EP3098352A1 - Internal structure of a deformation block, deformation block and deformation system - Google Patents

Internal structure of a deformation block, deformation block and deformation system Download PDF

Info

Publication number
EP3098352A1
EP3098352A1 EP15466010.4A EP15466010A EP3098352A1 EP 3098352 A1 EP3098352 A1 EP 3098352A1 EP 15466010 A EP15466010 A EP 15466010A EP 3098352 A1 EP3098352 A1 EP 3098352A1
Authority
EP
European Patent Office
Prior art keywords
deformation
cells
block
internal structure
deformation block
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
EP15466010.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Tomás Micunek
Radoslav Sovják
Michal Frydrýn
Petr Máca
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.)
Cvut V Praze
Original Assignee
Cvut V Praze
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 Cvut V Praze filed Critical Cvut V Praze
Publication of EP3098352A1 publication Critical patent/EP3098352A1/en
Ceased legal-status Critical Current

Links

Images

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

Definitions

  • the invention relates to an internal structure of a deformation block especially for exits, bridges, overpasses, driveways and similar structures that are constructed in roadside ditches that serve for draining roads.
  • the invention also relates to a deformation block from which bridges, overpasses, driveways and similar structures for all kinds of roads are built and a deformation system which consists of single deformation blocks.
  • Another solution to this technical problem is to avoid a self-collision of a vehicle with a solid construction of the exit, bridge or overpass using crash barriers of different structures and shapes that detour vehicles in front of the exit face. Practice shows that even such costly solutions are not effective enough.
  • the cells are formed of a brittle concrete, wherein the cross-sectional area of the cell walls is smaller than the inner cell area.
  • the individual cells In the horizontal cross-section, the individual cells have a square, rectangular or regular hexagonal to octagonal shape, wherein the cross section of cells in adjacent rows can be different. Some walls of the cell cross section may exhibit a convex shape.
  • the deformation block for this purpose consists of at least two rows of cells, wherein the cell axes in different cell rows are mutually offset, and it is provided with a through hole for water drainage.
  • the through hole in the deformation block may extend to the bottom of one of the walls of the deformation block.
  • Individual deformation blocks are assembled in a deformation system which consists of at least two deformation blocks that are arranged in the base shaped piece, the rear face or baffle of which are partially deformable, so that the internal structure of these deformation blocks is crushed against them.
  • the deformation blocks in the deformation system may have different shapes, different sizes or different internal structure.
  • the present invention solves the rigidity of all structures in the horizontal plane, namely of exits, bridges, overpasses and driveways while maintaining the rigidity in the vertical direction as well as the water flow so that the impact of a vehicle to this construction causes a gradual reduction of the vehicle speed.
  • the stiffness of the deformation block in the vertical plane is sufficient for axle loads of passing vehicles.
  • the water passage through the deformation blocks is retained, because the openings in the deformation block are arranged at the very bottom of the deformation block or alternatively in the space above its bottom edge.
  • the internal structure of the deformation block is collapsed in a controlled manner and thereby a gradual deceleration of the vehicle takes place.
  • the internal structure of the deformation block according to the invention effectively dissipates the kinetic energy of the vehicle simply by removing its speed; it means that the kinetic energy of the vehicle is not initially drawn to the deformation of the vehicle crush zones.
  • the deformation block has a sufficient stiffness in the vertical direction and is able to transmit loads from the axle loads.
  • the internal structure of the deformation block can be made from conventional materials, such as cement, silica flour, fine-grained sand, silica flue dust, plasticizers and water, a low price of deformation blocks is guaranteed.
  • these products are due to their dense microstructure and low porosity nearly impermeable and thus their lifespan is comparable to the life of roads.
  • Frost-resistant materials provide resistance of the deformation block against frost.
  • the geometry of the honeycomb design of the deforming block internal structure may be exactly specified according to the requirements and traffic conditions on particular roads.
  • Irreversible changes in the kinetic energy during the vehicle collision take place in the deformation block in three modes.
  • the first mode the collapse of individual cells of the internal structure of the deformation block takes place in the flexural tension.
  • the cells in the deformation block have the same resistance and the level of the withdrawn energy is constant in this mode.
  • the dissipation of kinetic energy causes pushing the destroyed material from already collapsed cells of the inner structure of the deformation block in front of the vehicle itself. While passing through the deformation block, the collapsed material accumulates in front of the vehicle and the resistance against the penetrating vehicle is growing. Withdrawal of the kinetic energy is in this mode is linearly dependent on the depth of penetration of the vehicle into the deformation block.
  • the dissipation of kinetic energy of the vehicle causes compressing the collapsing material in the deformation the system against the rear edge of the base shaped piece.
  • the collapsed material from the whole deformation system is pushed to the rear edge of the base shaped piece and further removal of kinetic energy takes place, which in this case is linearly related to the residual kinetic energy of the vehicle.
  • the crush zones of the vehicle are initialized.
  • Fig. 1 shows the internal structure of the deformation block, wherein the individual cells in a horizontal cross-section have the shape of a rectangle
  • Fig. 2 shows the internal structure of the deformation block, wherein the individual cells in a horizontal cross-section have the shape of a rhombus
  • Fig. 3 shows the internal structure of the deformation block, wherein the individual cells in a horizontal cross-section have the shape of an irregular hexahedron
  • Fig. 4 shows the internal structure of the deformation block, wherein the individual cells in a horizontal cross-section have the shape of another irregular hexahedron
  • Fig. 1 shows the internal structure of the deformation block, wherein the individual cells in a horizontal cross-section have the shape of a rectangle
  • Fig. 2 shows the internal structure of the deformation block, wherein the individual cells in a horizontal cross-section have the shape of a rhombus
  • Fig. 3 shows the internal structure of the deformation block, wherein the individual cells in a horizontal cross-section have the
  • FIG. 5 shows the internal structure of the deformation block, wherein the individual cells in a horizontal cross-section have the shape of an octahedron
  • Fig. 6 shows the internal structure, wherein the individual cells in a horizontal cross-sectional have in adjacent rows of the shape of a different rectangle
  • Fig. 7 shows an actual embodiment of the deformation block with cavities in the shape of a rectangle
  • Fig. 8 shows an actual embodiment of the deformation block with cavities in the shape of a hexahedron
  • Fig. 9 shows an actual embodiment of the deformation block with cavities in the shape of a rectangle with a through hole
  • Fig. 10 shows an actual embodiment of the deformation block with cavities in the shape of a hexahedron with a through hole
  • Fig. 10 shows an actual embodiment of the deformation block with cavities in the shape of a hexahedron with a through hole
  • Fig. 10 shows an actual embodiment of the deformation block with cavities in the shape of a hexahedron with
  • FIG. 11 shows an actual implementation of the deformation system with a deformation block with a through hole, which is arranged in the base shaped piece with a rear edge, thus forming a half of the structure under the exit
  • Fig. 12 shows an actual embodiment of the structure under the whole exit, consisting of two deformation systems
  • Fig. 13 shows a schematic embodiment of the internal structure of the deformation block with arrows that indicate the expected impact of a vehicle with the cells in the shape of a rectangle and square
  • Fig. 14 shows a schematic embodiment of the internal structure of the deformation block with arrows that indicate the expected impact of a vehicle with the cells in the shape of various hexahedrons
  • Fig. 15 shows a schematic embodiment of the internal structure of the deformation block with arrows that indicate the expected impact of a vehicle with the cells that have two convex walls
  • Fig. 16 shows a schematic embodiment of the cells and a process of their brittle fracture, which is the dominant mode of deformation during the dissipation of the kinetic energy of the vehicle.
  • the invention relates to the internal structure of a deformation block especially for exits, bridges, overpasses, driveways and similar structures that are constructed in roadside ditches that serve for draining roads.
  • the invention also relates to a deformation block from which bridges, overpasses, driveways and similar structures for all kinds of roads are built and a deformation system which consists of single deformation blocks.
  • collapses of individual cells occur that gradually draw the kinetic energy of the vehicle to their brittle fracture through reducing its speed only.
  • the rigidity of individual honeycombs and the corresponding deformation stiffness of the whole deformation block are set so that always primarily deformation of the block occurs and not a massive deformation of the vehicle.
  • the internal structure of the deformation unit comprises at least two rows 1,2 of cells 3 , wherein the axes of the cells 3 in the direction of action of impact forces in the individual rows 1.2 of the cells 3 are offset.
  • the cells 3 are formed of a brittle concrete, wherein the cross sectional area of walls of the cells 3 is smaller than the inner area of the cell 3 .
  • the internal structure of the deformation block can also be manufactured from an antifreezing ceramic material or from other materials, the physical properties of which meet the requirements.
  • Individual cells 3 have in a horizontal cross-section the shape of a square, rectangle, or a regular or irregular hexagon to octagon, but in term of the essential requirements under principles of the invention also other shapes of the cells are appropriate.
  • at least one wall of the cross-section of the cell 3 may have a convex shape.
  • the deformation block consists of at least two rows 1,2 of cells 3 , wherein the axes of the cells 3 in the adjacent rows 1.2 of cells 3 are offset. In its bottom portion, the deformation block is provided with a through hole 4 for water drainage. It may extend up to the bottom surface 5 of the deformation block or be located above it.
  • the deformation block may be formed of several parts which may have different internal structure, and thus the collapsing of the individual parts of the deformation block can be affected in a controlled manner and thereby gradually decelerate the vehicle.
  • the deformation block is made of a quasi-brittle material. On impact of a vehicle into the deformation block, collapsing individual cells occurs, and they gradually draw the kinetic energy of the vehicle to their brittle fracture, by reducing its speed only.
  • the rigidity of individual rows of the cells 3 and the corresponding deformation stiffness of the whole deformation block are set so that always primarily deformation of the block occurs and not a massive deformation of the vehicle.
  • the deformation block can be designed so that its upper side is closed, which prevents the penetration of foreign objects into a honeycomb structure, which could result in a reduction in the efficiency of the deformation block.
  • the used material which is high-grade cement composite it is possible to guarantee a sufficient resistance to freezing and thawing cycles and against chemical de-icing substances, and thus to ensure the life-time comparable to the life-time of land communications.
  • the material of the deformation block is frost-proof, wherein the frost resistance is determined after the performance of 50 cycles of freezing and thawing. After performing these cycles, the strength in the three-point flexural tension and compressive strength of the samples are tested.
  • the deformation system of the road exit comprising at least one deformation block which is arranged in the base shaped piece 6 , the rear edge 7 or the baffle 8 of which are partially deformable. Particularly against the rear face 7 or the baffle 8 of the deformation block the brittle internal structure is crushed as a consequence of an impact, as shown in Fig. 16 .
  • the base shaped piece 6 consists of a bottom 9 , right and left lateral walls 10,11 and a rear edge 7.
  • the deformation system may be composed of several deformation blocks, which may have different shapes or dimensions.
  • the internal structure of the deformation block, the quasi-brittle deformation and the deformation system with the controlled design of the internal structure according to the present invention will find application in the field of land communication where there is a need to reduce the risk of injury during traffic accidents.
  • the quasi-brittle deformation controlled block design of the internal structure can be applied in the construction of separate exits, as it allows a controlled deformation in the horizontal direction and provides sufficient rigidity in the vertical direction.
  • the deformation block is also programmed so that during a traffic accident a deformation of the sole quasi-brittle block occurs and only afterwards collapsing the crush zones of the vehicle takes place.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Road Paving Structures (AREA)
EP15466010.4A 2015-05-29 2015-09-17 Internal structure of a deformation block, deformation block and deformation system Ceased EP3098352A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ2015-363A CZ306613B6 (cs) 2015-05-29 2015-05-29 Vnitřní struktura deformačního bloku, zejména stavebního prvku dopravních sjezdů

Publications (1)

Publication Number Publication Date
EP3098352A1 true EP3098352A1 (en) 2016-11-30

Family

ID=54199613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15466010.4A Ceased EP3098352A1 (en) 2015-05-29 2015-09-17 Internal structure of a deformation block, deformation block and deformation system

Country Status (2)

Country Link
EP (1) EP3098352A1 (cs)
CZ (1) CZ306613B6 (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110792710A (zh) * 2019-11-07 2020-02-14 哈尔滨工业大学 一种复合型负刚度吸能蜂窝结构及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2203394A5 (cs) * 1972-10-13 1974-05-10 Beaujean Robert
DE29709396U1 (de) * 1997-04-23 1997-07-24 Prottelith Baustoffe Liebenfels GmbH, Liebenfels Anpralldämpfer aus Leichtbeton
GB2323146A (en) * 1997-03-13 1998-09-16 Darchem Eng Ltd Impact energy absorber
WO2003069070A1 (en) * 2002-02-14 2003-08-21 Cisdi S.P.A. Set of dampening elements for protective barriers description
CN101301771A (zh) * 2008-06-27 2008-11-12 浙江大学 蜂窝状加气混凝土吸能砖的制作方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4352484A (en) * 1980-09-05 1982-10-05 Energy Absorption Systems, Inc. Shear action and compression energy absorber
WO1999055970A1 (fr) * 1998-04-28 1999-11-04 Brigantine S.A. Nid d'abeilles a absorption variable
EP1687549B1 (de) * 2003-11-29 2008-05-14 Erbslöh Aluminium GmbH Energieabsorptionselement
EP1593872A1 (en) * 2004-05-06 2005-11-09 Grupo Antolin-Ingenieria, S.A. Shock absorber and manufacturing procedure thereof
ITRM20070644A1 (it) * 2007-12-14 2009-06-15 Pasquale Impero Pannello metallico a struttura cellulare, relativo procedimento di produzione, e suo utilizzo in un assorbitore d'urto.
ITRM20080022A1 (it) * 2008-01-15 2009-07-16 Pasquale Impero Barriera di sicurezza stradale.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2203394A5 (cs) * 1972-10-13 1974-05-10 Beaujean Robert
GB2323146A (en) * 1997-03-13 1998-09-16 Darchem Eng Ltd Impact energy absorber
DE29709396U1 (de) * 1997-04-23 1997-07-24 Prottelith Baustoffe Liebenfels GmbH, Liebenfels Anpralldämpfer aus Leichtbeton
WO2003069070A1 (en) * 2002-02-14 2003-08-21 Cisdi S.P.A. Set of dampening elements for protective barriers description
CN101301771A (zh) * 2008-06-27 2008-11-12 浙江大学 蜂窝状加气混凝土吸能砖的制作方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110792710A (zh) * 2019-11-07 2020-02-14 哈尔滨工业大学 一种复合型负刚度吸能蜂窝结构及其制备方法
CN110792710B (zh) * 2019-11-07 2021-04-02 哈尔滨工业大学 一种复合型负刚度吸能蜂窝结构及其制备方法

Also Published As

Publication number Publication date
CZ2015363A3 (cs) 2016-12-07
CZ306613B6 (cs) 2017-03-29

Similar Documents

Publication Publication Date Title
ES2581853T3 (es) Lecho de intercepción para vehículos
CN204572000U (zh) 一种用于桥隧结合部位防护危岩落石的洞棚结构
CN207392069U (zh) 一种边坡落石防护系统
ES2974607T3 (es) Sistema de frenado de emergencia y métodos para formar el mismo
KR100834784B1 (ko) 토립자 구속 벌집형 보강재
ES2654933T3 (es) Superficies de actividades usando módulos estructurales
CN104612089B (zh) 一种水泥电杆防撞装置
US20150135613A1 (en) Eco-friendly structure capable of reducing strong wind pressure and storing rainwater and method for manufacturing structure
EA031974B1 (ru) Заградительный блок
EP2661527B1 (de) Schutzsystem für gebäude- oder behälterwände
EP3098352A1 (en) Internal structure of a deformation block, deformation block and deformation system
CN210946837U (zh) 一种边坡防护结构
MX2012012181A (es) Compuerta fusible para una construccion hidraulica, principalmente del tipo presa.
ITRM20080411A1 (it) Dispositivo di contenimento e consolidamento di un terreno.
KR101872725B1 (ko) 화분모듈, 이를 구비한 도로용 중앙분리대 및 그 설치방법
KR102036986B1 (ko) 폐갱수 차단 시공방법
CZ28616U1 (cs) Vnitřní struktura deformačního bloku, deformační blok a deformační soustava
CN108678522A (zh) 一种防爆抗波蜂窝墙
CN106400647B (zh) 用于既有高速公路边坡排水及加固的排水管及其施工方法
CN201473848U (zh) 铺路石稳定器
CN204626424U (zh) 用于河道边坡的台阶式多边形植生砌块
JP6442898B2 (ja) 橋梁
JP4554999B2 (ja) 衝撃吸収用堤体および衝撃エネルギーの吸収方法
CN111851368A (zh) 一种含有破碎吸能结构的防撞墙
CN111809549B (zh) 一种防撞墙

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150929

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20181004

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20210311