EP1793042A1 - Profilé resistant aux chocs pour glissières de sécurité - Google Patents

Profilé resistant aux chocs pour glissières de sécurité Download PDF

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Publication number
EP1793042A1
EP1793042A1 EP05425858A EP05425858A EP1793042A1 EP 1793042 A1 EP1793042 A1 EP 1793042A1 EP 05425858 A EP05425858 A EP 05425858A EP 05425858 A EP05425858 A EP 05425858A EP 1793042 A1 EP1793042 A1 EP 1793042A1
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EP
European Patent Office
Prior art keywords
channel
matching
lateral
impact
bent
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Withdrawn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
EP05425858A
Other languages
German (de)
English (en)
Inventor
Massimo Cucchietti
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.)
Tubosider SpA
Original Assignee
Tubosider 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 Tubosider SpA filed Critical Tubosider SpA
Priority to EP05425858A priority Critical patent/EP1793042A1/fr
Publication of EP1793042A1 publication Critical patent/EP1793042A1/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Withdrawn legal-status Critical Current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
    • E01F15/02—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

Definitions

  • the present invention relates to a ribbed beam suitable for resisting the impact of vehicles against a crash barrier, for use along the edge of roads or bridges, traffic dividers, and the like.
  • crash barriers made of steel usually comprise posts, which are stuck in the ground or anchored to structures and support longitudinal elements, usually called beams, having the scope of resisting the impact of vehicles and directing them back on the roadway.
  • the dimensions and/or the geometry of the beams are designed so that they have a predetermined resistance to torsional and/or bending stress, in order to obtain the desired performance.
  • the barrier is required to have a certain flexibility which allows it to resist the impact without any part of it to break, as well as to prevent the vehicle from jumping over the barrier or overturning.
  • a paved roadway 10 is flanked by a conventional crash barrier comprising upright posts such as 12 rising from the bare ground 14 and supporting a metal channel 16.
  • the dimensions of the channel are designed so that it has a predetermined resistance to torsional and bending stress, according to the requirements of the specific application. Therefore, when different mechanical features are required, e.g., a higher resistance to torsional stress, the channel must be entirely redesigned, e.g., by changing the thickness and/or the dimensions of its walls.
  • Figs. 2-5 show a crash barrier similar to the barrier of Fig. 1, but incorporating an improved beam according to the invention in lieu of channel 16.
  • the beam comprises a metal channel 20 whose opposite, longitudinal edges 22, 24 are bent at right angles to the same direction, whereby one first edge 22 projects inwards of the channel and one second edge 24 consider outwards of it. Bent edges 22, 24 of the channel are perforated with pairs of equally-spaced slots 25, 26 respectively.
  • the back wall 27 of the channel is also perforated with elongated, equally-spaced slots such as 28.
  • a plurality of equally-spaced stiffeners are arranged within channel 20, each of which consists of a shaped steel plate 30 formed into a box having a rectangular, main wall 32 arranged transversely to the channel, and four lateral, square-bent ledges 34, 36, 38, 40 matching with the inner profile of channel 20.
  • the other two lateral ledges 36, 40 are welded to the inside of the side walls of the channel.
  • the stiffeners can be manufactured in series in a conventional way in the field from a steel sheet sheared into the blank shown in Fig. 6, with a rectangular, middle area forming the main wall 32 of the stiffener, and four rectangular, lateral wings forming the lateral ledges 34, 36, 38, 40.
  • the slots in the stiffener may be formed subsequently by milling or, preferably, during the shearing operation.
  • the lateral ledges of the stiffener are bent at right angles and then welded and bolted to the channel.
  • the beam is bolted to the posts at the slots 25, 26 on the edges of the channel.
  • the stiffeners which are welded and bolted within channel 20, act as localized stiffening points with respect to the torsional and bending stress, whereby the overall stiffness of the beam is increased.
  • the lateral ledges 36, 40 which are welded to the lower and upper walls of the channel respectively, help in reinforcing the beam with respect to the shearing and bending stress on a horizontal plane.
  • the stiffeness of the beam is increased by increasing the number of stiffeners, whereby it will be convenient to design the channel so that, without stiffeners, it has the minimum mechanical features required for use on the road as a guardrail.
  • the channel may whether be used directly as a barrier or, as shown in Fig. 7, as a supporting spacer for a impact-resistant, ondulated metal band 46 of a known type.
  • band 46 is also advantageously bolted to the slots 28 made in the back wall of the channel together with the stiffeners.
  • Fig. 8 shows an alternative embodiment of the barrier according to the invention, in which the opposite, longitudinal edges 122, 124 of channel 120 are both bent inwards at right angles. Therefore, with this embodiment, the lateral ledge 138 in front of the posts matches with, and is bolted to, both edges 122, 124.
  • stiffeners are equally spaced along the channel, this arrangement should be regarded as preferred but not necessary.
  • stiffeners could be fastened to the channel in a different way from what described above, e.g., all the four lateral ledges could be welded to the channel.
  • stiffeners and the posts could also be bolted together to the same group of slots 25, 26 in the channel.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
EP05425858A 2005-12-01 2005-12-01 Profilé resistant aux chocs pour glissières de sécurité Withdrawn EP1793042A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05425858A EP1793042A1 (fr) 2005-12-01 2005-12-01 Profilé resistant aux chocs pour glissières de sécurité

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05425858A EP1793042A1 (fr) 2005-12-01 2005-12-01 Profilé resistant aux chocs pour glissières de sécurité

Publications (1)

Publication Number Publication Date
EP1793042A1 true EP1793042A1 (fr) 2007-06-06

Family

ID=36218229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05425858A Withdrawn EP1793042A1 (fr) 2005-12-01 2005-12-01 Profilé resistant aux chocs pour glissières de sécurité

Country Status (1)

Country Link
EP (1) EP1793042A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH489669A (fr) * 1968-03-14 1970-04-30 Morteo Soprefin Spa Barrière routière
US3603562A (en) * 1968-04-09 1971-09-07 Arbed Vehicle guard rails
EP0604277A1 (fr) * 1992-12-18 1994-06-29 Les Profiles Du Centre S.A. Dispositif de sécurité pour voies de circulation de véhicules comprenant un appui indéformable et au moins une lisse déformable continue
DE19601377A1 (de) * 1996-01-16 1997-07-17 Studiengesellschaft Fuer Stahl Schutzplankenanordnung
EP1418274A1 (fr) * 2002-11-06 2004-05-12 SPIG Schutzplanken-Produktions-Gesellschaft mbH & Co.KG Barrière de sécurité pour voies routières

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH489669A (fr) * 1968-03-14 1970-04-30 Morteo Soprefin Spa Barrière routière
US3603562A (en) * 1968-04-09 1971-09-07 Arbed Vehicle guard rails
EP0604277A1 (fr) * 1992-12-18 1994-06-29 Les Profiles Du Centre S.A. Dispositif de sécurité pour voies de circulation de véhicules comprenant un appui indéformable et au moins une lisse déformable continue
DE19601377A1 (de) * 1996-01-16 1997-07-17 Studiengesellschaft Fuer Stahl Schutzplankenanordnung
EP1418274A1 (fr) * 2002-11-06 2004-05-12 SPIG Schutzplanken-Produktions-Gesellschaft mbH & Co.KG Barrière de sécurité pour voies routières

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