EP1443153A1 - Strebenverbindungsknoten für eine netzartige Raumfachwerkstruktur - Google Patents

Strebenverbindungsknoten für eine netzartige Raumfachwerkstruktur Download PDF

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Publication number
EP1443153A1
EP1443153A1 EP03405043A EP03405043A EP1443153A1 EP 1443153 A1 EP1443153 A1 EP 1443153A1 EP 03405043 A EP03405043 A EP 03405043A EP 03405043 A EP03405043 A EP 03405043A EP 1443153 A1 EP1443153 A1 EP 1443153A1
Authority
EP
European Patent Office
Prior art keywords
bars
compression
elements
assembly according
central element
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Withdrawn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
EP03405043A
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English (en)
French (fr)
Inventor
Etienne Fest
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.)
Ecole Polytechnique Federale de Lausanne EPFL
Original Assignee
Ecole Polytechnique Federale de Lausanne EPFL
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 Ecole Polytechnique Federale de Lausanne EPFL filed Critical Ecole Polytechnique Federale de Lausanne EPFL
Priority to EP03405043A priority Critical patent/EP1443153A1/de
Publication of EP1443153A1 publication Critical patent/EP1443153A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E04B1/1903—Connecting nodes specially adapted therefor
    • E04B1/1906—Connecting nodes specially adapted therefor with central spherical, semispherical or polyhedral connecting element
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E04B2001/1957—Details of connections between nodes and struts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E04B2001/1957—Details of connections between nodes and struts
    • E04B2001/196—Screw connections with axis parallel to the main axis of the strut
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E04B2001/1957—Details of connections between nodes and struts
    • E04B2001/1966—Formlocking connections other than screw connections
    • E04B2001/1969—Ball and socket type connection
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E04B2001/1996—Tensile-integrity structures, i.e. structures comprising compression struts connected through flexible tension members, e.g. cables

Definitions

  • the present invention relates to an assembly node compression elements for cross-linked spatial structure, in particular for a structure of tensegrity type.
  • a structure of tensegrity (of English “tensegrity", resulting from the contraction of the words “tensile” and “integrity”) is a reticular spatial structure formed of bars and cables, and whose rigidity and stability come from its state of self-restraint due to the combination cuts in the bars and pulls in the cables.
  • This is a lightweight structure, easily demountable, and which offers the builder modularity, reuse and achievements architectural unpublished, very slender.
  • This type of structure has been used so far only for the production of works art, because one of the major difficulties for its realization lies in the design of the assembly nodes which must be made in the form of patella so that the elements act as stiff-bar elements unilateral.
  • the purpose of the present invention is to propose a node assembly of compression elements for spatial structure reticulated, in particular for a structure of the type tensegrity, to overcome the disadvantages of the nodes known assembly and in particular to ensure the serviceability of the said structure.
  • the present invention relates to a knot assembly of compression elements for spatial structure reticulate, characterized by a central element having portions of curved surfaces with centers of curvature confused, on which the end of each of the elements in compression by simple contact in the minus one point, so as to constitute a kneecap, so that the resultants of the compression forces of each of said compressive elements converge substantially at the center of the central element.
  • the assembly node according to the present invention has been designed so that the resulting compression forces of each of the compressed elements are convergent, of a part in order to limit the eccentricities inducing moments parasites in the node or in the compressed elements, and on the other hand so as to allow rotations and translations of said compressed elements with respect to the central element that can occur during assembly and the commissioning of the structure, as well as when the structure is then subjected to heavy demands.
  • the knot would not be stable and would have tendency to turn. This node must therefore be realized under shape of patella.
  • a ball of a first type consisting of a rounded shape 1, for example spherical or hemispherical, coming to rest on a cone 2, as represented in FIG. 1
  • a patella of a second type under the shape of a conical element 3 coming to rest on a shape 4 rounded, for example spherical or hemispherical, as represented in FIG. 2.
  • the room fixed 2, 4 is shown hatched.
  • the assembly node according to the present invention is embodied in the form of a patella of the second type mentioned above.
  • FIGS. 4, 5a and 5b The example of an assembly node according to the present invention shown in FIGS. 4, 5a and 5b, includes a ball spherical 7 in hardened, lubricated steel, on which press the conical ends of six compressed bars. As shown in FIG. 4, for any translation or ⁇ rotation of one of the bars, the bar is always centered. In addition, the redundancy of such a system accentuates its stability. In this respect, it can be noted that three bars properly arranged would be sufficient to ensure the directional stability of the node in space. It is so possible to make assembly nodes according to the invention with any number of bars, greater than or equal to three. However, the higher the number of bars, the higher the ball diameter must be large or respectively the larger the diameter of the bars should be small relative to the diameter ball to prevent the bars from coming into contact.
  • the ball which can be replaced by a hollow ball, may also be made of any other metal or ceramic or any other suitable material.
  • the extremities bars can be made of steel or any other metal or composite materials or any other suitable material.
  • the ball may not be spherical, but made for example based on a cube or other figure geometrically, and whose surface is machined or arranged so to present spherical or rounded surface portions at the support points of the bars, all these surfaces having the same center of curvature.
  • FIG. 6 An example embodiment of a compression bar for an assembly node according to the present invention is represented in FIG. 6.
  • This bar has one end 10 having a machined face 11 of conical shape to cooperate with the spherical ball.
  • This bar has a part threaded 12, on which are mounted a nut 13 and a lock nut 14 to allow the adjustment of the length of the compression element, the other end of the bar being mounted so that it can slide inside a compression tube 16 via a sleeve 17.
  • a washer 18 is disposed behind the nut so that the bar is supported, when compressed, against the said muff. The whole is realized without mechanical connection other than the washer / sleeve contact.
  • the part Threaded bar and nut could be replaced by a simple shoulder of the bar arranged to cooperate with the muff. Any other form of compression bars is good heard also possible.
  • the end 11, intended for contact with the ball, of the bar shown in FIG. 6 has a conical surface very open, with a cone angle of 170 °.
  • the conical shape is convenient for reasons of ease of machining and angle 170 ° has proved to be well adapted. But other angles, greater than or less than 170 °, may be used.
  • the shape of the end surface of the bar could be different, such as tetrahedral, spherical, or any other curve, or even flattened shape.
  • the spherical ball is lubricated to allow rotations and / or translations of the ends of the bars to its surface, in particular at the time of setting up for service or when strong demands in service.
  • This lubrication can by example be obtained by means of a lubricator that passes through a channel provided for this purpose within one or more bars.
  • connection between the compression bars and the spherical ball is made by simple contact without mechanical connection
  • assembly of the assembly requires a additional mounting device that can be realized in the form of a cylinder 20 as shown in Figs 7a, 7b and 8, arranged around the spherical ball 4 and crossed by the ends of the six bars.
  • lights 21 are machined in the cylinder.
  • the spherical ball 7 can be locked in the cylinder of mounting by two adjusting screws 22, 23 to adjust the height of the spherical ball and to block it, said screws capable of being mounted on threaded ties 24, 25 arranged at both ends of the mounting cylinder. So that the ends of the bars are retained by the cylinder 20, the bars 6 comprise a portion 8 of reduced diameter below their ends 10 so as to constitute a shoulder 9 which is retained inside the cylinder.
  • the cylinder can be took of.
  • the assembly node the invention is used in structures intended to undergo large displacements, one can plan to keep at home the cylinder on the knot which then constitutes a cylinder of security.
  • the cylinder can be replaced in of service by a "shell" of flexible material that we inject around the ball, for example in a material elastomer.
  • the cylinder can be replaced by any other suitable device, for example a cap.
  • the assembly node according to the present invention which allows the convergence to a point, as we have seen, of resulting from the forces of the compressed elements, this only by contact without mechanical connection, is a solution costly, since no welding, no drilling or bending is not necessary.
  • This solution can be applied only to reticular spatial structures with bars as described in the example above, but also to any other type of structure, for example deployable structures, rides and also in the medical field, for the realization of prostheses, for example of hip prostheses.
  • the compressed elements are not not necessarily bars, but can be elements in any form, the same element may have more than one point of contact with the central element of the node.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Prostheses (AREA)
EP03405043A 2003-01-29 2003-01-29 Strebenverbindungsknoten für eine netzartige Raumfachwerkstruktur Withdrawn EP1443153A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03405043A EP1443153A1 (de) 2003-01-29 2003-01-29 Strebenverbindungsknoten für eine netzartige Raumfachwerkstruktur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03405043A EP1443153A1 (de) 2003-01-29 2003-01-29 Strebenverbindungsknoten für eine netzartige Raumfachwerkstruktur

Publications (1)

Publication Number Publication Date
EP1443153A1 true EP1443153A1 (de) 2004-08-04

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EP03405043A Withdrawn EP1443153A1 (de) 2003-01-29 2003-01-29 Strebenverbindungsknoten für eine netzartige Raumfachwerkstruktur

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EP (1) EP1443153A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106284649A (zh) * 2016-08-29 2017-01-04 陕西建工机械施工集团有限公司 一种焊接球网架杆件的球内斜对接施工方法
CN107701909A (zh) * 2017-10-31 2018-02-16 北京建筑大学 可拼接结构单元、可拼接结构单元的组合
CN109723148A (zh) * 2018-03-22 2019-05-07 王维奇 带有可施加预应力的铰的自应力结构单元体和其应用及其制作方法
CN115781580A (zh) * 2022-12-08 2023-03-14 中建材(合肥)钢构科技有限公司 一种便于弦杆安装的拼接装置
CN116275993A (zh) * 2022-12-08 2023-06-23 中建材(合肥)钢构科技有限公司 一种网架拼装装置
CN116537365A (zh) * 2023-05-16 2023-08-04 哈尔滨建创钢结构有限公司 一种采用弹簧支撑加强的焊接空心球节点及其施工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2047271A1 (de) * 1969-12-03 1971-06-09 VEB Metalleichtbaukombinat, χ 7010 Leipzig Knoten fur raumliche Fachwerkkonstruk tionen
DE2232378A1 (de) * 1972-07-01 1974-01-10 Hamm Wilfried Gekruemmtes tragwerk
DE2421758B1 (de) * 1974-05-06 1975-03-06 Heinz Dipl.-Ing. 8482 Neustadt Horn Knotenpunktverbindung fuer ebene oder raeumliche fachwerke
GB2315286A (en) * 1996-07-17 1998-01-28 Ahmed Mahmoud Kafafi Structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2047271A1 (de) * 1969-12-03 1971-06-09 VEB Metalleichtbaukombinat, χ 7010 Leipzig Knoten fur raumliche Fachwerkkonstruk tionen
DE2232378A1 (de) * 1972-07-01 1974-01-10 Hamm Wilfried Gekruemmtes tragwerk
DE2421758B1 (de) * 1974-05-06 1975-03-06 Heinz Dipl.-Ing. 8482 Neustadt Horn Knotenpunktverbindung fuer ebene oder raeumliche fachwerke
GB2315286A (en) * 1996-07-17 1998-01-28 Ahmed Mahmoud Kafafi Structure

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106284649A (zh) * 2016-08-29 2017-01-04 陕西建工机械施工集团有限公司 一种焊接球网架杆件的球内斜对接施工方法
CN106284649B (zh) * 2016-08-29 2019-01-25 陕西建工机械施工集团有限公司 一种焊接球网架杆件的球内斜对接施工方法
CN107701909A (zh) * 2017-10-31 2018-02-16 北京建筑大学 可拼接结构单元、可拼接结构单元的组合
CN107701909B (zh) * 2017-10-31 2023-05-19 北京建筑大学 可拼接结构单元、可拼接结构单元的组合
CN109723148A (zh) * 2018-03-22 2019-05-07 王维奇 带有可施加预应力的铰的自应力结构单元体和其应用及其制作方法
CN115781580A (zh) * 2022-12-08 2023-03-14 中建材(合肥)钢构科技有限公司 一种便于弦杆安装的拼接装置
CN116275993A (zh) * 2022-12-08 2023-06-23 中建材(合肥)钢构科技有限公司 一种网架拼装装置
CN116275993B (zh) * 2022-12-08 2023-12-01 中建材(合肥)钢构科技有限公司 一种网架拼装装置
CN116537365A (zh) * 2023-05-16 2023-08-04 哈尔滨建创钢结构有限公司 一种采用弹簧支撑加强的焊接空心球节点及其施工方法

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