Railway applications - Track - Test methods for fastening systems - Part 4: Effect of repeated loading

This document specifies a laboratory test procedure for applying repeated displacement cycles representative of the displacements caused by traffic on railway track. It is used for assessing the long term performance of direct fastening systems.
The procedure is applicable to surface mounted rail on sleepers, bearers and slab track, and embedded rail.
This test procedure applies to a complete fastening assembly.

Bahnanwendungen - Oberbau - Prüfverfahren für Schienenbefestigungssysteme - Teil 4: Dauerschwingversuch

Dieses Dokument legt ein Laborprüfverfahren zur Aufbringung wiederkehrender Verformungszyklen fest, die Verformungen repräsentieren, wie sie vom Verkehr auf Eisenbahngleisen verursacht werden. Es wird zur Bewertung des Langzeitverhaltens direkter Befestigungssysteme verwendet.
Die Verfahren sind für kraftschlüssig verbundene Schienen auf Gleisschwellen, Weichenschwellen und schotterlosen Gleisen sowie für eingebettete Schienen anwendbar.
Dieses Prüfverfahren gilt für ein komplettes Schienenbefestigungssystem.

Applications ferroviaires - Voie - Méthodes d'essai pour les systèmes de fixation - Partie 4 : Effets produits par des charges répétitives

Le présent document spécifie une méthode d'essai en laboratoire pour l'application de cycles répétitifs de déplacements provoqués par la circulation sur une voie ferrée. Cette méthode est utilisée pour estimer les performances à long terme des systèmes de fixation directs.
Elle est applicable aux rails montés en surface sur des traverses, des supports, des voies sans ballast et rail enrobé.
Ce mode opératoire d'essai s'applique à un système de fixation complet.

Železniške naprave - Zgornji ustroj proge - Preskušanje pritrdilnih sistemov - 4. del: Učinek ponavljajoče se obremenitve

General Information

Status
Published
Public Enquiry End Date
14-Nov-2018
Publication Date
14-May-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
12-May-2020
Due Date
17-Jul-2020
Completion Date
15-May-2020

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SLOVENSKI STANDARD
SIST EN 13146-4:2020
01-julij-2020
Nadomešča:
SIST EN 13146-4:2012+A1:2015

Železniške naprave - Zgornji ustroj proge - Preskušanje pritrdilnih sistemov - 4.

del: Učinek ponavljajoče se obremenitve

Railway applications - Track - Test methods for fastening systems - Part 4: Effect of

repeated loading

Bahnanwendungen - Oberbau - Prüfverfahren für Schienenbefestigungssysteme - Teil 4:

Dauerschwingversuch

Applications ferroviaires - Voie - Méthodes d'essai pour les systèmes de fixation - Partie

4 : Effets produits par des charges répétitives
Ta slovenski standard je istoveten z: EN 13146-4:2020
ICS:
93.100 Gradnja železnic Construction of railways
SIST EN 13146-4:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 13146-4:2020
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SIST EN 13146-4:2020
EN 13146-4
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2020
EUROPÄISCHE NORM
ICS 93.100 Supersedes EN 13146-4:2012+A1:2014
English Version
Railway applications - Track - Test methods for fastening
systems - Part 4: Effect of repeated loading

Applications ferroviaires - Voie - Méthodes d'essai Bahnanwendungen - Oberbau - Prüfverfahren für

pour les systèmes de fixation - Partie 4 : Effets produits Schienenbefestigungssysteme - Teil 4:

par des charges répétitives Dauerschwingversuch
This European Standard was approved by CEN on 24 February 2020.

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. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13146-4:2020 E

worldwide for CEN national Members.
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SIST EN 13146-4:2020
EN 13146-4:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms, definitions, symbols and abbreviations ................................................................................... 5

3.1 Terms and definitions ................................................................................................................................... 5

3.2 Symbols and abbreviations ......................................................................................................................... 6

4 Principle ............................................................................................................................................................. 7

5 Apparatus ........................................................................................................................................................... 7

5.1 Rail ........................................................................................................................................................................ 7

5.2 Actuator .............................................................................................................................................................. 7

5.3 Load application head ................................................................................................................................... 7

5.4 Displacement-measuring instruments.................................................................................................... 7

5.4.1 Calibration procedure ................................................................................................................................... 7

5.4.2 Calibration requirement .............................................................................................................................. 7

5.4.3 Fixtures for mounting displacement-measuring instruments ....................................................... 8

5.5 Force-measuring instruments .................................................................................................................... 8

5.6 Verification of calibration ............................................................................................................................ 8

6 Test specimens ................................................................................................................................................. 8

6.1 Sleeper or other rail support ...................................................................................................................... 8

6.2 Fastening ............................................................................................................................................................ 8

7 Procedure for one rail ................................................................................................................................... 8

7.1 General ................................................................................................................................................................ 8

7.2 Preparation for test ........................................................................................................................................ 9

7.2.1 In line fastening ............................................................................................................................................... 9

7.2.2 Offset fastening ................................................................................................................................................ 9

7.3 Clamping force ................................................................................................................................................. 9

7.4 Longitudinal rail restraint ........................................................................................................................ 10

7.5 Vertical stiffness of fastening assembly ............................................................................................... 10

7.5.1 Static stiffness ................................................................................................................................................ 10

7.5.2 Low-frequency dynamic stiffness ........................................................................................................... 10

7.6 Cyclic loading ................................................................................................................................................. 10

7.6.1 Preparation for the cyclic load test........................................................................................................ 10

7.6.2 Preliminary load cycles .............................................................................................................................. 11

7.6.3 Continuation of the repeated load test ................................................................................................. 11

7.6.4 Results required from the repeated load test .................................................................................... 11

7.7 Repeat tests .................................................................................................................................................... 15

7.8 Final inspection ............................................................................................................................................ 15

8 Alternative test procedure ....................................................................................................................... 15

8.1 General ............................................................................................................................................................. 15

8.2 Apparatus ........................................................................................................................................................ 15

8.2.1 General ............................................................................................................................................................. 15

8.2.2 Loading frame ................................................................................................................................................ 15

8.3 Procedure........................................................................................................................................................ 16

8.3.1 General ............................................................................................................................................................. 16

8.3.2 Preparation for test ..................................................................................................................................... 16

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SIST EN 13146-4:2020
EN 13146-4:2020 (E)

8.3.3 Clamping force ............................................................................................................................................... 16

8.3.4 Longitudinal rail restraint ......................................................................................................................... 17

8.3.5 Vertical stiffness ............................................................................................................................................ 17

8.3.6 Cyclic loading.................................................................................................................................................. 17

8.3.7 Repeat tests ..................................................................................................................................................... 17

8.3.8 Final inspection ............................................................................................................................................. 17

9 Test report ...................................................................................................................................................... 18

Bibliography ................................................................................................................................................................. 19

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SIST EN 13146-4:2020
EN 13146-4:2020 (E)
European foreword

This document (EN 13146-4:2020) has been prepared by Technical Committee CEN/TC 256 “Railway

applications”, the secretariat of which is held by DIN.

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 October 2020, and conflicting national standards shall

be withdrawn at the latest by October 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 13146-4:2012+A1:2014.

In this revision of EN 13146-4:2012+A1:2014, the procedure has been modified to clarify the detail of

some of the test procedures.

This document is one of the series EN 13146, Railway applications — Track — Test methods for

fastening systems, which consists of the following parts:
— Part 1: Determination of longitudinal rail restraint;
— Part 2: Determination of torsional resistance;
— Part 3: Determination of attenuation of impact loads;
— Part 4: Effect of repeated loading;
— Part 5: Determination of electrical resistance;
— Part 6: Effect of severe environmental conditions;
— Part 7: Determination of clamping force and uplift stiffness;
— Part 8: In-service testing;
— Part 9: Determination of stiffness;
— Part 10: Proof load test for pull-out resistance.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
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SIST EN 13146-4:2020
EN 13146-4:2020 (E)
1 Scope

This document specifies a laboratory test procedure for applying repeated displacement cycles

representative of the displacements caused by traffic on railway track. It is used for assessing the long

term performance of fastening systems.

The procedure is applicable to surface mounted rail on sleepers, bearers and slab track, and embedded

rail.
This test procedure applies to a complete fastening assembly.
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.

EN 13146-1, Railway applications — Track — Test methods for fastening systems — Part 1:

Determination of longitudinal rail restraint

EN 13146-7, Railway applications — Track — Test methods for fastening systems — Part 7:

Determination of clamping force and uplift stiffness

EN 13146-9:2020, Railway applications — Track — Test methods for fastening systems — Part 9:

Determination of stiffness

EN 13481-1:2012, Railway applications — Track — Performance requirements for fastening systems —

Part 1: Definitions

EN ISO 7500-1:2018, 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 7500-1:2018)

EN ISO 9513:2012, Metallic materials — Calibration of extensometer systems used in uniaxial testing (ISO

9513:2012)
3 Terms, definitions, symbols and abbreviations
3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 13481-1:2012 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 https://www.iso.org/obp/ui
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SIST EN 13146-4:2020
EN 13146-4:2020 (E)
3.2 Symbols and abbreviations
For the purposes of this document, the following symbols apply.

α angle between the load line and a line normal to the running surface of the rails, in degrees;

F maximum axial longitudinal load on the rail without non-elastic displacement occurring, in kN;

F force applied to assembly in measurement of static stiffness of assembly, in kN;

SAmax
P component of force parallel to the running surface of the rails, in kN;
P component of force normal to the running surface of the rails, in kN;

X position of the line of application of P below the centre of curvature of the gauge corner of the

rail head as shown in Figure 1, in mm.
= tanα
NOTE 1
NOTE 2 Running surface is defined in EN 13481-1:2012.
Key
1 Centre of gauge corner radius
2 Centre line of rail profile
3 Line of load application
Figure 1 — Position of load application
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SIST EN 13146-4:2020
EN 13146-4:2020 (E)
4 Principle

A constant amplitude, cyclic force is applied by a single actuator at a predetermined load line and

position on the rail head. The load, position and line of application to be used are determined from the

vertical stiffness of the fastening assembly, axle loads and curve conditions of the track for which the

fastening assembly is being tested.

Performance is determined by the change in clamping force, longitudinal rail restraint, vertical stiffness

and rail position, and visual inspection of the components during test.
5 Apparatus
5.1 Rail

Short lengths of rail (approximately 0,5 m per rail seat or longer if required), of the section for which

the fastening assembly under test is designed. The rail shall be unlaminated and neither have loose rust

on the surface nor be polished on the foot by repeated testing.

The head of the rail may be modified to accommodate the load application head except when testing

fastenings which support the web of the rail. In this case, the dimension X, as shown in Figure 1, refers

to the design rail section for the fastening assembly.

For embedded rail, the rail is part of the test specimen and its length is specified in 6.1.

5.2 Actuator

Actuator capable of applying a force of up to 150 kN in a cyclic manner at a frequency of (4 ± 1) Hz.

NOTE For simultaneous loading of two and four rail seats the required capacity will be correspondingly

greater.
5.3 Load application head

A head in contact with the rail which is capable of transmitting the applied force to a rail at the required

position relative to the rail head.
5.4 Displacement-measuring instruments
5.4.1 Calibration procedure

If contacting displacement-measuring instruments are used they shall conform to EN ISO 9513:2012,

Table 2, Class 2.

If non-contacting displacement-measuring instruments are used they shall be calibrated to ensure that

they are capable of measuring the displacement of the rail, relative to the supporting sleeper or other

element as required in 5.4.2.
5.4.2 Calibration requirement
The instrument shall be capable of measuring displacements as follows:

— for assemblies with an expected low-frequency dynamic stiffness ≤ 100 MN/m, displacement-

measurement within ± 0,02 mm;
— for assemblies with an expected low-frequency dynamic stiffness
...

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