WO2009090681A1 - Glissière de sécurité routière - Google Patents

Glissière de sécurité routière Download PDF

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Publication number
WO2009090681A1
WO2009090681A1 PCT/IT2009/000009 IT2009000009W WO2009090681A1 WO 2009090681 A1 WO2009090681 A1 WO 2009090681A1 IT 2009000009 W IT2009000009 W IT 2009000009W WO 2009090681 A1 WO2009090681 A1 WO 2009090681A1
Authority
WO
WIPO (PCT)
Prior art keywords
impact energy
attenuator
safety barrier
panels
barrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IT2009/000009
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English (en)
Inventor
Pasquale Impero
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2009090681A1 publication Critical patent/WO2009090681A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
    • E01F15/02—Continuous barriers extending along roads or between traffic lanes
    • E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
    • E01F15/0407—Metal rails
    • E01F15/0438—Spacers between rails and posts, e.g. energy-absorbing means
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
    • E01F15/14—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact specially adapted for local protection, e.g. for bridge piers, for traffic islands
    • E01F15/145—Means for vehicle stopping using impact energy absorbers
    • E01F15/146—Means for vehicle stopping using impact energy absorbers fixed arrangements

Definitions

  • the present invention generally refers to longitudinal road safety barriers, including those installed along the road borders, those set on the central traffic divider and those on the edge of a bridge; it also refers to impact energy attenuators.
  • the performance class of a road barrier is measured through the ASI index.
  • the acceleration severity index, ASI is a function of time, and is calculated with the following equation:
  • O x , a y , a - are the acceleration components of a point P inside the body of the vehicle close to the center of gravity, averaged over a 50 ms mobile time window
  • a* ⁇ , a* y , a* z are the limit values for the acceleration components along the vehicle axes x, y, z, respectively equal to 12g, 9g and 1Og (g is the acceleration due to earth's gravity).
  • a longitudinal barrier is of class A if it has an ASI ⁇ 1, while it is of class B if it has an
  • a first aspect of the invention regards the longitudinal safety barriers, which constitute road safety barriers for vehicles and are installed along the borders of a road or on the central traffic divider. We will first describe the performances of the barriers of the prior art below.
  • the longitudinal safety barriers are classified on the basis of the containment level.
  • the containment level is a function of the maximum kinetic energy that the barrier is capable of absorbing due to the impact of a vehicle.
  • the applicant's research activity was concentrated on the road barriers of type Hl, H2 and H3, respectively characterized by a kinetic energy value of 126.6 kJ, 287.5 kJ and
  • the performances of the barrier H3 proposed by the applicant were compared with the lateral edge barrier H3 produced by the company Marcegaglia.
  • the comparison is based on the calculation results of the finite element method executed by means of an explicit code, as well as on relative practical tests.
  • the H3 Marcegaglia safety barrier was modeled starting from the structural drawings of the same barrier which are available on-line on the Marcegaglia website.
  • Fig. 1 shows the FE (finite element) model of the H3 Marcegaglia barrier.
  • Fig. 2 the impact dynamics are reported for the Marcegaglia barrier.
  • the double wave spacer in the lower part of the barrier, collapses, while the spacer related to the triple wave, in the upper part of the barrier, remains practically non-deformed (see also Fig. 3). It is too rigid and makes the impact quite harmful for the motor vehicle occupants. Indeed, it is observed in Fig.
  • FIG. 8 shows the HIC progression (defined below in the detailed description) of an accelerometer placed inside the vehicle at the position of the driver's head, so to evaluate the damage caused to the occupants in the case of the two barriers (prior art (Marcegaglia), and present invention). Also under this aspect, the prior art can be improved.
  • the present invention intends to provide a longitudinal road safety barrier, which for a lateral impact, on the side of the barrier itself, has the following improved characteristics: - reduced overall height of the barrier, which reduces the risk of impact of the head of the passenger against the barrier itself;
  • the present invention regards the impact energy attenuators: the attenuator can be connected to the barrier itself or it can also exist on its own, independent of the same.
  • An impact energy attenuator is a device placed before an obstacle in order to dampen the violence of the impact.
  • An impact energy attenuator is placed wherever there is a fixed obstacle, not protected by safety barrier, for example, therefore, in front of: - non-pliable sign poles (portals) and lighting poles
  • the object of the present invention is that of obtaining impact energy attenuators with ASI less than 1 and which are not as long as those of the prior art.
  • one object of the present invention is that of providing impact energy attenuators having the preceding innovative/advantageous characteristics that can both be connected to the longitudinal safety barriers and mounted on their own to protect tollbooths, art works, pillars and other objects.
  • the present invention in particular concerns a road barrier equipped with an impact energy attenuator according to the present invention.
  • the objects of the invention related to the second aspect are obtained by means of the characteristics contained in the dependent claims 6-15 and the independent claim 16.
  • the two aspects of the invention are united by the use of hexagonal cell panels, wherein said panels are arranged in a manner such that the impact of the vehicle occurs against the plane defined by the hexagonal cell panels, and not orthogonally to the plane itself.
  • the hexagonal cell structure is made by means of a ductile metal material, having a high capacity to be inelastically deformed when the system is subjected to stresses in the hexagon plane.
  • FIGURE Ia is a type H3 barrier model of the prior art (Marcegaglia company), shown in cross section, in which the vehicle is approaching the barrier with an impact angle that is provided for by the certification standards;
  • FIGURE Ib is the barrier model shown in Fig. Ia, seen in perspective and from its rear side;
  • FIGURE 2 is the impact dynamics for the barrier of Figures Ia and Ib;
  • FIGURE 5 shows the dynamics of the impact for the barrier H3 of the invention, illustrated in the preceding Fig. 4;
  • FIGURE 6 represents a detail of the impact for the barrier of H3 type of the present invention, already shown in the preceding Figures 4 and 5;
  • FIGURE 7 shows the time progressions of the ASI index for the barrier of the prior art (Marcegaglia, light curve) and for the barrier of the present invention (dark curve);
  • FIGURE 8 shows a comparison between the parameter HIC(t) (in g units) for the barrier of the prior art (light curve) and for the barrier of the present invention ("AMS": dark curve), as a function of the collision time (in seconds);
  • FIGURE 9 is a plan and section view of the modular impact energy attenuator of the present invention, made by means of hexagonal cell panels, in a first embodiment thereof;
  • FIGURE 10 is a perspective view of inside the impact energy attenuator of a longitudinal safety barrier with strips and bars (posts), the impact energy attenuator being arranged in the head part (terminal) of the safety barrier;
  • FIGURE 1 Ia is a side view of a traditional, non-redirective impact energy attenuator with "performance level 50"
  • FIGURE 1 Ib is a plan view of the traditional impact energy attenuator shown in Fig. 11a;
  • FIGURE 12 shows an automobile which is about to hit an impact energy attenuator model of the present invention of "performance level 50";
  • FIGURE 13 shows the dynamic behavior (for a collision of type TC 1.1.50) in the case of the attenuator of the present invention shown in Fig. 12;
  • FIGURE 14 illustrates the progression of the ASI as a function of time for the TC 1.1.50 test on the impact energy attenuator of the present invention
  • FIGURE 15a is a side view of the prior art reference attenuator for "performance level 80" tests for non-redirective attenuators;
  • FIGURE 15b is the corresponding plan view
  • FIGURE 16 is an impact energy attenuator model according to the present invention, for "performance level 80" tests.
  • the double wave 1 was in practice substituted with a triple wave 1', whose thickness is reduced.
  • the spacers 2, 3 were substituted with the hexagonal cell panel 4.
  • the introduction of the hexagonal cell panel 4 and the two triple waves I 1 , 1" permitted reducing the overall height of the 150 mm barrier.
  • a lower barrier reduces the risk of impact of the passenger head against the barrier itself.
  • HIC(t) 1/ ⁇ I a r (t')dt' t
  • HIC(t) 1/ ⁇ I a r (t')dt' t
  • the present invention was described, with regard to its first aspect, in the case of a strip and bar barrier. Nevertheless, the present inventive concept could also be applied to other barrier types, if one wishes to protect the barrier in specific points with the hexagonal cell panels arranged in a direction substantially orthogonal to the longitudinal extension of the barrier.
  • An impact energy attenuator is a device placed in front of an obstacle in order to dampen the impact violence.
  • An impact energy attenuator is positioned wherever there is a fixed obstacle that is unprotected by a safety barrier: for example, therefore, in front of: * non-pliable sign poles (portals) and lighting poles
  • the objective of the simulations was to obtain energy absorbers, i.e. impact energy absorbers, with ASI of less than 1 and which are not as long as those of the prior art.
  • the impact energy attenuator as shown in Fig. 9, has a U-shaped portion 13 which covers the inner part of the actual attenuator (with components 10, 11, 12).
  • the attenuator of the invention was modeled and made starting from the impact energy absorber TAU, PARALLEL 60 model of Sn S.p.A.
  • the attenuator of the present invention is connected to the road barrier 15 (Figs. 9 and 10) while the TAU model is not.
  • the model of the invention has a curved triple wave, (formed by the aforesaid U-shaped portion 13), the TAU model has a plastic band of fluorescent color.
  • test type TC 1.1.50. of the reference standard provides for a frontal impact with a
  • the attenuator, subject of the invention, that is used for such simulations has hexagonal cell panel modules arranged in series, having cells with progressively greater thickness: for example 1.2/1.2/1.5 mm.
  • Fig. 12 the performance level 50 attenuator model proposed by the present invention is reported;
  • Fig. 13 reports its dynamic behavior for an impact of type TC 1.1.50.
  • the reference attenuator for the simulations and the tests was the redirective impact energy absorber TAU, PARALLEL 80 model of Sn S.p. A. whose scheme is reported in Fig. 15a and Fig. 15b.
  • the standard UNI EN 1317-3 provides for four different tests:
  • the attenuator of the invention used for such simulations has grating packs (modules) 10, 10, ... , arranged in series, with panels 11 with hexagonal cells having progressive thickness: 1.2 in the curved part/1.4/1.5/1.6/1.7/1.8/2.0 mm.
  • AMS present invention
  • the attenuator model proposed by the applicant for the performance level 80 has longitudinal size equal to about half that proposed by the prior art and ensures a considerably lower ASI value than that of the prior art.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)

Abstract

L'invention concerne l'utilisation de panneaux constitués d'alvéoles hexagonales réalisés en matériau ductile à déformation non élastique dans le domaine des glissières de sécurité routière et des dispositifs d'atténuation d'énergie de chocs. Les panneaux sont orientés de manière à subir une déformation dans le plan des cellules hexagonales en cas de choc. La déformation des panneaux provoque une décélération contrôlée du véhicule, procurant ainsi des résultats améliorés avec une valeur d'ASI inférieure à celle des glissières conventionnelles au regard de la norme UNI-EN 1317.
PCT/IT2009/000009 2008-01-15 2009-01-14 Glissière de sécurité routière Ceased WO2009090681A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM20080022 ITRM20080022A1 (it) 2008-01-15 2008-01-15 Barriera di sicurezza stradale.
ITRM2008A000022 2008-01-15

Publications (1)

Publication Number Publication Date
WO2009090681A1 true WO2009090681A1 (fr) 2009-07-23

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Family Applications (1)

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PCT/IT2009/000009 Ceased WO2009090681A1 (fr) 2008-01-15 2009-01-14 Glissière de sécurité routière

Country Status (2)

Country Link
IT (1) ITRM20080022A1 (fr)
WO (1) WO2009090681A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102889984A (zh) * 2012-10-11 2013-01-23 招商局重庆交通科研设计院有限公司 波形梁护栏安全性能现场静载检测方法
CN105178219A (zh) * 2015-08-26 2015-12-23 宁波大学 一种蜂窝状防阻块中央护栏
CZ306613B6 (cs) * 2015-05-29 2017-03-29 ÄŚVUT v Praze Vnitřní struktura deformačního bloku, zejména stavebního prvku dopravních sjezdů
CN107503310A (zh) * 2017-08-29 2017-12-22 门丫 一种基于多重防护装置的桥梁防撞系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH432573A (it) * 1966-08-20 1967-03-31 Holecz Ferenc Barriera protettiva dei margini autostradali e della zona spartitraffico
GB2083162A (en) * 1980-09-05 1982-03-17 Energy Absorption System Shear action and compression energy absorber
DE3106694A1 (de) * 1981-02-23 1982-09-09 Hermann Hans 8750 Aschaffenburg Urlberger "stossdaempfende vorrichtung und verwendung derselben in einem schutzplankensystem"
DE4131937A1 (de) * 1991-09-25 1993-04-08 Spig Schutzplanken Prod Gmbh Leitplankenanordnung aus stahl
WO1999055970A1 (fr) * 1998-04-28 1999-11-04 Brigantine S.A. Nid d'abeilles a absorption variable

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH432573A (it) * 1966-08-20 1967-03-31 Holecz Ferenc Barriera protettiva dei margini autostradali e della zona spartitraffico
GB2083162A (en) * 1980-09-05 1982-03-17 Energy Absorption System Shear action and compression energy absorber
DE3106694A1 (de) * 1981-02-23 1982-09-09 Hermann Hans 8750 Aschaffenburg Urlberger "stossdaempfende vorrichtung und verwendung derselben in einem schutzplankensystem"
DE4131937A1 (de) * 1991-09-25 1993-04-08 Spig Schutzplanken Prod Gmbh Leitplankenanordnung aus stahl
WO1999055970A1 (fr) * 1998-04-28 1999-11-04 Brigantine S.A. Nid d'abeilles a absorption variable

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102889984A (zh) * 2012-10-11 2013-01-23 招商局重庆交通科研设计院有限公司 波形梁护栏安全性能现场静载检测方法
CZ306613B6 (cs) * 2015-05-29 2017-03-29 ÄŚVUT v Praze Vnitřní struktura deformačního bloku, zejména stavebního prvku dopravních sjezdů
CN105178219A (zh) * 2015-08-26 2015-12-23 宁波大学 一种蜂窝状防阻块中央护栏
CN105178219B (zh) * 2015-08-26 2017-08-15 宁波大学 一种蜂窝状防阻块中央护栏
CN107503310A (zh) * 2017-08-29 2017-12-22 门丫 一种基于多重防护装置的桥梁防撞系统
CN107503310B (zh) * 2017-08-29 2018-09-14 铁建中原工程有限公司 一种基于多重防护装置的桥梁防撞系统

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Publication number Publication date
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