FR2627210A1 - Pre-stressed joint esp. for plywood beam - comprises cylindrical elements with holes for tensioned steel wires - Google Patents

Pre-stressed joint esp. for plywood beam - comprises cylindrical elements with holes for tensioned steel wires Download PDF

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Publication number
FR2627210A1
FR2627210A1 FR8801732A FR8801732A FR2627210A1 FR 2627210 A1 FR2627210 A1 FR 2627210A1 FR 8801732 A FR8801732 A FR 8801732A FR 8801732 A FR8801732 A FR 8801732A FR 2627210 A1 FR2627210 A1 FR 2627210A1
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France
Prior art keywords
cylindrical elements
beams
holes
joint
steel wires
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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.)
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Application number
FR8801732A
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French (fr)
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Individual
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Individual
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Publication date
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Priority to FR8801732A priority Critical patent/FR2627210A1/en
Publication of FR2627210A1 publication Critical patent/FR2627210A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E04C3/14—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with substantially solid, i.e. unapertured, web
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E04C3/18—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with metal or other reinforcements or tensioning members

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

A pre-stressed joint, especially forming a continuous beam of plywood, consists of cylindrical elements (3) which are fixed to the beam sections on either side of the joint and at the top and bottom of the beam. The cylindrical elements have holes through them for steel wires (4) which are held in place by separating plates (5) and wedging cones. cones. The wires are greated and the ends of the cylindrical elements are covered to prevent corrosion. The initial tension can be set with the aid of a graduated power cylinder, after which the wires keep the joint tensioned. ADVANTAGE - Allows continuous beam lengths to be produced.

Description

- n E S C R J P T 7 o N -
La présente invention concerne un moyen d'assemblage de poutres en bois lamellé collé.- n ESCRJPT 7 o N -
The present invention relates to a means of assembling glued laminated wood beams.

Il peut être utilisé en joint de transport pour des poutres sur deux appuis ou encore en joint de continuité pour des poutres à appuis multiples. It can be used as a transport joint for beams on two supports or as a continuity joint for beams with multiple supports.

De tels assemblages sont habituellement réalisas par boulonnage de pièces métalliques, souvent divers crampons sont intercalés. Ces moyens sont difficilement mis en oeuvre. Les trous souvent ovalisés pour le passage des boulons nuisent à la tenue de l'ensemble. Such assemblies are usually carried out by bolting metal parts, often various studs are interposed. These means are difficult to implement. The often ovalized holes for the passage of the bolts affect the strength of the assembly.

Le dispositif, objet de l'invention, permet de remédier à ces inconvénients; la mise en place est facile, sans difficulté particulière. The device, object of the invention, overcomes these drawbacks; the installation is easy, without any particular difficulty.

Le dispositif de l'invention va être décrit suivant un exemple de réalisation non limitatif. La poutre choisie est de section rectangulaire. The device of the invention will be described according to a nonlimiting exemplary embodiment. The beam chosen is of rectangular section.

De part et d'autre des quarts supérieurs et inférieurs des éléments assemblés sont collés des membrures identiques percées dans le sens de la longueur pour le passage des fils d'acier de précontrainte. On either side of the upper and lower quarters of the assembled elements are bonded identical members drilled lengthwise for the passage of the prestressed steel wires.

La surface de collage et la section des membrures sont fonction de la force de précontrainte. The bonding surface and the cross-section of the members depend on the prestressing force.

Les deux éléments présentés bout à bout, les cables sont introduits dans leur logement, des plaques d'acier de répartition sont mises en placé à chacune des extrémités des membrures.  The two elements presented end to end, the cables are introduced into their housing, steel distribution plates are placed at each of the ends of the members.

Sur celles-ci sont installées des cuvettes à cônes de e]svGtago (genre Freyssinet). On these are installed cone bowls from e] svGtago (genus Freyssinet).

La tension mesurée des fils est effectuée à l'aide d'un vérin gradué. The measured thread tension is carried out using a graduated cylinder.

La section des membrures est dimensionnée de telle sorte que la force de précontrainte passe par elle à l'ex- clusion des éléments de poutre. Le joint est réalise. The section of the members is dimensioned so that the prestressing force passes through it, excluding the beam elements. The joint is made.

L'emploi d'acier spécial à haute résistance permet, sous charge, le maintien en phase élastique; après relaxa tion, la force constante de l'assemblage est assurée. The use of special high-strength steel allows, under load, to maintain the elastic phase; after relaxation, the constant force of the assembly is ensured.

Les fils de précontrainte sont protégés à l'intérieur des bois, par graisse spéciale; les embouts sont soigneseuments cachetés pour éviter la corrosion. The prestressing wires are protected inside the woods by special grease; the tips are carefully sealed to avoid corrosion.

Les dessins annexés illustrent schématiquement et à titre d'exemple une forme d'exécution selon l'invention. The accompanying drawings illustrate schematically and by way of example an embodiment according to the invention.

La figure I, planche 1 représente l'assemblage des deux extrémités de la poutre en élévation. Figure I, plate 1 shows the assembly of the two ends of the beam in elevation.

Les repères 1 et 2 sont les deux tronçons de la poutre à assembler. The marks 1 and 2 are the two sections of the beam to be assembled.

Les repères 3 les membrures de précontrainte avec leur logement 4 du fil; le repère 5 la plaque d'appui des cônes de blocage des fils. The marks 3 the prestressing members with their housing 4 of the wire; reference 5 the support plate of the wire locking cones.

La figure 2 de la planche I illustre la vue en plan du dispositif. Figure 2 of Plate I illustrates the plan view of the device.

1 et 2 la poutre à assembler, 3 les membrures, 4 le logement du fil, 5 la plaque d'appui et le système de blocage. 1 and 2 the beam to be assembled, 3 the frames, 4 the wire housing, 5 the support plate and the locking system.

La figure 3, de la planche II illustre la vue du dispositif en place - repère 1 la poutre assemblée. Figure 3, of the board II illustrates the view of the device in place - reference 1 the assembled beam.

- repère 3 les membrures.- mark 3 the members.

- repère 5 les plaques d'appui.- mark 5 the support plates.

- repère 5 les cuvettes avec cônes de serrage en place.- mark 5 the cups with clamping cones in place.

La figure 4, planche II représente une vue en cou pe de l'assemblage. 1 la poutre, 3 les membrures, les fils de précontrainte dans leurs logements. FIG. 4, plate II represents a view in neck of the assembly. 1 the beam, 3 the frames, the prestressing wires in their housings.

Le dispositif ci-dessus est décrit à titre d'exemple. The above device is described by way of example.

La position de membrures sur la poutre est choi- sie pour iit bot résultant, mais le déplacement des membrures vers le centre ou leur remplacement par une seule membrure de part et d'autre de la poutre reste du domaine de l'invention. The position of members on the beam is chosen for the resulting bot, but the displacement of the members towards the center or their replacement by a single member on either side of the beam remains within the scope of the invention.

Des membrures de liaison disposées en une seule ligne, par dessus et par dessous des éléments de poutre à assembler restent également du domaine de l'invention. Connecting members arranged in a single line, above and below beam elements to be assembled also remain within the scope of the invention.

La multiplication des fils de précontrainte, plusieurs par membrure, reste du domaine de l'invention. The multiplication of prestressing wires, several per member, remains within the scope of the invention.

La liaison mixte, collage et brochage des membrures sur les poutres est du domaine de l'invention. The joint connection, gluing and broaching of the frames on the beams is the field of the invention.

Le dispositif, objet de l'invention est destiné à la jonction de poutres en bois lamellé. Le procédé de précontrainte employé est du domaine de la construction de charpente en bois de grandes dimensions.  The device which is the subject of the invention is intended for joining laminated wooden beams. The prestressing process used is in the field of large wooden frame construction.

Claims (5)

REVENDICATIONS 1/ Dispositif d'assemblage en bout, du type joint de transport, de poutres en bois lamellé collé caractérisé en ce qu'il comporte des moyens de liaison (3,4,5) par précontrainte. 1 / End assembly device, of the transport joint type, of glued laminated wood beams characterized in that it comprises connection means (3,4,5) by prestressing. 2/ Dispositif selon la revendication 1 caractérisé en ce que des membrures (3) sont disposées par collage à l'extrémité des poutres à assembler, de part et d'autre des quarts supérieurs et inférieurs. 2 / Device according to claim 1 characterized in that the frames (3) are arranged by gluing at the end of the beams to be assembled, on either side of the upper and lower quarters. 3/ Dispositif suivant la revendication 2 caractérisé par le fait que les membrures (3) liées aux poutres (1, 2) comportent des logements longitudinaux de passage des fils (4). 3 / Device according to claim 2 characterized in that the frames (3) linked to the beams (1, 2) have longitudinal housing for the passage of the son (4). 4/ Dispositif selon la revendication 2 caractérisé par le fait que des plaques de répartition (5) en acier reçoivent les cuvettes à cône de blocage des fils. 4 / Device according to claim 2 characterized in that the distribution plates (5) of steel receive the cones of the son blocking cone. 5/ Dispositif selon la revendication 1 caractérisé en ce que les fils (4) dácier de précontrainte pour l'assemblage de poutres en bois lamellé précontraint ou non, sont protégés dans le bois par graisse, les embouts étant obturés pour éviter la corrosion.  5 / Device according to claim 1 characterized in that the son (4) of prestressing steel for the assembly of beams in pre-stressed or non-laminated laminated wood, are protected in the wood by grease, the end pieces being closed to prevent corrosion.
FR8801732A 1988-02-11 1988-02-11 Pre-stressed joint esp. for plywood beam - comprises cylindrical elements with holes for tensioned steel wires Withdrawn FR2627210A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8801732A FR2627210A1 (en) 1988-02-11 1988-02-11 Pre-stressed joint esp. for plywood beam - comprises cylindrical elements with holes for tensioned steel wires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8801732A FR2627210A1 (en) 1988-02-11 1988-02-11 Pre-stressed joint esp. for plywood beam - comprises cylindrical elements with holes for tensioned steel wires

Publications (1)

Publication Number Publication Date
FR2627210A1 true FR2627210A1 (en) 1989-08-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011068420A1 (en) * 2009-12-04 2011-06-09 Structural Timber Innovation Company Limited Joint for building construction including wood load bearing element(s)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH394572A (en) * 1961-06-28 1965-06-30 Skoog Arnold Reinforced wood
US3251162A (en) * 1962-01-25 1966-05-17 Pierce J Strimple Laminated prestressed beam construction
US3309833A (en) * 1963-05-22 1967-03-21 Automated Building Components Structural wooden beams
EP0042101A2 (en) * 1980-06-12 1981-12-23 Leif Urban Fraenki Roof-truss comprising a tension member
WO1982003647A1 (en) * 1981-04-09 1982-10-28 Zak Telesphore Devices for improving the flexural strength of wood beams
EP0129976A2 (en) * 1983-05-25 1985-01-02 PSC Freyssinet Limited Improvements in tendons for post-tensioned pre-stressed concrete structures
EP0177350A2 (en) * 1984-10-04 1986-04-09 Albert Bruce Curtis A reinforced structural support member

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH394572A (en) * 1961-06-28 1965-06-30 Skoog Arnold Reinforced wood
US3251162A (en) * 1962-01-25 1966-05-17 Pierce J Strimple Laminated prestressed beam construction
US3309833A (en) * 1963-05-22 1967-03-21 Automated Building Components Structural wooden beams
EP0042101A2 (en) * 1980-06-12 1981-12-23 Leif Urban Fraenki Roof-truss comprising a tension member
WO1982003647A1 (en) * 1981-04-09 1982-10-28 Zak Telesphore Devices for improving the flexural strength of wood beams
EP0129976A2 (en) * 1983-05-25 1985-01-02 PSC Freyssinet Limited Improvements in tendons for post-tensioned pre-stressed concrete structures
EP0177350A2 (en) * 1984-10-04 1986-04-09 Albert Bruce Curtis A reinforced structural support member

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011068420A1 (en) * 2009-12-04 2011-06-09 Structural Timber Innovation Company Limited Joint for building construction including wood load bearing element(s)

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