CEN TS 16786-2018 Road restraint systems - Truck Mounted Attenuators - Performance classes impact test acceptance criteria and test performance.pdf

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1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Road restraint systems - Truck Mounted Attenuators - Performance classes, impact test acceptance criteria and test performancePD CEN/TS 16786:2018National forewordThis Published Document is the UK implementation of CEN/

2、TS 16786:2018.The UK participation in its preparation was entrusted to Technical Committee B/509/1, Road restraint systems.A list of organizations represented on this committee can be obtained on request to its secretary.BSI, as a member of CEN, is obliged to publish CEN/TS 16786:2018 as a Published

3、 Document. However, attention is drawn to the fact that during the development of this Technical Specification, the UK committee voted against its approval as a Technical Specification.The main reason for the negative UK committee vote is concern about the inclusion of only 50, 80 and 100 km/h speed

4、 classes.Within the UK road network, truck mounted attenuators are used for a wide variety of tasks on a large number of different roads. This also includes the high-speed road network, where traffic is permitted to travel at speeds up to and including 70 mph. This is equivalent to 113 km/h.Current

5、UK requirements for the testing of truck mounted attenuators (contained within TD 49/07, Requirements for Lorry Mounted Crash Cushions) are for it to be carried out at 110 km/h.CEN/TS 16786:2018 only considers testing with vehicles impacting at up to 100 km/h, and hence there is a gap between these

6、testing requirements and the speeds at which an errant vehicle may impact a truck mounted attenuator on the UK road network. This is considered to represent a safety risk for UK road users.Other reasons for the negative UK committee vote are that CEN/TS 16786:2018 does not require testing laboratori

7、es to be accredited and that deformation of the impacting vehicle does not constitute one of the pass/fail criteria.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Publi

8、shed by BSI Standards Limited 2018ISBN 978 0 580 87333 1ICS 43.080.10; 43.040.80Compliance with a British Standard cannot confer immunity from legal obligations.This Published Document was published under the authority of the Standards Policy and Strategy Committee on 31 May 2018.Amendments/corrigen

9、da issued since publicationDate Text affectedPUBLISHED DOCUMENTPD CEN/TS 16786:2018TECHNICAL SPECIFICATIONSPCIFICATION TECHNIQUETECHNISCHE SPEZIFIKATIONCEN/TS 16786April 2018ICS 43.040.80; 43.080.10EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-

10、CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. CEN/TS 16786:2018: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national MembersRoad restraint systems - Truck Mounted Attenuators - Performance classes, impact test acceptance crite

11、ria and test performanceDispositifs de retenue routiers - Attnuateurs de choc monts sur camions - Classes de performance, critres dacceptation des essais de choc et mthodes dessaiRckhaltesysteme an Straen - Transportfahrzeuggesttzte mobile Anprallverzgerer (TMA) - Leistungsklassen, Abnahmekriterien

12、fr Anprallprfungen und PrfungsleistungenThis Technical Specification (CEN/TS) was approved by CEN on 13 November 2017 for provisional application.The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comments,

13、particularly on the question whether the CEN/TS can be converted into a European Standard.CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep confl

14、icting national standards in force (in parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yu

15、goslav 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.English VersionCEN/TS 16786:2018 (E)Europea

16、n foreword 3Introduction . 41 Scope . 52 Normative references 53 Terms and definitions . 54 Abbreviations. 65 Test parameters . 75.1 Test site 75.2 Test vehicles 75.2.1 Impacting vehicles 75.2.2 Mobile carrier . 85.2.3 Location of the ATD . 95.3 Test matrix 95.4 Accuracies and limit deviations of im

17、pact speeds and approach angle 115.4.1 Vehicle impact speed .115.4.2 Vehicle approach angle 115.4.3 Combined limit deviation of speed and angle .116 Photographic coverage 127 Information to be reported 137.1 General 137.2 General test information 137.3 Structural adequacy . 147.4 Deformation of mobi

18、le carrier . 147.5 Deformation of impacting vehicle . 147.6 Trajectory of the whole system 147.7 Trajectory of impacting vehicle . 157.8 Severity indices 158 Evaluation criteria .158.1 General 158.2 Structural adequacy . 158.3 Deformation of impacting vehicle and mobile carrier .158.4 Trajectory of

19、impacting vehicle . 168.5 Severity index 16Bibliography .172Contents PagePD CEN/TS 16786:2018CEN/TS 16786:2018 (E)European forewordThis document (CEN/TS 16786:2018) has been prepared by Technical Committee CEN/TC 226 “Road equipment”, the secretariat of which is held by AFNOR.Attention is drawn to t

20、he 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.According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound

21、to announce this Technical Specification: 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, Portu

22、gal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.3PD CEN/TS 16786:2018CEN/TS 16786:2018 (E)IntroductionTruck Mounted Attenuators (TMAs) are designed to protect occupants of impacting passenger motor vehicles from impacts with the rear of stationary

23、or slow-moving mobile carriers used in work zones and during maintenance operations. During an impact with a TMA, the mobile carrier is accelerated forward as the impacting vehicle is decelerated. This can, in turn, pose a risk to road workers in front of the support vehicle.This Technical Specifica

24、tion aims to conduct impact testing of whole TMA systems to establish the severity of an impact with the whole system, and to establish the trajectory of the impacting vehicle and mobile carrier following the impact.4PD CEN/TS 16786:2018CEN/TS 16786:2018 (E)1 ScopeThis Technical Specification establ

25、ishes test methods for whole Truck Mounted Attenuator systems (TMAs) under impact.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undat

26、ed references, the latest edition of the referenced document (including any amendments) applies.EN 1317-1:2010, Road restraint systems Part 1: Terminology and general criteria for test methodsEN 13036-4, Road and airfield surface characteristics Test methods Part 4: Method for measurement of slip/sk

27、id resistance of a surface: The pendulum testISO 8349, Road vehicles Measurement of road surface frictionISO 10392, Road vehicles Determination of centre of gravity3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1whole systemTMA, mobile carrier a

28、nd any elements connecting the TMA and the mobile carrier3.2TMAenergy absorbing device fitted to a mobile carrier to reduce the severity of an impact with an impacting vehicle3.3mobile carriervehicle to which the TMA is attached3.4impacting vehiclemotor vehicle impacting the whole system during the

29、type test3.5vehicleany motor vehicle or its trailer as defined in 3.5.1 and 3.5.23.5.1motor vehicleany power-driven roadworthy vehicle which is moved by its own means, having four or more wheels3.5.2trailerany non-self-propelled vehicle on wheels which is designed and constructed to be towed by a mo

30、tor vehicle5PD CEN/TS 16786:2018CEN/TS 16786:2018 (E)3.6testing laboratorycompetent laboratory which measures, examines, tests, calibrates or otherwise determines the characteristics or performance of materials or products within the scope of this documentNOTE A laboratory accredited by a signatory

31、of the European co-operation for accreditation or the appropriate statutory instrument, within the scope of this document, in the territory where the test was executed may be presumed to be competent.3.7test sitelocation of the whole system prior to the test, and the approach, exit path and roll ahe

32、ad distance for the impacting vehicle and mobile carrier3.8energy absorbing elementany part of the TMA or connection piece which is designed, or shown, to absorb energy during an impact by static and/or dynamic deformation and/or attenuation, as reported in at least one of the impact test reports3.9

33、roll aheaddistance that the mobile carrier moves forward after impact by the impacting vehicle3.10test inertial massimpacting vehicle and/or mobile carrier as delivered, including all fluids or fluid replacement if the actual vehicle fluids have been drained, plus ballast and recording and brake equ

34、ipment, but excluding ATD3.11total massmass which includes all items in, on, or attached to, the impacting vehicle or whole system at the beginning of the test3.12automatic impact brakesystem which automatically applies the air brakes on a mobile carrier4 AbbreviationsFor the purposes of this docume

35、nt, the following abbreviations apply.AIB Automatic Impact BrakeASI Acceleration Severity IndexATD Anthropomorphic Test DevicePTV Pendulum Test ValueRFLAT Roll Ahead Distance (on flat ground, as defined in EN 1317-1:2010, 5.1)SRT Skid- Resistance TesterTHIV Theoretical Head Impact VelocityTMA Truck

36、Mounted AttenuatorVCDI Vehicle Cockpit Deformation Index6 PD CEN/TS 16786:2018CEN/TS 16786:2018 (E)5 Test parameters5.1 Test siteThe test site shall be as specified in EN 1317-1:2010, 5.1 and shall extend for a sufficient length forward of the mobile carrier to allow for the measurement of the roll

37、ahead distance. The test site shall also be sufficiently wide to assess the redirection trajectory of the impacting vehicle.Asphaltic or concrete surfaces shall be used. Actions shall be taken to minimize dust generation.A friction test shall be performed in the impact area in accordance with ISO 83

38、49 in dry conditions to estimate the friction coefficient. The friction of the surface of the test site (asphalt or concrete) shall be measured with the Portable Skid- Resistance Tester (SRT) according to EN 13036-4. Friction value and class shall be included in the test report. Also alternative fri

39、ction testers in line with the statement in EN 1436:2007+A1:2008, 4.5, can be used. EN 13036-4 calls the measuring device a Pendulum Tester and uses it to determine the Pendulum Test Value (PTV) which gives an indication about the skid/slip resistance of a surface. All details shall be included in t

40、he test report.Conditions such as a polished surface or a bleeding asphalt surface that could lower available tyre-pavement friction shall not be used. Gravel or any other particulate shall not be added to the test area to alter the tyre-pavement friction.5.2 Test vehicles5.2.1 Impacting vehiclesThe

41、 900 kg impacting vehicle shall meet the requirements of EN 1317-1:2010, 5.2 and EN 1317-1:2010, Table 1.The 2 000 kg impacting vehicle shall meet the requirements of EN 1317-1:2010, 5.2 and the vehicle specifications under test conditions shall be as specified in Table 1.7PD CEN/TS 16786:2018CEN/TS

42、 16786:2018 (E)Table 1 Impacting Vehicle SpecificationsMass kgTot al mass 2 000 75Test inertial mass 2 000 75Maximum ballasta200Dimensions mLimit deviation (15 %)Wheel track (front and rear) 1,6Centre of mass location mbLongitudinal distance from front axle (CGX) 10 % 1,4Lateral distance from vehicl

43、e centre line (CGY) 0,10Height above ground of vehicle mass (CGZ) 10 % 0,65Type of vehicle Motor VehicleNumber of axlesc1S+1aIncluding measuring and recording equipment. bThe centre of mass of vehicles with two axles shall be determined in conformity with ISO 10392. cS: steering axle All impacting v

44、ehicles shall be less than 8 years old (from the date of manufacture) at the time of the test and shall be representative of current traffic in Europe.NOTE This requirement has been set based on the average European passenger car age (of 8,3 years) as reported by the European Automobile Manufacturer

45、s Association data, 2012.5.2.2 Mobile carrierThe type of mobile carrier (either a motor vehicle or a trailer) shall be the same type for all of the tests within the same speed class.All ballast weights shall be securely fixed to the mobile carrier in such a way as not to exceed the manufacturers spe

46、cifications for distribution of weight in the horizontal and vertical planes.Where the mobile carrier is a motor vehicle:a) the motor vehicle shall be roadworthy;b) the Automatic Impact Brake (AIB) shall be switched off during the testing, if the motor vehicle is equipped with it;c) the motor vehicl

47、e shall be set as shown in Table 2.Table 2 Condition of mobile carrier prior to testMobile carrier (where applicable)Transmission Parking brake Steering AngleNeutral On 0 5Where the mobile carrier is a trailer:d) the trailer shall be roadworthy;e) the Automatic Impact Brake (AIB) shall be switched o

48、ff during the testing, if the trailer is equipped with it;8 PD CEN/TS 16786:2018CEN/TS 16786:2018 (E)c) the trailer shall be set as shown in Table 2, where these conditions can be set.5.2.3 Location of the ATDFor testing with a 900 kg vehicle, the ATD shall be located in the front seat of the impact

49、ing vehicle on the driver side of the vehicle, and secured by means of the vehicle seat belt.5.3 Test matrixTMAs shall be tested in accordance with the impact test criteria in Table 3 or Table 4 or Table 5 and shall be classified in accordance with the associated speed class.The manufacturer shall declare the range of the total mass of the whole system prior to testing.Where the manufacturer declares that there is no maximum total mass of the whole system, test approaches 1 and 3 shall be conducted with a rigidly blocked whole system to demons