EP2383391A2 - Dispositif de sécurité routière pour l'amortissement d'impact - Google Patents

Dispositif de sécurité routière pour l'amortissement d'impact Download PDF

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Publication number
EP2383391A2
EP2383391A2 EP11163907A EP11163907A EP2383391A2 EP 2383391 A2 EP2383391 A2 EP 2383391A2 EP 11163907 A EP11163907 A EP 11163907A EP 11163907 A EP11163907 A EP 11163907A EP 2383391 A2 EP2383391 A2 EP 2383391A2
Authority
EP
European Patent Office
Prior art keywords
uprights
road safety
safety device
longitudinal axis
lateral
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.)
Withdrawn
Application number
EP11163907A
Other languages
German (de)
English (en)
Other versions
EP2383391A3 (fr
Inventor
Guido Santini
Riccardo Trevisan
Massimo Giulio Fornaci
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.)
Autostrade per LItalia SpA
Original Assignee
Autostrade per LItalia SpA
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 Autostrade per LItalia SpA filed Critical Autostrade per LItalia SpA
Publication of EP2383391A2 publication Critical patent/EP2383391A2/fr
Publication of EP2383391A3 publication Critical patent/EP2383391A3/fr
Withdrawn legal-status Critical Current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
    • E01F15/14—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 relates to a road safety device for impact damping, in particular but not exclusively for barrier cusp terminal sections and singular points, adapted to obtain a gradual and controlled deceleration especially for light and medium-light impacting vehicles.
  • the design choices may be subject to further constraints, when it is required that the device should not move back beyond the fixed rear point, for installation in particular conditions, such as, for example, against the wall of a by-pass in a tunnel.
  • the technical task set by the present invention is therefore that of providing a shock-absorbing road safety device which is able to eliminate the drawbacks associated with the prior art.
  • one object of the invention is to provide a shock-absorbing road safety device which is extremely effective, but which has a small volume.
  • Another object of the invention is to provide a shock-absorbing road safety device which has a greater versatility of use so that it may be employed in a greater number of applications.
  • an object of the invention is to provide a shock-absorbing road safety device which is compact and fire-resistant.
  • a road safety device characterized by comprising a plurality of uprights ordered in longitudinal rows which extend in the direction of the longitudinal axis of the device from the front side to the rear side of the device, and in transverse rows which extend from one lateral side to the other of the device transversely with respect to the direction of the longitudinal axis of the device, a plurality of collapsible primary profiles forming a rigid interconnection between the adjacent uprights of the longitudinal rows, a fixed and undeformable rear stop to which the rear transverse row of uprights is rigidly connected, and means for supporting and guiding the sliding of the uprights in the direction of the longitudinal axis of the device, said primary profiles being collapsible in succession by means of opposition of said rear stop following frontal impacts against the front side of the device in such a way as to progressively absorb the kinetic energy released by said frontal impacts.
  • the rear stop comprises a further transverse row of fixed uprights made integral with each other by means of a common support base and rigidly connected, by means of further collapsible primary profiles, to the slidable uprights of the rear transverse row.
  • At least one primary profile has a box-like configuration with a longitudinal axis oriented in the direction of the longitudinal axis of the device.
  • At least one primary profile has means for creating a preferential deformation path in the direction of its own longitudinal axis.
  • At least one primary profile is formed by two sheet-metal strips folded and joined by means of spot-welding.
  • the sheet thickness of the primary profiles positioned at the front is less than the sheet thickness of the primary profiles positioned at the rear.
  • each transverse row is rigidly connected by means of spacers.
  • the uprights have a double C-shaped cross-section.
  • the means for supporting and guiding the sliding of the sliding uprights comprise sliding shoes mounted on the base at least of the longitudinal lateral rows of the uprights and slidably engaged in fixed rails which extend in the direction of the longitudinal axis of the device.
  • the front transverse row of uprights carries at the front one or more collapsible secondary profiles capable of receiving the initial phase of said frontal impacts.
  • At least one secondary profile has an ⁇ -shaped section and a longitudinal axis oriented transversely with respect to the longitudinal axis of the device.
  • a plate is provided so as to surround the front side of the device for uniform distribution, over the device, of the kinetic energy released by said frontal impacts.
  • Preferably means for redirection in the event of lateral impacts are present along at least one of the lateral sides of the device.
  • the redirection means comprise corrugated sheets supported by the lateral uprights.
  • the device is made of steel.
  • the road safety device 1 comprises a plurality of uprights 2 ordered in longitudinal rows 21 and transverse rows 2t.
  • the longitudinal rows 21 of uprights 2 extend in the direction of the longitudinal axis L of the device 1 from the front side 3 to the rear side 4 of the latter, while the transverse rows 2t extend from one lateral side 5 to the other lateral side 6 of the device 1 transversely with respect to the direction of the longitudinal axis L of the device 1.
  • transverse rows 2t of uprights 2 are shown, the front transverse row 2t thereof comprising only two lateral uprights 2, while the three remaining transverse rows 2t each comprise, in addition to the two lateral uprights 2, also a third central upright 2. Consequently there are three longitudinal rows 21 of uprights 2, the central one of which has only three uprights 2 and the lateral ones of which each have four uprights 2.
  • the device 1 has, for each transverse row, a plurality of collapsible primary profiles 7 forming a rigid interconnection between the adjacent uprights 2 of the longitudinal rows 21.
  • a fixed and undeformable rear stop 8 is provided, to which stop the rear transverse row 2t of uprights 2 is rigidly connected.
  • the primary profiles 7 are collapsible in succession as a result of opposition of the rear stop 8 following front impacts against the front side 3 of the device 1 so as to progressively absorb the kinetic energy released by the frontal impacts.
  • the rear stop 8 comprises in turn a further transverse row 2't of fixed uprights 2' made integral with each other by means of a common support base 9 and rigidly connected, by means of further collapsible primary profiles 7', to the slidable uprights 2 of the rear transverse row 2t of sliding uprights 2.
  • the further transverse row 2't also comprises two lateral uprights 2' and a third central upright 2', each aligned in the direction of the longitudinal axis L with the uprights of a corresponding longitudinal row 21 of sliding uprights 2.
  • the base 9 is fixed at a suitable laying depth on a support surface by means of chemical fixing agents.
  • the rear stop 8 plays a fundamental role since it must restrain the entire device 1 during impact. In fact, in order to be able to be positioned in particular locations (for example in front of stationary obstacles), the device 1 must not absolutely move backwards during the impact. Basically, the three uprights 2', being static, absorb all the energy of the device 1 during the impact. Transmission of the energy onto the uprights 2' is not of an impulsive nature, but instead gradual (this being due to the gradual deceleration of the impacting object as the primary profiles 7, 7' are compressed).
  • the rear transverse row 2't of uprights 2' does not undergo either deformation, or displacement, owing to the fact that it is interlocked to the support surface and to its rigidity which is also ensured by reinforcing gussets 20 which connect the uprights 2' to the base 9.
  • the arrangement of the uprights 2, 2' is overall symmetrical with respect to the central, vertical, longitudinal plane of the device 1.
  • Each primary profile 7, 7' has a box-like configuration with a longitudinal axis oriented in the direction of the longitudinal axis L of the device 1.
  • Each primary profile 7, 7' is formed by two sheet-metal strips 10, 11 folded and joined by means of spot-welding and by two base plates 21 which allow mounting thereof on the uprights 2, 2'.
  • Each of the primary profiles 7, 7' has means for creating a preferential deformation path in the direction of its own longitudinal axis, in particular eyelets 12 cut along its longitudinal folding edges.
  • the front portion of the primary profiles 7, 7' are provided with other wider eyelets 22 which offer a further preferential path for deformation of the primary profiles 7, 7' in the direction of their longitudinal axis.
  • the sheet thickness of the primary profiles 7 positioned at the front is less than the sheet thickness of the primary profiles 7' positioned at the rear.
  • the primary profiles 7 have a thickness which is less than that of the primary profiles 7'.
  • the variation in the thicknesses has been chosen so as to have different stages for absorption of the energy.
  • each transverse row 2t which have a double C-shaped cross-section are rigidly connected by means of spacers 13 which have a U-shaped cross-section.
  • each transverse row 2t and 2't of uprights 2 and 2' are respectively connected at their top end and at the base by two spacers 13.
  • the spacers 13 allow uniform and symmetrical displacement of the sliding uprights 2 in the event of frontal impact, while in the event of lateral impact they ensure the rigidity of the device 1 and keep both the sliding uprights 2 and the fixed uprights 2' vertical.
  • the means for supporting and guiding the sliding of the uprights 2 comprise sliding shoes 14 mounted on the base of the longitudinal lateral rows of the uprights 2 and slidably engaged in fixed rails 15 which extend in the direction of the longitudinal axis L of the device 1, along the whole length of the device.
  • the sliding shoe 14 has a plate 26 sliding inside a flattened, tubular, top element 24 of the rail 15 which has, in turn, a plate-like bottom element 25 welded to the top element 24.
  • the rails 15 are fixed onto the support surface by means of chemical fixing agents, for example by means of dual-component epoxy chemical resin, at a suitable minimum fixing depth within the support surface.
  • the front transverse row 2t of uprights 2 carries at its front two collapsible secondary profiles 16 adapted to receive the initial phase of said frontal impacts.
  • Each secondary profile 16 has an ⁇ -shaped section and a longitudinal axis oriented transversely with respect to the longitudinal axis L of the device 1.
  • Each secondary profile 16 also has means for creating a preferential deformation path in the direction transverse to its longitudinal axis, in particular grooves 17 on its top wall and bottom wall which extend in the direction of its longitudinal axis.
  • Means for redirection in the event of lateral impacts are present along the lateral sides 5, 6 of the device 1.
  • the redirection means comprise corrugated sheets 19, in particular four sheets 19 for each lateral side 5, 6 of the device 1, three of which are slidably supported by the three lateral uprights 2 and one of which is fixed to the lateral upright 2'.
  • Suitable spacers 27 connect the sheets 19 to the lateral uprights 2, 2'.
  • the spacers 27 transfer the translatory movement of the sliding sheets 19 to the sliding uprights 2. Instead, during lateral impact, the spacers 27 absorb a small part of the energy of the impacting object.
  • Some spacers 27 have been tapered to prevent sheets 19 jamming during their sliding movement.
  • At least the sliding sheets 19 have various channels 28 which are slidably engaged with special cylindrical members 29 fixed onto the spacers 27 of the uprights 2.
  • the sheets 19 which are thus able to slide in turn allow relative sliding of the sliding uprights 2.
  • the cylindrical members 29 fixed to the sliding uprights 2 also have on their outer end a locking washer 30 which prevents separation of the sliding sheets 19.
  • the particular semi-circular shape of the plate 18 allows it to be fixed directly onto the front lateral sheets 19. In this way the plate 18 ensures the displacement of the sheets 19 longitudinally, the compression of the secondary profiles 16 and finally the overall absorption of the kinetic energy of the impacting object by means of the primary profiles 7, 7'.
  • the primary profiles 7, 7', the uprights 2, 2', the spacers 13, the base 9, the front plate 18 and the sheets 19 are made of steel, for example Fe360 steel for all the components, except for the uprights 2, 2' and the base 9 which are made of Fe43 0 steel.
  • the device 1 ensures absorption of energy in the event of frontal impacts and redirection of the vehicle in the event of a lateral impact.
  • the impact response times may be managed so as to lessen, in both temporal and spatial terms, the deceleration, ensuring a gradual and calibrated absorption of the impact force and therefore the action transmitted to the vehicle and the passengers.
  • the device 1 advantageously ensures that there is no displacement of the rear stop 8 which may therefore protect the obstacle even when the rear stop 8 is positioned flush with the obstacle.
  • the device 1 has proved to be suitable for inclusion in classes Z1 (dimensions of the deflection zone) and D1 (dimensions of the permanent lateral displacement zone) defined by the standard EN 1317-3.
  • the most usual application of the device 1 is that envisaged for confined zones with a small amount of space available at the rear where fire-resistance is required, typically for the protection of cusp terminal sections of by-passes in tunnels.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Lasers (AREA)
  • Road Signs Or Road Markings (AREA)
  • Road Paving Structures (AREA)
EP11163907.6A 2010-04-28 2011-04-27 Dispositif de sécurité routière pour l'amortissement d'impact Withdrawn EP2383391A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2010A000733A IT1399748B1 (it) 2010-04-28 2010-04-28 Dispositivo di sicurezza stradale attenuatore di urti.

Publications (2)

Publication Number Publication Date
EP2383391A2 true EP2383391A2 (fr) 2011-11-02
EP2383391A3 EP2383391A3 (fr) 2014-07-23

Family

ID=43217019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11163907.6A Withdrawn EP2383391A3 (fr) 2010-04-28 2011-04-27 Dispositif de sécurité routière pour l'amortissement d'impact

Country Status (2)

Country Link
EP (1) EP2383391A3 (fr)
IT (1) IT1399748B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2014295833B2 (en) * 2013-11-05 2017-03-02 Shinsung Control Co., Ltd. Crash Cushion
EP3366841A4 (fr) * 2016-06-20 2019-04-24 Makarov, Georgy Vladimirovich Dispositif d'amortissement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8003653A (nl) * 1980-06-24 1982-01-18 Nederlanden Staat Obstakelbeveiliger.
US6461076B1 (en) * 2001-01-03 2002-10-08 Energy Absorption Systems, Inc. Vehicle impact attenuator
MX2007003064A (es) * 2004-09-15 2007-05-21 Energy Absorption System Amortiguador de choque.
DE102008034980A1 (de) * 2008-07-25 2010-02-04 Sps Schutzplanken Gmbh Anpralldämpfer an Verkehrswegen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2014295833B2 (en) * 2013-11-05 2017-03-02 Shinsung Control Co., Ltd. Crash Cushion
EP3366841A4 (fr) * 2016-06-20 2019-04-24 Makarov, Georgy Vladimirovich Dispositif d'amortissement

Also Published As

Publication number Publication date
EP2383391A3 (fr) 2014-07-23
ITMI20100733A1 (it) 2011-10-29
IT1399748B1 (it) 2013-05-03

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