1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Road traffic noise reducing devices Non-acoustic performancePart 1: Mechanical performance and stability requirementsBS EN 17941:2018National forewordThis British Standard is the UK implementation of EN 17941:2018. It s
2、upersedes BS EN 17941:2011, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/509/6, Fences for the attenuation of noise.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport
3、 to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 94069 9ICS 93.080.30Compliance with a British Standard cannot confer immunity from legal obligations
4、.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 17941:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1794-1February 2018ICS 93.080.30
5、Supersedes EN 17941:2011EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN 17941:2018: EAll rights of exploitation in any form and by any means reserved worldwide for
6、CEN national MembersRoad traffic noise reducing devices Nonacoustic performance Part 1: Mechanical performance and stability requirementsDispositifs de rduction du bruit du trafic routier Performances non acoustiques Partie 1 : Performances mcaniques et exigences en matire de stabilitLrmschutzvorric
7、htungen an Straen Nichtakustische Eigenschaften Teil 1: Mechanische Eigenschaften und Anforderungen an die StandsicherheitThis European Standard was approved by CEN on 13 November 2017.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving
8、 this European Standard the status of a national standard without any alteration. Uptodate lists and bibliographical references concerning such national standards may be obtained on application to the CENCENELEC Management Centre or to any CEN member.This European Standard exists in three official v
9、ersions (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 Austri
10、a, 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,
11、 Sweden, Switzerland, Turkey and United Kingdom.English VersionEN 1794-1:2018 (E)European foreword 3Introduction . 41 Scope . 52 Normative references 53 Terms and definitions . 54 Symbols and abbreviations . 65 Performances . 75.1 General . 75.2 Wind load and load due to passing vehicles 75.3 Selfwe
12、ight 75.4 Impact of stones . 85.5 Safety in collision 85.6 Dynamic actions from snow clearance: equivalent static load 86 Test report .8Annex A (normative) Resistance against wind load and load from passing vehicles .10Annex B (normative) Self-weight 18Annex C (normative) Impact of stones 21Annex D
13、(informative) Safety in collision .24Annex E (normative) Substitute load due to dynamic actions from snow clearance 25Bibliography .282Contents PageBS EN 17941:2018EN 1794-1:2018 (E)European forewordThis document (EN 1794-1:2018) has been prepared by Technical Committee CEN /TC 226 “Road equipment“,
14、 the secretariat of which is held by AFNOR.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 August 2018, and conflicting national standards shall be withdrawn at the latest by August 2018.Attention
15、 is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights.This document supersedes EN 17941:2011.The main change compared to the previous edition concerns
16、: the Annex A, i.e.: the way to consider the resistance of the Noise Reducing Devices (NRD) to loads. The first version of this standard was written before the Eurocodes were published and, then, was specifying performances. This revised version of the standard now only states the methods of assessm
17、ent of the maximum load the NRD can withstand without damage. Essentially the manufacturer now has the responsibility to declare the maximum load guarantee representative of its product performances, and to demonstrate those performances. On the other hand, facing previous problems with wrongly calc
18、ulated performances of some acoustic elements, this new version of the standard requires that the assessment of the performances is now done mainly by testing. the Annex D: the acceptance criteria given in the previous version of this standard have been deleted and this revised version of the standa
19、rd now only refers to EN 13171 and EN 13172.This European Standard consists of the following parts under the general title “Road traffic noise reducing devices Non-acoustic performance“: Part 1: Mechanical performance and stability requirements Part 2: General safety and environmental requirements P
20、art 3: Reaction to fire Burning behaviour of noise reducing devices and classificationAccording to the CENCENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Re
21、public, 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 the United Kin
22、gdom.3BS EN 17941:2018EN 1794-1:2018 (E)IntroductionWhile performing their primary function, road traffic noise reducing devices are exposed to a range of forces due to wind, dynamic air pressure caused by passing traffic, and the self-weight of its component parts. They can also be subjected to sho
23、cks caused by stones or other debris thrown up by vehicle tyres and, in some countries, the dynamic force of snow ejected by equipment used to clear roads in winter. The deflections of a noise reducing device under such loads during its design life should not reduce its effectiveness.4BS EN 17941:20
24、18EN 1794-1:2018 (E)1 ScopeThis European Standard specifies criteria to categorize road traffic noise reducing devices according to basic mechanical performance under standard conditions of exposure, irrespective of the materials used. A range of conditions and optional requirements is provided in o
25、rder to take into account the wide diversity of practice in Europe. Individual aspects of performance are covered separately in the annexes. Safety considerations in the event of damage to noise reducing devices are covered in EN 17942.This European Standard covers the current behaviour of the produ
26、ct. In order to assess its long term performances, EN 143892 should be used.NOTE The test procedure described in Annex A doesnt consider the fatigue effect.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requiremen
27、ts 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 13171, Road restraint systems Part 1: Terminology and general criteria for test methodsEN 13172, Road restraint syste
28、ms Part 2: Performance classes, impact test acceptance criteria and test methods for safety barriers including vehicle parapetsEN 1990, Eurocode Basis of structural design3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintain terminol
29、ogical 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/obp3.1noise reducing deviceNRDdevice that is designed to reduce the propagation of traffic noise away from t
30、he road environmentNote 1 to entry: This may be a noise barrier, cladding, a road cover or an added device. These devices may include both acoustic and structural elements.3.2noise barriernoise reducing device, which obstructs the direct transmission of airborne sound emanating from road traffic3.3a
31、coustic elementelement whose primary function is to provide the acoustic performance of the device3.4structural elementelement whose primary function is to support or hold in place acoustic elements5BS EN 17941:2018EN 1794-1:2018 (E)3.5claddingnoisereducing device, which is attached to a wall or oth
32、er structure and reduces the amount of sound reflected3.6covernoisereducing device, which either spans or overhangs the road3.7added deviceadditional component that influences the acoustic performance of the original noise-reducing device (acting primarily on the diffracted energy)3.8mechanical test
33、 apparatusdevice of the type used for measuring the elasticity of hard surfaces3.9test areacentral area of a full size panel enclosed by a margin of 125 mm from each edgeNote 1 to entry: As shown in Figure C.2.3.10vehicle occupants safe devicetraffic safe noise reducing device for which a vehicle im
34、pact does not cause more danger to the occupants than allowed for safety barriers in EN 131723.11combined safety and noise barriertraffic safe noise reducing device which fulfils all the requirements for safety barriers in a given containment class as defined in EN 1317-23.12dynamic actions from sno
35、w clearance: equivalent static loadload due to snow thrown against a noise reducing device by snow ploughing equipment3.13ploughing speedspeed of the snow ploughing equipment as it passes the noise barrier3.14non-vertical noise barriernoise barrier or a part of it (e.g. cantilever) which has a verti
36、cal inclination more than 153.15maximum loadmaximum load (in kN/m2) that the sample can withstand with fulfilment of specified criteria4 Symbols and abbreviationsFor the purposes of this document, the following symbols and abbreviations apply.h total height of the noise barrier, in millimetresL leng
37、th of elements, in millimetresLSbearing length of structural element, in millimetres6 BS EN 17941:2018EN 1794-1:2018 (E)LAlength of acoustic element, in millimetresFsafemaximum load the element can withstand, declared by the manufacturer and tested, in kN/m2Fd50load that corresponds to a deflection
38、of 50 mm, in kN/m2FpermanentLA/500load that corresponds to a permanent deflection of LA/500, in kN/m2d deflection, in millimetresdhmaxhorizontal maximum deflection, in millimetresdvmaxvertical maximum deflection, in millimetresdselfweightdeflection of the sample in horizontal position under its own
39、weightdsafedeflection after having applied the Fsafeloaddpermanentpermanent deflection after charged50deflection of 50 mmGpartial factor for permanent actions, also accounting for model uncertainties and dimensional variationsFpartial factor for actions, also accounting for model uncertainties and d
40、imensional variations load factorSF safety factor5 Performances5.1 GeneralUnder any of the loads specified in this Clause 5, elements shall not become detached from their supports or fixings may not fail.The influence of inhomogeneity shall be considered in the relevant verifications according to th
41、e specific Eurocodes if existing.All failure modes and deformation which may cause transient or permanent disorders should be considered. These modes can affect the overall behaviour of the structure or the behaviour of some elements.5.2 Wind load and load due to passing vehiclesThe manufacturer sha
42、ll provide the result of the assessments done according the methods described in Annex A.5.3 Self-weightThe manufacturer shall provide the dry and wet (or reduced wet) weight according to Annex B.The manufacturer shall provide the vertical load the product can withstand under the selfweight, as calc
43、ulated or tested in Annex B, in respect of the requirements specified in Annex B.7BS EN 17941:2018EN 1794-1:2018 (E)5.4 Impact of stonesDamage caused by controlled impacts shall not exceed the criteria specified in Annex C.5.5 Safety in collisionWhen the functions of noise barrier and safety barrier
44、 are integrated in one system, the safety in collision shall be assessed in accordance with EN 13171 and EN 13172. See also informative Annex D.5.6 Dynamic actions from snow clearance: equivalent static loadThe effects of dynamic forces from snow clearance shall be assessed in accordance with Annex
45、E, where required or specified.6 Test reportA test report shall be produced containing the aspects of performance and shall include the following information:a) number and year of this European Standard, i.e. EN 1794-1:2018;b) full description of the test specimen including manufacturers name and pr
46、oduct identifier with sectional drawings and photographs showing mounting conditions; masses, densities, dimensions and specifications of panels, posts and seals, including any internal components;c) description of the method of sampling, if parts of manufactured elements are evaluated by testing;d)
47、 place and date of the assessment, and the name of the assessor;e) sufficient description of any tests carried out, any results measured and the conclusions drawn about the product together with any illustrations or photographs, all as specified in the appropriate annex.NOTE Table 1 gives an example
48、 of the data which can be reported on the CE mark.Table 1 Example of CE mark for characteristics evaluated according to this standardDry and reduced wet selfweight of an acoustic element:Dry weight: 0,70 kNReduced wet weight: 0,92 kNResistance to loadsStructural elementsNormal (90) load due to wind,
49、 static, external and self-weight:Barrier height 3 m 5,2 kN/mBarrier height 4 m 4,4 kN/mBending moment at ground level due to snow clearance: 15 kNmAcoustic elementsMaximum vertical load (Annex B, B.3.2): 150 kN/maAccording to procedure a) Annex AFsafe2,5 kN/m2dsafe20 mmdmaxfor Fsafe.SF, with SF = 1,5 30 mmbAccording to procedure b) Annex AFd503,0 kN/m28 BS EN 17941:2018EN 1794-1:2018 (E)dmaxfor Fd50.SF, with SF = 1,5 60 mmNormal (90) load due to snow clearance the element can withstand: 14 kNaTest p
