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EP1649116A1 - Beam attachment system - Google Patents

Beam attachment system

Info

Publication number
EP1649116A1
EP1649116A1 EP04767562A EP04767562A EP1649116A1 EP 1649116 A1 EP1649116 A1 EP 1649116A1 EP 04767562 A EP04767562 A EP 04767562A EP 04767562 A EP04767562 A EP 04767562A EP 1649116 A1 EP1649116 A1 EP 1649116A1
Authority
EP
European Patent Office
Prior art keywords
tie rod
attachment system
tie
posts
post
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.)
Granted
Application number
EP04767562A
Other languages
German (de)
French (fr)
Other versions
EP1649116B1 (en
Inventor
Marc-Edouard Irigoyen
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 EP1649116A1 publication Critical patent/EP1649116A1/en
Application granted granted Critical
Publication of EP1649116B1 publication Critical patent/EP1649116B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
    • 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
    • E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
    • E04B2001/2466—Details of the elongated load-supporting parts
    • E04B2001/2472—Elongated load-supporting part formed from a number of parallel profiles
    • 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
    • E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
    • E04B2001/2487—Portico type structures
    • 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
    • E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
    • E04B2001/3583—Extraordinary methods of construction, e.g. lift-slab, jack-block using permanent tensioning means, e.g. cables or rods, to assemble or rigidify structures (not pre- or poststressing concrete), e.g. by tying them around the structure

Definitions

  • the present invention relates to a system for attaching a beam and, in particular, a long-span beam.
  • Beams and, in particular, long-span beams have many applications, in particular in the field of structures with large spans, for the construction of buildings and engineering structures. Examples of such structures are warehouses, hypermarkets, aircraft halls, sports centers, buildings on stilts or tall buildings, parking lots, bridges and walkways.
  • FR 2 611 781 discloses a system for ensuring the support and attachment of long-span beams. The attachment is done on metal support posts, each post being provided with at least one bracing leg articulated at its lower end on a hinge pin secured to the corresponding post.
  • the upper end of the bracing leg is provided with a receiving angle iron on which comes a bearing end-piece secured to the end of a long-span beam by means of contact parts, the provided with said tip.
  • the subject of the invention is a beam fastening system comprising two posts, a beam and at least one tie rod, in which the posts are biased apart by the beam and biased together by the tie rod.
  • the invention comprises one or more of the following characteristics: - the beam is connected to the tie rod; - The beam and the tie rod are mounted with relative sliding in a finite sliding portion; - sleeves mounted on the tie delimit the finished sliding portion; - The beam comprises at least two lateral parts between which a tie passage is formed; - the beam is supported by the tie; - The beam comprises several longitudinal segments; each of the posts is connected to the beam by means of a connecting rod, the connecting rod being articulated on the one hand to the post which it connects to the beam and on the other hand to the beam; - one of the posts is a shore post.
  • FIG. 1 a schematic illustration of the attachment system according to the invention
  • - Figure 2 a front view in section showing the upper part of a post connected to two beams via connecting rods
  • - Figure 3 a top view of the elements shown in Figure 2
  • - Figure 4 a partial front view of a tie fixed at the head of a post and at one end of a beam
  • - Figure 5 cross-sectional view of a beam, at a central section of the beam
  • - Figure 6 a partial sectional view, along a longitudinal section of the beam, at its central part
  • - Figure 7 a front view, representing a beam intended to be mounted in the attachment system
  • the invention provides a beam attachment system comprising two posts, a beam and at least one tie rod, in which the posts are biased apart by the beam and biased together by the tie rod.
  • FIG. 1 is a schematic illustration of the attachment system according to the invention.
  • the figure shows an edge post 14 as well as several posts 5a, 5b, beams 3a, 3b, 3c and tie rods 9a, 9b, 9c.
  • the posts 5a, 5b are embedded in the ground 4 (that is to say in the foundation) and form a metal frame intended for the attachment of the beams.
  • the general reference number 3 designates a beam
  • the number 9 designates a tie rod
  • the number 5 designates a structural pole other than an edge pole.
  • Letters of reference additional a, b, c denote different sections of the frame.
  • the beam attachment system 1 therefore comprises two posts 5a, 5b, a beam 3b and at least one tie rod 9b.
  • the beam is placed under stress and the tie connects at least one of the posts 5a, 5b, so that the two posts 5a, 5b are urged in spacing by the beam 3b and urged in approach by the tie 9b.
  • the stress by the tie 9b at least partially compensates for the moment exerted by a beam on the posts and also creates an increase in longitudinal stress in the beam.
  • FIG. 2 is a front view in section showing the upper part of a post connected to two beams via connecting rods.
  • the figure shows a post 5a, two beams 3a, 3b, a vertical setting 17, two connecting rods 13a, 13b, two distribution plates 19a, 19b and two tie rods 9a, 9b.
  • An element a of each pair of elements a, b above is located to the left of the post 5a, the other element being located to the right of the post.
  • the post 5a is embedded in the ground 4 in this example and, more particularly, in the foundation. According to a variant, it can be articulated on the foundation.
  • the post 5a is connected to the beams 3a, 3b by means of a connecting rod 13a, 13b articulated on the one hand to the post 5a which it connects to a beam and on the other hand to a beam 3a, 3b.
  • the articulation at the level of the post 5a can be achieved by means of a pivot link 14a, 14b or, as a variant, of an axis.
  • the articulation at the level of the beam can, for its part, be carried out by means of a support angle 18a, 18b.
  • a tip angle can then be articulated in the support angle 18a, 18b so as to form a pivot connection.
  • the end angle can be made in the form of a distribution plate 19a, 19b.
  • This plate fixed to a beam 3a, 3b makes it possible, on the one hand, to support this beam and, on the other hand, to distribute the reaction of the support in this beam 3.
  • Two tie rods 9a, 9b are fixed at the head of the post 5 a, left and right, respectively. According to a variant, only one tie rod is fixed at the head of the post 5a.
  • the same tie can then extend along a frame comprising several posts.
  • Such a structure has the advantage of distributing the stress forces, as well as the recovery of these forces, along the frame.
  • FIG. 3 is a top view of the elements shown in Figure 2.
  • Each of the beams 3a, 3b comprises two lateral parts, respectively referenced in Figure 3 under 3aG, 3aD, 3bG and 3bD.
  • the two side parts are assembled and connected by fastening elements 20a, 20b such as bolts. These fastening elements pass through a distribution plate 19a, 19b, as shown in FIG. 2.
  • a passage 15a, 15b is formed between two lateral parts, allowing a tie rod 9a, 9b to engage there.
  • the section of the half-beams can be designed so that after the assembly of the two half-beams, a passage 15a, 15b forms a channel allowing a tie rod 9a, 9b to engage there.
  • a tie 9a, 9b is thus at least partially retracted in a beam, which makes it possible to protect it, for example in the event of a fire.
  • two tie rods 9a, 9b are fixed at the head of the post 5a.
  • Figure 4 is a partial front view of a tie fixed at the head of a post and at one end of a beam. The figure shows a tie 9b, the head of a post 5a, a beam 3b and a tension member 23b of the tie 9b. This member 23b makes it possible to adjust the tension of the tie rod 9b, for example after the mounting of the beam 3b on the posts and of the tie rod with the beam.
  • Figure 5 is a cross-sectional view of a beam, at a central section of the beam.
  • This figure shows a beam 3 comprising two lateral parts (or half-beams) left and right 3G, 3D fixedly connected by fastening elements 20.
  • the figure also shows a part of post 5 and a connecting rod 13 articulated to the post 5 via a pivot link 14 and in contact with the beam 3 at a distribution plate 19 of the beam.
  • the fastening elements 20 pass through this plate 19.
  • the left 3G and right 3D lateral parts of the beam 3 form a passage 15 allowing a tie rod (not shown) to engage there. It should be noted that the tie passage 15 is as much less material in the beam.
  • the passage 15 frees up material and therefore lightens the beam 3.
  • the beam 3 is thus less subject to buckling caused by its own mass.
  • the retraction of the tie rod inside the passage 15 reduces the spatial size of the tie rod and makes it possible to protect the tie rod, for example, in the event of fire. If necessary, a flame retardant film can be attached so as to close the passage 15, in order to further protect the tie rod in the event of fire.
  • the passage 15 is formed so that the tie rod supports the beam at the center of gravity of the beam. A distribution plate 41 central of the beam rests on the tie rod 9.
  • This central plate 41 is crossed by fastening elements 40 fixedly connecting the two lateral parts 3 G, 3D of the beam via the central plate 41.
  • the passage 15 of the tie formed by the lateral parts 3G, 3D allows relative sliding of the beam relative to the tie.
  • This last property of the attachment system proves to be particularly advantageous when the beam 3 is subjected to an asymmetric load. This is for example the case when equipment such as air conditioning or heating equipment is fixed in abutment on the beam at a location remote from the center of the beam. In such a case, the additional degree of freedom offered by the relative sliding of the beam 3 with respect to the tie rod 9 makes it possible to reduce the potential energy linked to the load constraint.
  • the beam 3 is supported by the tie rod 9, the latter can also be connected to the tie rod according to various possible variants.
  • the tie can support the beam via a ring or an equivalent connecting member allowing the beam 3 to slide along the tie.
  • the tie rod is simply fixed to the beam, for example in the center of the upper surface of the beam. This variant makes it possible to simplify the manufacture of the fastening system 1. This gives a fastening system 1 in which the stressing of posts by a tie rod at least partially compensates for the moment exerted by the beam 3 on the posts and creates in addition, an increase in longitudinal stress in the beam 3.
  • tie rod can be made in two separate tie rod parts. One of these parts connects a post to the beam and the other of these parts connects the beam to another post. A tie-rod-beam-guyed structure is then obtained in which each of the two tie-rod parts at least partially compensates for the moment exerted by the beam on each of the poles.
  • FIG. 6 is a partial view in section, along a longitudinal section of the beam, at its central part. The figure shows the central part of a beam 3 comprising two lateral parts. The cut is made between these two side parts.
  • the tie rod 9 is engaged in the tie rod passage formed by the lateral parts of the beams and allows relative sliding of the beam 3 with respect to the tie rod 9.
  • the beam 3 and tie rod 9 are mounted with relative sliding in a finite sliding portion.
  • the sliding portion is delimited by two sleeves 43, 45 fixed on the tie rod 9.
  • the two lateral parts of beams are connected by a central distribution plate 41, pierced with several holes allowing the fixing of the plate 41 on the two lateral parts .
  • the central distribution plate can thus slide along the tie rod 9 and between the sleeves.
  • the difference between the finished sliding portion and the length of the distribution plate defines a sliding clearance, as illustrated in FIG. 6.
  • the distribution plates 19, 41 are themselves subdivided into two plates.
  • each of these two plates can be pre-assembled on a lateral part of a 3G, 3D beam.
  • the assembly phase of the beam 3 only requires assembly directly by fixing the lateral parts of the beam, for example by means of bolts.
  • the pre-assembly phase being a factory phase, it can be easily mastered. Any errors during the assembly of the beam are thus eliminated.
  • the assembly of the beam 3 on a site is thereby substantially simplified.
  • the sliding clearance is typically between 0.2 / 10000 5/10000 e and e of the span of the beam. This clearance is chosen so as to be largely below a threshold of instability of the attachment system, that is to say a threshold beyond which the sliding of the beam 3 threatens the stability of the system.
  • FIG. 7 shows a front view, showing a beam intended to be mounted in the attachment system.
  • the beam 3 is subdivided into three longitudinal segments 31, 32, 33.
  • the third segment 33 is similar to the first segment 31 but oriented symmetrically with respect to the central cross section of the beam 3.
  • Each of the segments ends in a recess at one, at least, of its ends, as shown in the figure, so that the assembly of the segments is facilitated.
  • the central segment 32 has a step such that it rests on the other two segments 31,33.
  • Fixing plates 34 consolidate the beam 3 at the level of the recesses.
  • the tie rod is made of steel or is derived from steel and has a modulus of elasticity of between 190,000 and 230,000 MPa.
  • the invention is however not limited to the variants described above but is susceptible of numerous other variations easily accessible to those skilled in the art. For example, one can consider splitting a beam into any odd number of longitudinal segments. An odd number of segments makes it possible to envisage a beam symmetrical with respect to its transverse, central section, the beam comprising a central segment resting on the tie rod. The number of segments can then be optimized so as to reduce the overall cost of mounting the attachment system.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Led Device Packages (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention relates to a beam attachment system (1) comprising two pillars (5a, 5b), a beam (3b) and at least one beam tie (9a, 9b). Said pillars are stressed by the beam (3b) in order to be moved away from each other and by the beam tie (9a, 9b) in order to be pulled towards each other.

Description

SYSTEME D'ACCROCHAGE DE POUTRE BEAM HANGING SYSTEM
La présente invention concerne un système d'accrochage de poutre et, notamment, de poutre de longue portée. Les poutres et, notamment, les poutres de longue portée connaissent de nombreuses applications, en particulier dans le domaine des structures de grandes portées, pour la construction de bâtiments et d'ouvrages d'art. Des exemples de telles structures sont les entrepôts, hypermarchés, halls d'avions, centres sportifs, immeubles sur pilotis ou de grande hauteur, parkings, ponts et passerelles. FR 2 611 781 divulgue un système permettant d'assurer l'appui et l'accrochage de poutres de longue portée. L'accrochage se fait sur des poteaux de support métalliques, chaque poteau étant muni d'au moins une jambe d'arc-boutement articulée à son extrémité inférieure sur un axe d'articulation solidaire du poteau correspondant. L'extrémité supérieure de la jambe d'arc-boutement est munie d'une cornière de réception sur laquelle vient porter un embout de coin solidaire de l'extrémité d'une poutre de longue portée par l'intermédiaire de pièces de contact dont est muni ledit embout. Grâce à ce système, la réaction verticale du poids de la poutre est transférée en effort d'arc-boutement dans l'axe de la jambe correspondante. Cet effort crée à son tour un effort horizontal de contrainte longitudinale dans la poutre correspondante de longue portée, destinée à supporter une structure. La réaction du poids de la poutre transférée en effort d'arc-boutement dans l'axe de la jambe sollicite en écartement les poteaux sur lesquels sont accrochées les poutres. On entend par-là que l'effort d'arc-boutement exerce un moment sur les poteaux. Lorsque l'on cherche à augmenter la portée de la poutre, une possibilité est d'augmenter la contrainte longitudinale dans la poutre. Or, un surcroît de contrainte dans la poutre entraîne un surcroît de moment, c'est-à-dire une contrainte supplémentaire exercée sur les poteaux. Ce surcroît de moment peut conduire à son tour à une déformation des poteaux telle qu'un flambement de flexion ou à une rupture lorsque le seuil de résistance en flexion du poteau est franchi. Une déformation de poteau menace la stabilité du système d'accrochage. A plus forte raison, une rupture d'une poutre n'est évidemment pas souhaitable. II existe donc un besoin pour un système d'accrochage de poutre qui permette d'augmenter la portée de la poutre et de préserver la stabilité du système. L'invention a pour objet un système d'accrochage de poutre comprenant deux poteaux, une poutre et au moins un tirant, dans lequel les poteaux sont sollicités en écartement par la poutre et sollicités en rapprochement par le tirant. Dans des modes de réalisation préférés, l'invention comprend une ou plusieurs des caractéristiques suivantes : - la poutre est reliée au tirant ; - la poutre et le tirant sont montés à coulissement relatif selon une portion finie de coulissement ; - des manchons montés sur le tirant délimitent la portion finie de coulissement ; - la poutre comprend au moins deux parties latérales entre lesquelles est formé un passage de tirant ; - la poutre est soutenue par le tirant ; - la poutre comprend plusieurs segments longitudinaux ; - chacun des poteaux est relié à la poutre par l'intermédiaire d'une bielle, la bielle étant articulée d'une part au poteau qu'elle relie à la poutre et d'autre part à la poutre ; - l'un des poteaux est un poteau de rive. D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui suit des modes de réalisation de l'invention, donnés à titre d'exemple uniquement et en références aux dessins annexés, qui montrent : - Figure 1 : une illustration schématique du système d'accrochage selon l'invention ; - Figure 2 : une vue de face et en coupe représentant la partie supérieure d'un poteau relié à deux poutres par l'intermédiaire de bielles ; - Figure 3 : une vue de dessus des éléments représentés sur la figure 2 ; - Figure 4 : une vue partielle, de face, d'un tirant fixé en tête d'un poteau et au niveau d'une extrémité d'une poutre ; - Figure 5 : vue en coupe transversale d'une poutre, au niveau d'une section centrale de la poutre ; - Figure 6 : une vue partielle et en coupe, le long d'une section longitudinale de la poutre, au niveau de sa partie centrale ; - Figure 7 : une vue de face, représentant une poutre destinée à être montée dans le système d'accrochage ; L'invention propose un système d'accrochage de poutre comprenant deux poteaux, une poutre et au moins un tirant, dans lequel les poteaux sont sollicités en écartement par la poutre et sollicités en rapprochement par le tirant. Le tirant compense au moins en partie la contrainte exercée par la poutre sur le poteau. Ce système permet d'allonger la portée de la poutre et de préserver la stabilité du système. La figure 1 est une illustration schématique du système d'accrochage selon l'invention. La figure montre un poteau de rive 14 ainsi que plusieurs poteaux 5a, 5b, des poutres 3a, 3b, 3c et des tirants 9a, 9b, 9c. Les poteaux 5a, 5b sont encastrés dans le sol 4 (c'est-à-dire dans la fondation) et forment une charpente métallique destinée à l'accrochage des poutres. Le numéro de référence général 3 désigne une poutre, le numéro 9 désigne un tirant et le numéro 5 désigne un poteau de charpente autre qu'un poteau de rive. Les lettres de références additionnelles a, b, c désignent différentes sections de la charpente. Une poutre est accrochée entre deux poteaux à l'aide de systèmes d'appui qui seront décrits plus loin. Le tirant est un élément du système destiné à résister à la traction. Il peut par exemple être fixé en tête d'un poteau et être réalisé sous la forme d'un câble ou d'un arbre tendu. Le système d'accrochage 1 de poutre selon l'invention comprend donc deux poteaux 5a, 5b, une poutre 3b et au moins un tirant 9b. La poutre est mise sous contrainte et le tirant relie au moins l'un des poteaux 5a, 5b, de sorte que les deux poteaux 5a, 5b sont sollicités en écartement par la poutre 3b et sollicités en rapprochement par le tirant 9b. La sollicitation par le tirant 9b compense au moins partiellement le moment exercé par une poutre sur les poteaux et crée en outre un surcroît de contrainte longitudinale dans la poutre. Ce système permet ainsi, d'une part, d'allonger la portée de la poutre et, d'autre part, de reprendre une partie de l'effort de contrainte exercé sur un poteau. Il permet donc également de préserver la stabilité du système. La figure 2 est une vue de face et en coupe représentant la partie supérieure d'un poteau relié à deux poutres par l'intermédiaire de bielles. La figure montre un poteau 5a, deux poutres 3a, 3b, un calage vertical 17, deux bielles 13a, 13b, deux plaques de répartition 19a, 19b et deux tirants 9a, 9b. Un élément a de chaque paire d'éléments a, b précitée se situe à gauche du poteau 5a, l'autre élément se situant à la droite du poteau. Le poteau 5a est encastré dans le sol 4 dans cet exemple et, plus particulièrement, dans la fondation. Selon une variante il peut être articulé sur la fondation. Le poteau 5 a est relié aux poutres 3 a, 3b par l'intermédiaire d'une bielle 13a, 13b articulée d'une part au poteau 5a qu'elle relie à une poutre et d'autre part à une poutre 3a, 3b. L'articulation au niveau du poteau 5a peut être réalisée au moyen d'une liaison pivot 14a, 14b ou, en variante, d'un axe. L'articulation au niveau de la poutre peut, elle, être réalisée au moyen d'une cornière de support 18a, 18b. Une cornière d'embout peut alors être articulée dans la cornière de support 18a, 18b de sorte à former une liaison pivot. Par exemple, la cornière d'embout peut être réalisée sous la forme d'une plaque de répartition 19a, 19b. Cette plaque fixée à une poutre 3a, 3b permet, d'une part, de supporter cette poutre et, d'autre part, de répartir la réaction du support dans cette poutre 3. Deux tirants 9a, 9b sont fixés en tête du poteau 5 a, à gauche et à droite, respectivement. Selon une variante, seul un tirant est fixé en tête du poteau 5a. Un même tirant peut alors s'étendre le long d'une charpente comprenant plusieurs poteaux. Une telle structure présente l'avantage de répartir les efforts de contraintes, ainsi que la reprise de ces efforts, le long de la charpente. Il s'ensuit une meilleure cohésion de la charpente. Les tirants sont au moins partiellement escamotés dans la poutre, comme il sera décrit plus loin. Un calage 17 des deux poutres, en tête du poteau 5a, peut en outre être assuré par deux éléments de calage, situés de part et d'autre des poutres. Ceci sera mieux décrit en référence à la figure 3. La figure 3 est une vue de dessus des éléments représentés sur la figure 2. Chacune des poutres 3 a, 3b comprend deux parties latérales, respectivement référencés sur la figure 3 sous 3aG, 3aD, 3bG et 3bD. Les deux parties latérales sont assemblées et reliées par des éléments de fixation 20a, 20b tels que des boulons. Ces éléments de fixation traversent une plaque de répartition 19a, 19b, telle que représentées sur la figure 2. Ces plaques sont cependant occultées par un tirant 9a, 9b et ne sont donc pas visibles sur la figure 3. Les parties latérales 3aG, 3aD, 3bG, 3bD sont enserrées au niveau de leur tête par les deux éléments de calage 17G, 17D, lesquels peuvent ainsi empêcher le déversement des poutres. D'autres éléments fixation 16 assurent le maintien des éléments de calage 17 enserrant la tête des poutres 3 a, 3b. Un passage 15a, 15b est formé entre deux parties latérales, permettant à un tirant 9a, 9b de s'y engager. La section des demi-poutres peut être conçue de telle sorte qu'après l'assemblage des deux demi-poutres, un passage 15a, 15b forme une rigole permettant à un tirant 9a, 9b de s'y engager. Un tirant 9a, 9b est ainsi au moins partiellement escamoté dans une poutre, ce qui permet de le protéger, par exemple en cas d'incendie. Dans le mode de réalisation représenté sur la figure 3, deux tirants 9a, 9b sont fixés en tête du poteau 5a. La figure 4 est une vue partielle, de face, d'un tirant fixé en tête d'un poteau et au niveau d'une extrémité d'une poutre. La figure montre un tirant 9b, la tête d'un poteau 5a, une poutre 3b ainsi qu'un organe de tension 23b du tirant 9b. Cet organe 23b permet d'ajuster la tension du tirant 9b, par exemple après le montage de la poutre 3b sur les poteaux et du tirant avec la poutre. La figure 5 est une vue en coupe transversale d'une poutre, au niveau d'une section centrale de la poutre. Cette figure montre une poutre 3 comprenant deux parties latérales (ou demi-poutres) gauche et droite 3G, 3D reliées fixement par des éléments de fixation 20. La figure montre également une partie de poteau 5 et une bielle 13 articulée au poteau 5 via une liaison pivot 14 et en contact avec la poutre 3 au niveau d'une plaque de répartition 19 de la poutre. Les éléments de fixation 20 traversent cette plaque 19. Les parties latérales gauche 3G et droite 3D de la poutre 3 forment un passage 15 permettant à un tirant (non représenté) de s'y engager. Il convient de noter que le passage 15 de tirant est autant de matériau en moins dans la poutre. Outre ce qu'il permet au tirant d'être engagé à l'intérieur de la poutre pour la soutenir, le passage 15 libère de la matière et allège donc la poutre 3. La poutre 3 est ainsi moins sujette au flambage causé par sa propre masse. En outre, l'escamotage du tirant à l'intérieur du passage 15 diminue l'encombrement spatial du tirant et permet de protéger le tirant, par exemple, en cas d'incendie. Au besoin, un film ignifuge peut être fixé de sorte à fermer le passage 15, afin de protéger davantage le tirant en cas d'incendie. Dans un mode de réalisation, le passage 15 est formé de sorte que le tirant viennent soutenir la poutre au niveau du centre de gravité de la poutre. Une plaque de répartition 41 centrale de la poutre repose sur le tirant 9. Cette plaque 41 centrale est traversée par des éléments de fixation 40 reliant fixement les deux parties latérales 3 G, 3D de poutre via la plaque 41 centrale. De plus, le passage 15 de tirant formé par les parties latérales 3G, 3D permet un coulissement relatif de la poutre par rapport au tirant. Une telle caractéristique permet à la poutre 3 de s'ajuster naturellement par rapport au tirant 9. Cette dernière propriété du système d'accrochage se révèle particulièrement avantageuse lorsque la poutre 3 est soumise à une charge dissymétrique. Ceci est par exemple le cas lorsque des équipements tels que des équipements de climatisation ou de chauffage sont fixés en appui sur la poutre en un endroit éloigné du centre de la poutre. Dans un tel cas, le degré de liberté supplémentaire offert par le coulissement relatif de la poutre 3 par rapport au tirant 9 permet de réduire l'énergie potentielle liée à la contrainte de charge. Une telle propriété permet donc de stabiliser davantage le système d'accrochage. II convient toutefois de noter que si dans le présent mode de réalisation, la poutre 3 est soutenue par le tirant 9, celle-ci peut également être reliée au tirant selon diverses variantes possibles. Selon une variante, le tirant peut soutenir la poutre par l'intermédiaire d'un anneau ou d'un organe de liaison équivalent permettant à la poutre 3 de coulisser le long du tirant. Selon une autre variante, le tirant est simplement fixé à la poutre, par exemple au centre de la surface supérieure de la poutre. Cette variante permet de simplifier la fabrication du système d'accrochage 1. On obtient ce-faisant un système d'accrochage 1 dans lequel la sollicitation de poteaux par un tirant compense au moins partiellement le moment exercé par la poutre 3 sur les poteaux et crée en outre un surcroît de contrainte longitudinale dans la poutre 3. Un tel système d'accrochage bénéficie d'une grande simplicité de montage, permet d'allonger la portée de la poutre et de reprendre une partie de l'effort de contrainte exercé sur un poteau. Le fait que le tirant relie la poutre 3 permet en outre de stabiliser l'ensemble poutre - poteaux du système d'accrochage. Selon une autre variante, le tirant peut être réalisé en deux parties de tirants distinctes. L'une de ces parties relie un poteau à la poutre et l'autre de ces parties relie la poutre à un autre poteau. Il est alors obtenu une structure tirant - poteaux - poutre de type haubané dans laquelle chacune des deux parties de tirants compense au moins partiellement le moment exercé par la poutre sur chacun des poteaux. Par ailleurs, il a été mentionné plus haut que le degré de liberté supplémentaire offert par le coulissement relatif de la poutre 3 par rapport au tirant 9 permettait de réduire l'énergie potentielle liée à la contrainte de charge et de stabiliser davantage le système d'accrochage. Cependant, il est possible de limiter le coulissement relatif de la poutre par rapport au tirant, afin de prévenir une instabilité du système d'accrochage. A cette fin, un manchon 43 fixé sur le tirant 9 limite le coulissement de la poutre par rapport au tirant. Ceci sera mieux décrit en référence à la figure 6. La figure 6 est une vue partielle et en coupe, le long d'une section longitudinale de la poutre, au niveau de sa partie centrale. La figure montre la partie centrale d'une poutre 3 comprenant deux parties latérales. La coupe est réalisée entre ces deux parties latérales. Le tirant 9 est engagé dans le passage de tirant formé par les parties latérales de poutres et permet un coulissement relatif de la poutre 3 par rapport au tirant 9. Dans un mode de réalisation, illustré à titre d'exemple sur la figure 6, la poutre 3 et le tirant 9 sont montés à coulissement relatif selon une portion finie de coulissement. La portion de glissement est délimitée par deux manchons 43, 45 fixés sur le tirant 9. Les deux parties latérales de poutres sont reliées par une plaque de répartition 41 centrale, percée de plusieurs trous permettant la fixation de la plaque 41 sur les deux parties latérales. La plaque de répartition centrale peut ainsi coulisser le long du tirant 9 et entre les manchons. La différence entre la portion finie de coulissement et la longueur de la plaque de répartition définit un jeu de coulissement, comme illustré sur la figure 6. Selon une variante, les plaques de répartition 19, 41 se subdivisent elles-mêmes en deux plaques. Chacune de ces deux plaques peut être pré-assemblée sur une partie latérale de poutre 3G, 3D. Ainsi, la phase d'assemblage de la poutre 3 ne nécessite plus que l'assemblage directement par fixation des parties latérales de poutre, par exemple au moyen de boulons. D'autre part, la phase de pré-assemblage étant une phase d'usine, elle peut être facilement maîtrisée. Des erreurs éventuelles lors de l'assemblage de la poutre sont ainsi écartées. L'assemblage de la poutre 3 sur un chantier s'en trouve substantiellement simplifié. Le jeu de coulissement est typiquement compris entre 0,2/10000e et 5/10000e de la portée de la poutre. Ce jeu est choisi de sorte à être largement inférieur à un seuil d'instabilité du système d'accrochage, c'est-à-dire un seuil au-delà duquel le coulissement de la poutre 3 menace la stabilité du système. Une telle caractéristique permet à la poutre 3, articulée par ailleurs à des bielles, de s'ajuster par rapport au tirant 9, à l'intérieur d'une portion de coulissement délimitée. Ainsi, lorsque la poutre 3 est soumise à une charge dissymétrique, le degré de liberté supplémentaire fourni par le coulissement relatif de la poutre 3 par rapport au tirant permet de réduire l'énergie potentielle liée à la contrainte de charge. Une telle propriété permet de stabiliser le système d'accrochage, comme décrit ci-avant. Pour autant, le coulissement s'effectue à l'intérieur d'une portion de coulissement finie (délimitée par des manchons), afin d'éviter que la poutre ne coulisse au-delà du seuil d'instabilité du système d'accrochage. La figure 7 montre une vue de face, représentant une poutre destinée à être montée dans le système d'accrochage. La poutre 3 se subdivise en trois segments longitudinaux 31,32,33. Le troisième segment 33 est semblable au premier segment 31 mais orienté de façon symétrique par rapport à la section transversale, centrale de la poutre 3. Chacun des segments se termine par un décrochement à l'une, au moins, de ses extrémités, comme représenté sur la figure, de sorte que l'assemblage des segments soit facilité. De préférence, le segment central 32 présente un décrochement tel qu'il repose sur les deux autres segments 31,33. Des plaques de fixation 34 viennent consolider la poutre 3 au niveau des décrochements. Pris séparément, ces segments 31,32,33 sont plus maniables qu'une poutre d'un seul tenant, ce qui simplifie considérablement la logistique relative à la livraison du système d'accrochage sur un chantier. En outre, l'utilisation de segments permet de ne pas avoir à recourir à un transport exceptionnel et, donc, de réduire le coût de revient d'une poutre assemblée. On peut, au besoin, prévoir autant de segments de poutres qu'il est nécessaire pour ne pas avoir à recourir à un transport exceptionnel. Une telle conception de système d'accrochage, selon l'invention, permet d'envisager la réalisation de poutres de longueur allant de 5 à 120 m. Il est, en fait, théoriquement possible de réaliser des poutres de longueurs supérieures à 120 m, dans un système d'accrochage selon l'invention, en adaptant les dimensions générales des poutres et des poteaux. Parmi les longueurs de poutres typiquement envisagées dans le système d'accrochage selon l'invention, on peut citer les longueurs suivantes : 18, 24, 30, 35, 40, 55 et 70 m. Le matériau utilisé pour la poutre est du lamellé-collé. En variante, on peut utiliser un profil d'acier reconstitué soudé. Typiquement, le tirant est en acier ou est dérivé de l'acier et présente un module d'élasticité compris entre 190.000 et 230.000 MPa. L'invention n'est cependant pas limitée aux variantes décrites ci-avant mais est susceptible de nombreuses autres variations aisément accessibles à l'homme du métier. Par exemple, on peut envisager de scinder une poutre en un nombre impair quelconque de segments longitudinaux. Un nombre impair de segments permet d'envisager une poutre symétrique par rapport à sa section transversale, centrale, la poutre comprenant un segment central reposant sur le tirant. Le nombre de segments peut ensuite être optimisé de sorte à réduire le coût global de montage du système d'accrochage. The present invention relates to a system for attaching a beam and, in particular, a long-span beam. Beams and, in particular, long-span beams have many applications, in particular in the field of structures with large spans, for the construction of buildings and engineering structures. Examples of such structures are warehouses, hypermarkets, aircraft halls, sports centers, buildings on stilts or tall buildings, parking lots, bridges and walkways. FR 2 611 781 discloses a system for ensuring the support and attachment of long-span beams. The attachment is done on metal support posts, each post being provided with at least one bracing leg articulated at its lower end on a hinge pin secured to the corresponding post. The upper end of the bracing leg is provided with a receiving angle iron on which comes a bearing end-piece secured to the end of a long-span beam by means of contact parts, the provided with said tip. Thanks to this system, the vertical reaction of the weight of the beam is transferred in bracing effort in the axis of the corresponding leg. This force in turn creates a horizontal force of longitudinal stress in the corresponding long-span beam, intended to support a structure. The reaction of the weight of the beam transferred in bracing effort in the axis of the leg biases the posts on which the beams are hung. By this is meant that the bracing effort exerts a moment on the posts. When trying to increase the span of the beam, one possibility is to increase the longitudinal stress in the beam. However, an additional stress in the beam causes an additional moment, that is to say an additional stress exerted on the posts. This additional moment can in turn lead to a deformation of the posts such as a bending buckling or to a rupture when the bending resistance threshold of the post is crossed. Post deformation threatens the stability of the attachment system. A fortiori, a rupture of a beam is obviously not desirable. There is therefore a need for a beam attachment system which makes it possible to increase the span of the beam and to preserve the stability of the system. The subject of the invention is a beam fastening system comprising two posts, a beam and at least one tie rod, in which the posts are biased apart by the beam and biased together by the tie rod. In preferred embodiments, the invention comprises one or more of the following characteristics: - the beam is connected to the tie rod; - The beam and the tie rod are mounted with relative sliding in a finite sliding portion; - sleeves mounted on the tie delimit the finished sliding portion; - The beam comprises at least two lateral parts between which a tie passage is formed; - the beam is supported by the tie; - The beam comprises several longitudinal segments; each of the posts is connected to the beam by means of a connecting rod, the connecting rod being articulated on the one hand to the post which it connects to the beam and on the other hand to the beam; - one of the posts is a shore post. Other characteristics and advantages of the invention will appear on reading the detailed description which follows of embodiments of the invention, given by way of example only and with reference to the appended drawings, which show: - Figure 1: a schematic illustration of the attachment system according to the invention; - Figure 2: a front view in section showing the upper part of a post connected to two beams via connecting rods; - Figure 3: a top view of the elements shown in Figure 2; - Figure 4: a partial front view of a tie fixed at the head of a post and at one end of a beam; - Figure 5: cross-sectional view of a beam, at a central section of the beam; - Figure 6: a partial sectional view, along a longitudinal section of the beam, at its central part; - Figure 7: a front view, representing a beam intended to be mounted in the attachment system; The invention provides a beam attachment system comprising two posts, a beam and at least one tie rod, in which the posts are biased apart by the beam and biased together by the tie rod. The tie compensates at least partially the stress exerted by the beam on the post. This system lengthens the span of the beam and preserves the stability of the system. Figure 1 is a schematic illustration of the attachment system according to the invention. The figure shows an edge post 14 as well as several posts 5a, 5b, beams 3a, 3b, 3c and tie rods 9a, 9b, 9c. The posts 5a, 5b are embedded in the ground 4 (that is to say in the foundation) and form a metal frame intended for the attachment of the beams. The general reference number 3 designates a beam, the number 9 designates a tie rod and the number 5 designates a structural pole other than an edge pole. Letters of reference additional a, b, c denote different sections of the frame. A beam is hung between two posts using support systems which will be described later. The tie rod is an element of the system intended to resist traction. It can for example be fixed at the head of a post and be made in the form of a cable or a tensioned tree. The beam attachment system 1 according to the invention therefore comprises two posts 5a, 5b, a beam 3b and at least one tie rod 9b. The beam is placed under stress and the tie connects at least one of the posts 5a, 5b, so that the two posts 5a, 5b are urged in spacing by the beam 3b and urged in approach by the tie 9b. The stress by the tie 9b at least partially compensates for the moment exerted by a beam on the posts and also creates an increase in longitudinal stress in the beam. This system thus makes it possible, on the one hand, to extend the span of the beam and, on the other hand, to take up part of the stress force exerted on a post. It therefore also makes it possible to preserve the stability of the system. Figure 2 is a front view in section showing the upper part of a post connected to two beams via connecting rods. The figure shows a post 5a, two beams 3a, 3b, a vertical setting 17, two connecting rods 13a, 13b, two distribution plates 19a, 19b and two tie rods 9a, 9b. An element a of each pair of elements a, b above is located to the left of the post 5a, the other element being located to the right of the post. The post 5a is embedded in the ground 4 in this example and, more particularly, in the foundation. According to a variant, it can be articulated on the foundation. The post 5a is connected to the beams 3a, 3b by means of a connecting rod 13a, 13b articulated on the one hand to the post 5a which it connects to a beam and on the other hand to a beam 3a, 3b. The articulation at the level of the post 5a can be achieved by means of a pivot link 14a, 14b or, as a variant, of an axis. The articulation at the level of the beam can, for its part, be carried out by means of a support angle 18a, 18b. A tip angle can then be articulated in the support angle 18a, 18b so as to form a pivot connection. For example, the end angle can be made in the form of a distribution plate 19a, 19b. This plate fixed to a beam 3a, 3b makes it possible, on the one hand, to support this beam and, on the other hand, to distribute the reaction of the support in this beam 3. Two tie rods 9a, 9b are fixed at the head of the post 5 a, left and right, respectively. According to a variant, only one tie rod is fixed at the head of the post 5a. The same tie can then extend along a frame comprising several posts. Such a structure has the advantage of distributing the stress forces, as well as the recovery of these forces, along the frame. This results in better cohesion of the frame. The tie rods are at least partially retracted into the beam, as will be described later. Wedging 17 of the two beams, at the head of the post 5a, can also be ensured by two wedging elements, located on either side of the beams. This will be better described with reference to Figure 3. Figure 3 is a top view of the elements shown in Figure 2. Each of the beams 3a, 3b comprises two lateral parts, respectively referenced in Figure 3 under 3aG, 3aD, 3bG and 3bD. The two side parts are assembled and connected by fastening elements 20a, 20b such as bolts. These fastening elements pass through a distribution plate 19a, 19b, as shown in FIG. 2. These plates are however concealed by a tie rod 9a, 9b and are therefore not visible in FIG. 3. The lateral parts 3aG, 3aD, 3bG, 3bD are clamped at their head by the two wedging elements 17G, 17D, which can thus prevent the spilling of the beams. Other fixing elements 16 maintain the wedging elements 17 enclosing the head of the beams 3 a, 3b. A passage 15a, 15b is formed between two lateral parts, allowing a tie rod 9a, 9b to engage there. The section of the half-beams can be designed so that after the assembly of the two half-beams, a passage 15a, 15b forms a channel allowing a tie rod 9a, 9b to engage there. A tie 9a, 9b is thus at least partially retracted in a beam, which makes it possible to protect it, for example in the event of a fire. In the embodiment shown in Figure 3, two tie rods 9a, 9b are fixed at the head of the post 5a. Figure 4 is a partial front view of a tie fixed at the head of a post and at one end of a beam. The figure shows a tie 9b, the head of a post 5a, a beam 3b and a tension member 23b of the tie 9b. This member 23b makes it possible to adjust the tension of the tie rod 9b, for example after the mounting of the beam 3b on the posts and of the tie rod with the beam. Figure 5 is a cross-sectional view of a beam, at a central section of the beam. This figure shows a beam 3 comprising two lateral parts (or half-beams) left and right 3G, 3D fixedly connected by fastening elements 20. The figure also shows a part of post 5 and a connecting rod 13 articulated to the post 5 via a pivot link 14 and in contact with the beam 3 at a distribution plate 19 of the beam. The fastening elements 20 pass through this plate 19. The left 3G and right 3D lateral parts of the beam 3 form a passage 15 allowing a tie rod (not shown) to engage there. It should be noted that the tie passage 15 is as much less material in the beam. In addition to allowing the tie rod to be engaged inside the beam to support it, the passage 15 frees up material and therefore lightens the beam 3. The beam 3 is thus less subject to buckling caused by its own mass. In addition, the retraction of the tie rod inside the passage 15 reduces the spatial size of the tie rod and makes it possible to protect the tie rod, for example, in the event of fire. If necessary, a flame retardant film can be attached so as to close the passage 15, in order to further protect the tie rod in the event of fire. In one embodiment, the passage 15 is formed so that the tie rod supports the beam at the center of gravity of the beam. A distribution plate 41 central of the beam rests on the tie rod 9. This central plate 41 is crossed by fastening elements 40 fixedly connecting the two lateral parts 3 G, 3D of the beam via the central plate 41. In addition, the passage 15 of the tie formed by the lateral parts 3G, 3D allows relative sliding of the beam relative to the tie. Such a characteristic allows the beam 3 to adjust naturally with respect to the tie 9. This last property of the attachment system proves to be particularly advantageous when the beam 3 is subjected to an asymmetric load. This is for example the case when equipment such as air conditioning or heating equipment is fixed in abutment on the beam at a location remote from the center of the beam. In such a case, the additional degree of freedom offered by the relative sliding of the beam 3 with respect to the tie rod 9 makes it possible to reduce the potential energy linked to the load constraint. Such a property therefore makes it possible to further stabilize the attachment system. It should however be noted that if in the present embodiment, the beam 3 is supported by the tie rod 9, the latter can also be connected to the tie rod according to various possible variants. Alternatively, the tie can support the beam via a ring or an equivalent connecting member allowing the beam 3 to slide along the tie. According to another variant, the tie rod is simply fixed to the beam, for example in the center of the upper surface of the beam. This variant makes it possible to simplify the manufacture of the fastening system 1. This gives a fastening system 1 in which the stressing of posts by a tie rod at least partially compensates for the moment exerted by the beam 3 on the posts and creates in addition, an increase in longitudinal stress in the beam 3. Such a fastening system benefits from great simplicity of assembly, makes it possible to extend the span of the beam and to take up part of the stress force exerted on a post. The fact that the tie connects the beam 3 also makes it possible to stabilize the beam - column assembly of the attachment system. According to another variant, the tie rod can be made in two separate tie rod parts. One of these parts connects a post to the beam and the other of these parts connects the beam to another post. A tie-rod-beam-guyed structure is then obtained in which each of the two tie-rod parts at least partially compensates for the moment exerted by the beam on each of the poles. Furthermore, it was mentioned above that the additional degree of freedom offered by the relative sliding of the beam 3 relative to the tie rod 9 made it possible to reduce the potential energy linked to the load stress and to further stabilize the system. hanging. However, it is possible to limit the relative sliding of the beam relative to the tie rod, to prevent instability of the attachment system. To this end, a sleeve 43 fixed on the tie rod 9 limits the sliding of the beam relative to the tie rod. This will be better described with reference to Figure 6. Figure 6 is a partial view in section, along a longitudinal section of the beam, at its central part. The figure shows the central part of a beam 3 comprising two lateral parts. The cut is made between these two side parts. The tie rod 9 is engaged in the tie rod passage formed by the lateral parts of the beams and allows relative sliding of the beam 3 with respect to the tie rod 9. In one embodiment, illustrated by way of example in FIG. 6, the beam 3 and tie rod 9 are mounted with relative sliding in a finite sliding portion. The sliding portion is delimited by two sleeves 43, 45 fixed on the tie rod 9. The two lateral parts of beams are connected by a central distribution plate 41, pierced with several holes allowing the fixing of the plate 41 on the two lateral parts . The central distribution plate can thus slide along the tie rod 9 and between the sleeves. The difference between the finished sliding portion and the length of the distribution plate defines a sliding clearance, as illustrated in FIG. 6. According to a variant, the distribution plates 19, 41 are themselves subdivided into two plates. Each of these two plates can be pre-assembled on a lateral part of a 3G, 3D beam. Thus, the assembly phase of the beam 3 only requires assembly directly by fixing the lateral parts of the beam, for example by means of bolts. On the other hand, the pre-assembly phase being a factory phase, it can be easily mastered. Any errors during the assembly of the beam are thus eliminated. The assembly of the beam 3 on a site is thereby substantially simplified. The sliding clearance is typically between 0.2 / 10000 5/10000 e and e of the span of the beam. This clearance is chosen so as to be largely below a threshold of instability of the attachment system, that is to say a threshold beyond which the sliding of the beam 3 threatens the stability of the system. Such a characteristic allows the beam 3, articulated moreover to connecting rods, to adjust relative to the tie rod 9, inside a delimited sliding portion. Thus, when the beam 3 is subjected to an asymmetric load, the additional degree of freedom provided by the relative sliding of the beam 3 relative to the tie rod makes it possible to reduce the potential energy linked to the load stress. Such a property makes it possible to stabilize the attachment system, as described above. However, the sliding takes place inside a finished sliding portion (delimited by sleeves), in order to prevent the beam from sliding beyond the instability threshold of the attachment system. Figure 7 shows a front view, showing a beam intended to be mounted in the attachment system. The beam 3 is subdivided into three longitudinal segments 31, 32, 33. The third segment 33 is similar to the first segment 31 but oriented symmetrically with respect to the central cross section of the beam 3. Each of the segments ends in a recess at one, at least, of its ends, as shown in the figure, so that the assembly of the segments is facilitated. Preferably, the central segment 32 has a step such that it rests on the other two segments 31,33. Fixing plates 34 consolidate the beam 3 at the level of the recesses. Taken separately, these segments 31, 32, 33 are more manageable than a one-piece beam, which considerably simplifies the logistics relating to the delivery of the attachment system on a site. In addition, the use of segments makes it possible not to have to resort to exceptional transport and, therefore, to reduce the cost price of an assembled beam. We can, if necessary, provide as many beam segments as necessary so as not to have to resort to exceptional transport. Such a design of a fastening system according to the invention makes it possible to envisage the production of beams of length ranging from 5 to 120 m. It is, in fact, theoretically possible to produce beams of lengths greater than 120 m, in a fastening system according to the invention, by adapting the general dimensions of the beams and columns. Among the lengths of beams typically envisaged in the attachment system according to the invention, mention may be made of the following lengths: 18, 24, 30, 35, 40, 55 and 70 m. The material used for the beam is glulam. Alternatively, a welded reconstituted steel profile can be used. Typically, the tie rod is made of steel or is derived from steel and has a modulus of elasticity of between 190,000 and 230,000 MPa. The invention is however not limited to the variants described above but is susceptible of numerous other variations easily accessible to those skilled in the art. For example, one can consider splitting a beam into any odd number of longitudinal segments. An odd number of segments makes it possible to envisage a beam symmetrical with respect to its transverse, central section, the beam comprising a central segment resting on the tie rod. The number of segments can then be optimized so as to reduce the overall cost of mounting the attachment system.

Claims

REVENDICATIONS
1. Système d'accrochage (1) de poutre comprenant : - deux poteaux (5, 5a, 5b) ; - une poutre (3, 3a, 3b) ; et - au moins un tirant (9, 9a, 9b) ; les poteaux étant sollicités en écartement par la poutre (3, 3a, 3b) et sollicités en rapprochement par le tirant (9, 9a, 9b).1. Hanging system (1) of beam comprising: - two posts (5, 5a, 5b); - a beam (3, 3a, 3b); and - at least one tie (9, 9a, 9b); the posts being urged in spacing by the beam (3, 3a, 3b) and urged in approach by the tie rod (9, 9a, 9b).
2. Le système d'accrochage (1) selon la revendication 1, dans lequel la poutre (3, 3a, 3b) est reliée au tirant (9, 9a, 9b).2. The attachment system (1) according to claim 1, wherein the beam (3, 3a, 3b) is connected to the tie rod (9, 9a, 9b).
3. Le système d'accrochage (1) selon la revendication 2, dans lequel la poutre (3, 3a, 3b) et le tirant (9, 9a, 9b) sont montés à coulissement relatif selon une portion finie de coulissement.3. The attachment system (1) according to claim 2, wherein the beam (3, 3a, 3b) and the tie rod (9, 9a, 9b) are mounted with relative sliding in a finite sliding portion.
4. Le système d'accrochage (1) selon la revendication 3, dans lequel des manchons (43,45) montés sur le tirant (9, 9a, 9b) délimitent la portion finie de coulissement.4. The attachment system (1) according to claim 3, wherein sleeves (43,45) mounted on the tie rod (9, 9a, 9b) delimit the finished sliding portion.
5. Le système d'accrochage (1) selon l'une quelconque des revendications 2 à 4, dans lequel la poutre (3, 3a, 3b) comprend au moins deux parties latérales (3G,3D) entre lesquelles est formé un passage (15) de tirant.5. The attachment system (1) according to any one of claims 2 to 4, in which the beam (3, 3a, 3b) comprises at least two lateral parts (3G, 3D) between which a passage is formed ( 15).
6. Le système d'accrochage (1) selon l'une quelconque des revendications 2 à 5, dans lequel la poutre (3, 3a, 3b) est soutenue par le tirant (9, 9a, 9b).6. The attachment system (1) according to any one of claims 2 to 5, wherein the beam (3, 3a, 3b) is supported by the tie rod (9, 9a, 9b).
7. Le système d'accrochage (1) selon l'une quelconque des revendications 2 à 6, dans lequel la poutre (3, 3a, 3b) comprend plusieurs segments longitudinaux (31,32,33).7. The attachment system (1) according to any one of claims 2 to 6, wherein the beam (3, 3a, 3b) comprises several longitudinal segments (31,32,33).
8. Le système d'accrochage (1) selon l'une quelconque des revendications 2 à 7, dans chacun des poteaux (5 ,5a, 5b) est relié à la poutre (3, 3a, 3b) par l'intermédiaire d'une bielle (13a, 13b), la bielle étant articulée d'une part au poteau (5 ,5a, 5b) qu'elle relie à la poutre et d'autre part à la poutre (3, 3a, 3b).8. The attachment system (1) according to any one of claims 2 to 7, in each of the posts (5, 5a, 5b) is connected to the beam (3, 3a, 3b) via a connecting rod (13a, 13b), the connecting rod being articulated on the one hand to the post (5, 5a, 5b) which it connects to the beam and on the other hand to the beam (3, 3a, 3b).
9. Le système d'accrochage (1) selon l'une quelconque des revendications précédentes, dans lequel l'un des poteaux (5 ,5a, 5b) est un poteau de rive (14). 9. The attachment system (1) according to any one of the preceding claims, in which one of the posts (5, 5a, 5b) is an edge post (14).
0. Le système d'accrochage (1) selon l'une quelconque des revendications précédentes, dans lequel la poutre (3, 3a, 3b) comprend un matériau lamellé-collé et/ou un profil d'acier reconstitué soudé. 0. The attachment system (1) according to any one of the preceding claims, in which the beam (3, 3a, 3b) comprises a glued laminated material and / or a profile of welded reconstituted steel.
EP04767562A 2003-07-03 2004-07-02 Beam attachment system Expired - Lifetime EP1649116B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0308093A FR2857038B1 (en) 2003-07-03 2003-07-03 BEAM ATTACHMENT SYSTEM
PCT/FR2004/001722 WO2005012665A1 (en) 2003-07-03 2004-07-02 Beam attachment system

Publications (2)

Publication Number Publication Date
EP1649116A1 true EP1649116A1 (en) 2006-04-26
EP1649116B1 EP1649116B1 (en) 2008-05-07

Family

ID=33522714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04767562A Expired - Lifetime EP1649116B1 (en) 2003-07-03 2004-07-02 Beam attachment system

Country Status (9)

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US (1) US20070028551A1 (en)
EP (1) EP1649116B1 (en)
CN (1) CN100557153C (en)
AT (1) ATE394553T1 (en)
CA (1) CA2530559C (en)
DE (1) DE602004013594D1 (en)
FR (1) FR2857038B1 (en)
NO (1) NO20060015L (en)
WO (1) WO2005012665A1 (en)

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EP2340337A1 (en) * 2008-05-28 2011-07-06 Marc Irigoyen Beam attachment system with cam-shaped receiving angle
EP2427604B1 (en) * 2009-05-04 2017-02-22 ArcelorMittal Fire resistant steel structure
JP6779038B2 (en) * 2016-06-01 2020-11-04 キヤノン株式会社 Image sensor and its control method, image sensor and its control method
FR3135473B1 (en) 2022-05-12 2024-04-26 Sermeca Stephanoise Corner connection device for industrial buildings with movable perimeter cladding equipped with beams equipped with a runway
FR3135472B1 (en) 2022-05-12 2024-04-19 Sermeca Stephanoise Device for increasing the spans of beams for industrial buildings with mobile perimeter cladding
CN115182450B (en) * 2022-09-08 2023-01-13 中铁十九局集团第三工程有限公司 But reuse and have buffer function's steel material bearing structure

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Also Published As

Publication number Publication date
WO2005012665A1 (en) 2005-02-10
US20070028551A1 (en) 2007-02-08
FR2857038B1 (en) 2007-03-30
ATE394553T1 (en) 2008-05-15
FR2857038A1 (en) 2005-01-07
EP1649116B1 (en) 2008-05-07
CA2530559A1 (en) 2005-02-10
NO20060015L (en) 2006-02-02
DE602004013594D1 (en) 2008-06-19
CN1833079A (en) 2006-09-13
CN100557153C (en) 2009-11-04
CA2530559C (en) 2012-09-11

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