.3 Lubricant and rubber . 31
7.4 Surface roughness of steel parts . 32
8 Manufacturing, assembly, tolerances, marking and labelling . 32
8.1 General . 32
8.2 Elastomeric pad . 32
8.3 Parallelism of external surfaces . 32
8.4 Fit of components . 32
8.4.1 Piston in pot . 32
8.4.2 Elastomeric pad in pot . 32
8.5 Surface roughness . 33
8.6 Corrosion protection . 33
8.7 External seal . 33
8.8 Lubrication . 33
8.9 Sharp edges . 33
8.10 Marking and labelling . 33
9 Transport, storage and installation . 33
10 In-service inspection . 33
11 Maintenance . 33
12 Assessment and verification of constancy of performance . 34
12.1 General . 34
12.2 Type Testing . 34
12.3 Factory production control . 34
12.4 Assessment of the performance of the construction product . 34
Annex A (normative) Lubricant elastomer compatibility . 36
A.1 Test pieces . 36
A.1.1 Test pieces made of the elastomer . 36
A.1.2 Test pieces made of the internal sealing . 36
A.1.3 Conditioning of the test pieces . 36
A.2 Test liquid . 36
A.3 Interaction of the lubricant with the elastomer or other components of the pot
bearing . 37
A.3.1 Interaction of the lubricant with the elastomer . 37
A.3.2 Interaction of the lubricant with other components of the pot bearing . 37
A.4 Test Procedure and Details . 37
A.4.1 General . 37
A.4.2 Change of physical properties of elastomer and internal sealing material . 37
A.4.3 Change of mass . 38
A.4.4 Change of hardness . 38
A.4.5 Change of physical properties in tension . 38
A.5 Test report . 38
Annex B (informative) Determination of compression stiffness . 40
B.1 Determination by testing . 40
B.1.1 General . 40
B.1.2 Conditioning . 40
B.1.3 Testing . 40
B.1.4 Analysis of the test . 40
B.2 Determination by calculation. 41
3

---------------------- Page: 5 ----------------------
oSIST prEN 1337-5:2018
prEN 1337-5:2018 (E)
Annex C (normative) Determination of restoring moment . 42
C.1 Introduction . 42
C.2 Preparation of test specimens . 42
C.3 Test procedure . 42
C.4 Evaluation of restoring moment factors . 43
C.5 Test report . 44
Annex D (normative) Test equipment . 46
D.1 Compression testing machine . 46
D.2 Rotation attachment . 46
D.3 Heating equipment (oven) . 47
D.4 Measuring instruments . 47
Annex ZA (informative) Relationship of this European Standard with Regulation (EU)
No. 305/2011 . 48
ZA.1 Scope and relevant characteristics . 48
ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) . 50
ZA.3 Assignment of AVCP tasks . 50
Bibliography . 55

4

---------------------- Page: 6 ----------------------
oSIST prEN 1337-5:2018
prEN 1337-5:2018 (E)
European foreword
This document (prEN 1337-5:2018) has been prepared by Technical Committee CEN/TC 167
“Structural bearings”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1337-5:2005.
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 Regulation 305/2011.
For relationship with EU Regulation 305/2011, see informative Annex ZA, which is an integral part of
this document.
prEN 1337, Structural bearings, consists of the following 8 parts:
— Part 1: General;
— 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 Restraint bearings.
The major technical changes are listed below:
— Complete technical and editorial revision of the document; it is not possible to list all implemented
changes to this edition of EN 1337-5.
5

---------------------- Page: 7 ----------------------
oSIST prEN 1337-5:2018
prEN 1337-5:2018 (E)
1 Scope
This document specifies rules for the design, testing and manufacture of fixed and sliding pot bearings.
It is applicable to pot bearings:
— with elastomeric pads made from natural rubber (NR) or chloroprene rubber (CR) up to 1 500 mm
diameter,
— with pot and piston made from ferrous materials,
— with seals tested for different accumulated slide paths due to rotations between piston and pot of
a) 500 m, b) 1 000 m or c) 2 000 m,
— with seals made from specific austenitic steel, brass, POM or carbon filled PTFE,
— subjected to operating temperature ranges between –25 °C and +50 °C or –40 °C and +50 °C,
— subjected to operating temperatures up to +70 °C for repeated periods of less than 8 h.
This document will be used in conjunction with prEN 1337-1:2018 and other relevant parts of the
prEN 1337 series.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
prEN 1337-1:2018, Structural bearings — Part 1: General
prEN 1337-2:2018, Structural bearings — Part 2: Sliding elements
EN 1991-2, Eurocode 1: Actions on structures — Part 2: Traffic loads on bridges
EN 1993-1-1:2005, Eurocode 3: Design of steel structures — Part 1-1: General rules and rules for
buildings
EN 1993-2:2006, Eurocode 3 — Design of steel structures — Part 2: Steel Bridges
EN 1993 (all parts), Eurocode 3: Design of steel structures
EN 10025 (all parts), Hot rolled products of structural steels
EN 10083-3, Steels for quenching and tempering — Part 3: Technical delivery conditions for alloy steels
EN 10088-2:2014, Stainless steels — Part 2: Technical delivery conditions for sheet/plate and strip of
corrosion resisting steels for general purposes
EN 10113-1, Hot-rolled products in weldable fine grain structural steels — Part 1: General delivery
conditions
EN 10204:2004, Metallic products — Types of inspection documents
EN 12167:2016, Copper and copper alloys — Profiles and bars for general purposes
6

---------------------- Page: 8 ----------------------
oSIST prEN 1337-5:2018
prEN 1337-5:2018 (E)
EN ISO 527-1, Plastics — Determination of tensile properties — Part 1: General principles (ISO 527-1)
EN ISO 527-2, Plastics - Determination of tensile properties — Part 2: Test conditions for moulding and
extrusion plastics (ISO 527-2)
EN ISO 1133 (all parts), Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow
rate (MVR) of thermoplastics (ISO 1133, all parts)
EN ISO 1183 (all parts), Plastics — Methods for determining the density of non-cellular plastics (ISO 1183,
all parts)
EN ISO 2039-1, Plastics — Determination of hardness — Part 1: Ball indentation method (ISO 2039-1)
EN ISO 4287, Geometrical product specifications (GPS) — Surface texture: Profile method — Terms,
definitions and surface texture parameters (ISO 4287)
EN ISO 4288, Geometrical product specifications (GPS) — Surface texture: Profile method — Rules and
procedures for the assessment of surface texture (ISO 4288)
EN ISO 7500-1:2015, Metallic materials — Calibration and verification of static uniaxial testing
machines — Part 1: Tension/compression testing machines — Calibration and verification of the force-
measuring system (ISO 7500-1:2015)
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 1083, Spheroidal graphite cast irons — Classification
ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
ISO 3755, Cast carbon steels for general engineering purposes
ISO 6446, Rubber products — Bridge bearings — Specification for rubber materials
ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test
methods
3 Terms, definitions, symbols and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
7

---------------------- Page: 9 ----------------------
oSIST prEN 1337-5:2018
prEN 1337-5:2018 (E)
3.1.1
accumulated slide path
sum of the relative movements between the internal seal and the pot wall resulting from variable
rotations
3.1.2
elastomeric pad
circular component which provides the rotational capability by deformation
3.1.3
external seal
component or material which is used to exclude moisture and debris from the gap between the piston
and the pot
3.1.4
internal seal
component which prevents escape of the elastomeric material through the gap between the wall of the
pot and the piston when a compressive force is applied
3.1.5
lubricant
special grease used to reduce the friction between the pad and the metallic components for the purpose
of reducing wear and the rotation stiffness
3.1.6
piston
component which closes the open end of the recess in the pot and bears on the elastomeric pad
3.1.7
pot
component with a machined circular recess which contains the elastomeric pad, piston and internal seal
3.1.8
pot bearing
structural bearing consisting of an elastomeric pad (rotational element) confined in a recess by means
of a close fitting piston and an internal seal
Note 1 to entry: The orientation of the bearing is not restricted.
3.1.9
restoring moment
moment generated from the elastomeric pad caused by the rotation deformation
3.1.10
sliding pot bearing
pot bearing combined with a sliding element to accommodate translational movements
3.1.11
slide path
relative movements of internal seal to pot wall
8

---------------------- Page: 10 ----------------------
oSIST prEN 1337-5:2018
prEN 1337-5:2018 (E)
3.2 Symbols
For the purposes of this document, the following symbols apply:
Latin upper case letters
A cross section area 2
mm
d internal diameter of pot mm
int
d outer diameter of pot ring mm
ext
E modulus of elasticity
k factor in restoring moment formula for zero rotation
0
k factor in restoring moment formula for lubricated pad
1
k factor in restoring moment formula for unlubricated pad
2
R resistance of weld 1
w N/mm
V resultant applied horizontal load N
xy
h depth of the cylindrical recess mm
M restoring moment from pad and internal seal in test Nmm
rt;exp
M restoring moment from pad and internal seal Nmm
rt
M additional moment from friction between piston and pot Nmm
fric
M total resistance moment from rotation Nmm
tot;r
N axial force N
r radius of contact surface mm
t thickness of the pot base mm
base
V total transverse or shear force N
1 total transverse or shear force per unit length N
V
tot
V shear force due to elastomer pressure N
el
T temperature
Latin lower case letters
a additional clearance for rotation
b width of piston face mm
b calculated piston/pot contact width mm
cal
c factor used in slide path expression
d diameter of elastomeric pad mm
el
d internal diameter of pot mm
int
d outer diameter of pot ring mm
ext
9

---------------------- Page: 11 ----------------------
oSIST prEN 1337-5:2018
prEN 1337-5:2018 (E)
f ultimate strength of material 2
u N/mm
f yield strength of material 2
y N/mm
f design contact strength of the elastomer 2
el;d N/mm
s accumulated slide path
A,d
t nominal thickness of elastomeric pad mm
el
w Vertical deflection mm
Greek letters
γ partial material factor
m
α rotation angle rad
α resultant rotation angle due to permanent actions rad
g
α resultant rotation angle due to traffic loads rad
Q
α rotation angle in restoring moment test rad
rt
Subscripts
bot lower, bottom
d design, design value
k characteristic
R resistance
fric resulting from friction
rt restoring
top upper
tot total
E internal forces and moments from actions N, Nmm
u ultimate limit state
w weld
el elastomer
3.3 Abbrevia
...