1、Road restraint systems Part 4: Performance classes, impact test acceptance criteria and test methods for terminals and transitions of safety barriers ICs 13.200; 93.080.30 DD ENV 13 17-412002 DD ENV 13 17-412002 Policy and Strategy Committee Amd. No. on 18 March 2002 National foreword Date Comments
2、This Draft for Development is the official English language version of ENV 13174:2001. This publication is not to be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature. It should be applied on this provisional basis,
3、so that information and experience of its practical application may be obtained. Comments arising from the use ofthis Draft for Development are requested so that UK experience can be reported to the European organization responsible for its conversion into a European Standard. A review of this publi
4、cation will be initiated 2 years after its publication by the European organization so that a decision can be taken on its status at the end of its three-year life. The commencement of the review period will be notified by an announcement in Update Standards. According to the replies received by the
5、 end of the review period, the responsible BSI Committee will decide whether to support the conversion into a European Standard, to extend the life of the prestandard or to withdraw it. Comments should be sent in writing to the Secretary ofBSI Subcommittee B/509/1, Road restraint systems, at 389 Chi
6、swick High Road, London W4 4AL, giving the document reference and clause number and proposing, where possible, an appropriate revision of the text. A list of organizations represented on this committee can be obtained on request to its secretary. Cr oss-r e fer enc e s The British Standards which im
7、plement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. O BSI 18 March 2002 I I ISBN O
8、 580 39245 7 EU ROPEAN PRESTAN DARD PRNORME EUROPENNE EUROPISCHE VORNORM ENV 1317-4 November 2001 ICs 13.200; 93.080.30 English version Road restraint systems - Part 4: Performance classes, impact test acceptance criteria and test methods for terminals and transitions of safety barriers Dispositifs
9、de retenue routiers - Partie 4: Classes de performance, critres dacception des essais de choc et mthodes dessai des extrmits et raccordements des glissires de scurit Rckhaltesysteme an Straen - Teil 4: Leistungsklassen, Abnahmekriterien fr Anprallprfungen und Prfverfahren fr Anfangs-, End- und berga
10、ngskonstruktionen von Schutzeinrichtungen This European Prestandard (ENV) was approved by CEN on 30 September 2001 as a prospective standard for provisional application The period of validity of this ENV is limited initially to three years. After two years the members of CEN will be requested to sub
11、mit their comments, particularly on the question whether the ENV can be converted into a European Standard. CEN members are required to announce the existence of this ENV in the same way as for an EN and to make the ENV available promptly at national level in an appropriate form. It is permissible t
12、o keep conflicting national standards in force (in parallel to the ENV) until the final decision about the possible conversion of the ENV into an EN is reached. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Irel
13、and, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in a
14、ny form and by any means reserved worldwide for CEN national Members. Ref. No. ENV 1317-4:2001 E ENV 1317-4:2001 (E) Contents Page Foreword 3 Introduction 4 1 Scope . 4 2 Normative references . 4 3 Abbreviations . 5 4 Terms and definitions . 5 5 Terminals . 7 6 Transitions . 14 7 Test methods . 16 B
15、ibliography 21 2 ENV 1317-4:2001 (E) Foreword This European Prestandard has been prepared by Technical Committee CEN/TC 226 “Road equipment“, the secretariat of which is held by AFNOR. This European Prestandard under the general title “Road restraint systems” consists of the following Parts: - Part
16、1 : Terminology and general criteria for test methods; - Part 2: Performance classes, impact test acceptance criteria and test methods for safety barriers; - Part 3: Performance classes, impact test acceptance criteria and test methods for crash cush- ions; The following Parts are not yet available
17、but in course of preparation : - Part 4: Performance classes, impact test acceptance criteria and test methods for terminals and transitions of safety barriers; - Part 5: Product requirements, durability and evaluation of conformity; - Part 6: Pedestrian restraint systems, pedestrian parapet. Accord
18、ing to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this European Prestandard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Nether- lands, Norway, Portug
19、al, Spain, Sweden, Switzerland and the United Kingdom. 3 ENV 1317-4:2001 (E) Introduction The design purpose of safety barriers installed on roads is to contain or to contain and redirect errant vehicles that either leave the carriage way or are likely to encroach into the path of oncoming vehicles.
20、 EN 131 7-2 deals with the impact performance of a safety barrier. However, difficulties arise in providing adequate safe terminations to the barrier. Consequently, terminals, which are defined as the beginning and/or end treatment of a safety barrier, are required to have specified impact performan
21、ces. A terminal provides a smooth transition from no containment to the containment of the barrier, without introducing additional hazard for head on impacts. Problems may also arise in the connection between two different safety barriers having consistent difference in stiffness. Transitions may be
22、 needed, that are required to have specified impact performances. The objective of this prestandard is to lead to the harmonization of current National Regulations, to categorize them into performance classes and help develop new systems and improve existing systems. This Part of the prestandard def
23、ines the classes of performance required of terminals and transitions for the restraint. The impact severity of vehicles in collision with terminals and transitions is rated by the indices acceleration severity index (ASI), theoretical head impact velocity (THIV) and post-impact head deceleration (P
24、HD). Attention is drawn to the fact that the acceptance of a terminal or transition will require the successful completion of a series of tests (see Tables 1 to 8). To ensure proper use of this Part of this series, it is essential to consider all the other relevant documents within the series. Addit
25、ionally, the quality of manufacture, durability, satisfactory roadside installation and ease of maintenance are important safety criteria. 1 Scope This European Prestandard specifies requirements for the performance of terminals and transitions. It defines performance classes and acceptance criteria
26、 for impact tests. 2 Normative references This European Prestandard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent
27、amendments to or revisions of any of these publications apply to this European Prestandard only when incorporated in it by amendments or revisions. For undated references the latest edition of the publication referred to applies (including amendments). EN 131 7-1 : 1998, Road restraint systems - Par
28、t I: Terminology and general technical criteria for test methods. 4 ENV 1317-4:2001 (E) EN 131 7-2, Road Restraint Systems - Part 2: Performance classes, impact test acceptance criteria and test methods for safety barriers. IS0 6487, Road vehicles - Measurement techniques in impact tests - Instrumen
29、tation. IS0 10392, Road vehicles with two axles - Determination of centre of gravity. 3 Abbreviations AS I THIV PHD VCDI U D A L Acceleration severity index; Theoretical head impact velocity; Post-impact head deceleration; Vehicle cockpit deformation index; Terminal on upstream position; Terminal on
30、 downstream position; Terminal on upstream as well as downstream position; Length of terminal or transition. Impact speed classes abbreviations are: 80 80 km/h 100 100 kmlh 110 110km/h Test vehicle mass codes are: 1 900 kg 2 1300 kg 3 1500 kg 4 Terms and definitions 4.1 terminal treatment of the beg
31、inning andlor the end of a safety barrier NOTE In addition it can provide an anchorage for the barrier system. The length L of a terminal is the longitudinal distance from the nose to the end of the terminal, .e. to the beginning of the barrier. The length of a terminal is shown diagrammatically in
32、Figure 1 for two alternative shapes. 5 ENV 1317-4:2001 (E) - l A 3 B 2 1 I= 4 5 I Key A Barrier B Terminal 3 Side view 4 Plan view - a) 5 Plan view - b) Figure 1 - Length of a Terminal with two alternative shapes (a and b) 4.2 system type tested terminal multiple performance product that can be asse
33、mbled to form different models from the same set of components, to obtain different performances, with the same working mechanism for the system and for its components 4.3 transi ti on so that interface between two safety barriers of different cross section or different lateral stiffness, the con ta
34、 n ment is continuous NOTE 1 The purpose of transitions is to provide a gradual change from the first to the second barrier, to prevent the hazards of an abrupt variation. A transition is designed to connect two specified barriers. The 6 ENV 1317-4:2001 (E) length of a transition is the distance bet
35、ween the ends of the two barriers connected by the transition, as shown schematically in Figure 2. 2 L ,I A B C Key A Barrier B B Transition C BarrierA Figure 2 - Length of a Transition NOTE 2 differing in the working width no more than one class, is not be considered a transition. The junction betw
36、een two barriers having the same cross-section and the same material, and 4.4 removable barrier section part of barrier which allow for quick removal and reinstallation for emergency reasons provision may be required for barrier sections to be temporarily opened, but yet having containment performan
37、ces NOTE If such a barrier has a length not exceeding 40 m, it is be considered to be a special transition. 5 Terminals 5.1 Performance classes Terminals shall be tested in accordance with Table I. The length of the terminal shall conform to the design specification and be installed together with su
38、fficient length of safety barrier so as to demonstrate the performance of the terminal. A successfully tested installation at a given performance class, shall normally be considered as having met conditions of lower classes. NOTE The acceptance tests required for each terminal performance class are
39、reported in Table 1. These are classified according to an increasing containment capacity. 7 ENV 1317-4:2001 (E) Location Table 1 - Terminals: vehicle impact test criteria and performance classes Tests Approach Approach Vehicle Velocity Test refe re n ce mass (kg) (kmlh) code ) Performance class A P
40、I TT 2.1.80 80 head on nose 1/4 offset to roadside 2 900 P2 U D u P3 offset to roadside 2 80 TT 2.1.80 head on nose 1/4 side, 15“ 2/3 L 4 1300 80 TT 4.2.80 side, 165“ 1/2 L 5 900 80 TT 5.1.80 head on nose 1/4 offset to roadside 2 900 1 O0 TT 2.1.100 head-on centre 1 1300 1 O0 TT 1.2.100 900 P4 D u s
41、ide, 15“ 2/3 L 4 1300 1 O0 TT 4.2.100 side, 165“ 1/2 L 5 900 1 O0 TT 5.1.100 head on nose 1/4 offset to roadside 2 900 1 O0 TT 2.1.100 head-on centre 1 1500 110 TT 1.3.1 10 side, 15“ 2/3 L 4 1500 110 TT 4.3.1 10 D I side, 165“ 112 L I 5 - A 900 1 O0 I TT5.1.100 A A - Test code notation is as follows
42、: TT 1 2 1 O0 Test of Approach Test Impact Terminal ve hicle speed mass NOTE 1 To avoid ambiguity, the numbering of the approach path in Table 1 and in Figure 3 is the same as in EN 1317-3; approach 3 is present in EN 1317-3 as test 3 for crash cushions, but it is not required for Terminals. NOTE 2
43、The test with approach 5 is not run for a flared terminal when, at the relevant impact point, the angle (a) of the vehicle path to the traffic face of the terminal is less than 5 O. 8 ENV 1317-4:2001 (E) L d 1 1 3 i 4 I Key O Approach 1 O Approach2 Approach4 O Approach 5 1 Barrier 2 Terminal 3 1/2 v
44、ehicle width 4 1/4 vehicle width Figure 3 -Vehicle approach paths with two alternative shapes of Terminal (a and b) 9 ENV 1317-4:2001 (E) P3 5.2 Tests for system type tested terminals All tests A group of models covering a range of performance classes can be derived from a single Parent Terminal, on
45、ce the latter has been successfully tested to this prestandard. Performance Class Provided that the models in the group: Tests a) b) c) are assembled from the same set of components; have the same product name; have the same working mechanism for the system and for the components, the group, specifi
46、ed by the drawings of all the models, may be tested as a single product with multiple performance possibilities. If the tests specified by the group test matrix are passed, the terminal shall be accepted as a multiple performance product, .e. each model is accepted in the relevant performance class.
47、 If the parent Terminal belongs to the highest performance class the test matrix shall be the one shown in Table 2 or 3, depending on the highest performance class of the group. Table 2 - Parent Terminal P4 I Performanceclass I Tests I I P3 I TT 1.2.100 I I P2 I TT2.1.80 I Table 3 - Parent terminal
48、P3 (shape a) I Performanceclass I Tests I I P2 I TT2.1.80 I If the parent terminal belongs to the performance class P3 and the group covers also the class P4 the test matrix shall be in accordance with Table 4. Table 4 - Parent terminal P3 (shape b) P4 TT 2.1.100 I TT 1.3.110 I I P2 I TT2.1.80 I 10
49、ENV 1317-4:2001 (E) A B 5.3 Impact severity Vehicle occupant impact severity shall be assessed by the indices AS1 and THIV and PHD. NOTE Vehicle deformation is indicated by the measure of Vehicle Cockpit Deformation Index (VCDI). The indices are explained in EN 131 7-1. Two severity levels are determined in Table 5 as a function of the value of the AS1 and THIV and PHD indices. Table 5 - Terminals: Vehicle Impact Severity Classes AS1 5 1,0 AS1 5 1,4 THIV 44 km/h in tests 1 and 2 THIV 33 km/h in tests 4 and 5 THIV 44 km/h in tests 1 and 2 THIV 33 km/h in tests 4 an
