EP2868841A1 - Verstärkungsverfahren eines Bauelements aus Holz durch ein Verstärkungsmodul - Google Patents

Verstärkungsverfahren eines Bauelements aus Holz durch ein Verstärkungsmodul Download PDF

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Publication number
EP2868841A1
EP2868841A1 EP20140190571 EP14190571A EP2868841A1 EP 2868841 A1 EP2868841 A1 EP 2868841A1 EP 20140190571 EP20140190571 EP 20140190571 EP 14190571 A EP14190571 A EP 14190571A EP 2868841 A1 EP2868841 A1 EP 2868841A1
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EP
European Patent Office
Prior art keywords
reinforcement
modules
reinforcing
connectors
reinforced
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Withdrawn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
EP20140190571
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English (en)
French (fr)
Inventor
Marc-Henry Menard
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.)
M LEFEVRE
Original Assignee
M LEFEVRE
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 M LEFEVRE filed Critical M LEFEVRE
Publication of EP2868841A1 publication Critical patent/EP2868841A1/de
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E04G2023/0248—Increasing or restoring the load-bearing capacity of building construction elements of elements made of wood

Definitions

  • the present invention relates to the field of reinforcement of wooden construction structures (new or old, solid, glulam or assembly) extending between at least two support points and working in flexion, in tension, in compression, in buckling or spill.
  • Permanent or occasional overloads due to the exploitation can also be applied to the structure of wooden construction, which requires to increase its carrying capacity by increasing its inertia.
  • the evolution of structural design standards may also require compliance of the building structure imposing to increase its inertia.
  • the object of the invention is therefore to overcome these disadvantages and to simplify the implementation of the reinforcement of a structural element made of solid wood or glulam which may have deformed with respect to its initial shape, for example a beam bent.
  • the object of the invention is therefore to strengthen an existing structure in a simple and effective manner by adding a reinforcement module on one of the faces of the structure to be reinforced.
  • Another object of the invention is to bring end-to-end reinforcement modules to be assembled directly on the site, for example under the structure to be reinforced, in order to ensure the mechanical continuity of the traction forces that the assembled reinforcement must take up. .
  • the invention relates to a method of reinforcing a structural element made of solid wood or laminated wood, in which at least one row of at least one connector, on at least one of the faces of said building element, at least one reinforcing module of solid wood or laminated wood.
  • the building elements of solid wood or laminated wood are reinforced by the integration of reinforcing modules or prostheses of wood or glue-laminated for example on the lower surface, called the intrados, of the building element. strengthen.
  • Such a prosthesis may be of constant or variable height and its length is often limited to the central zone of the beam where the bending moments are high.
  • the prosthesis thus contributes to increasing the inertia of the reinforced beam and can be added to it either directly, in which case the prosthesis is active only after overloading the beam, or after a so-called jacking stage consisting in creating a counter-arrow, given to the beam at the time of its strengthening with the help of jacks, so that the prosthesis is immediately in tension during the deverinage of the whole.
  • a surface of the building element to be reinforced is brought into contact with the reinforcement module and the contact surface is bonded by a binder.
  • the connectors may be screws or studs sealed by a binder, such as, for example, a resin or a glue simultaneously in the beam and the reinforcement module, or reinforcements constituted by rods or rigid bars, for example made of fiber
  • a binder such as, for example, a resin or a glue simultaneously in the beam and the reinforcement module, or reinforcements constituted by rods or rigid bars, for example made of fiber
  • At least two adjacent reinforcement modules made of solid wood or glued laminated wood joined to each other by means of at least one connecting reinforcement are fixed on at least one of the faces of the said construction element. intended to be inserted longitudinally in each of the reinforcement modules respectively in each of the reinforcement modules and sealed by a binder.
  • the bonding frame may be made of metallic material, composite material, synthetic material, or mineral.
  • the two adjacent reinforcement modules each have an end in contact with the end of the adjacent reinforcement module. The two ends in contact forming a shape-matching splice, for example flat, stair-shaped, Jupiter line or any other shape.
  • each of the reinforcement modules is assembled to the beam to be reinforced by means of at least two rows of connectors, each of the rows being disposed on either side of the connecting frame.
  • At least one hoop reinforcement is positioned respectively in the reinforcement module (s) and the beam to be reinforced.
  • the binder used to attach the reinforcement module (s) to the beam to be reinforced, to seal the binding reinforcement or to seal the connector (s) may be a resin, for example of the epoxy type or an adhesive, for example, cyanoacrylate, polyurethane, formaldehyde or any other suitable adhesive or resin.
  • a beam 1 for example of solid wood or glued laminated, having a lower surface, said lower surface or convex plane 1a, and to be reinforced either because of a degradation of its mechanical properties, or because of an increase the load she has to bear.
  • a reinforcement module 2 made of solid wood or laminated wood is fixed on the lower face 1a of the beam 1 via of a plurality of connectors 3.
  • the connectors 3 are screws, six in number, arranged inclined with respect to the longitudinal direction of the beam to be reinforced 1.
  • the connectors 3 could be disposed substantially perpendicular to the longitudinal direction of the beam to be reinforced 1. Note that one could provide a number of connectors greater than or equal to one.
  • the connectors 3 may be studs sealed by a binder (not shown) such as, for example, a resin or a glue simultaneously in the beam 1 and the reinforcement module 2, or reinforcements constituted by rods or rigid bars, for example fiberglass, carbon, steel or other ....
  • a binder such as, for example, a resin or a glue simultaneously in the beam 1 and the reinforcement module 2, or reinforcements constituted by rods or rigid bars, for example fiberglass, carbon, steel or other ....
  • the connectors 3 are positioned in bores 2a, 1b made respectively in the reinforcement module 2 and in the beam 1 to be reinforced.
  • the lower surface 1a of the beam 1 to be reinforced is bonded by a binder 4, such as for example glue, with the upper surface 2b of the reinforcement module 2.
  • a binder 4 such as for example glue
  • the reinforcement module 2 is assembled by gluing and screwing or by bonding and broaching to the beam to be reinforced 1.
  • two or more solid reinforcement modules 2n, 2 (n + 1), made of solid wood or laminated wood are attached to the lower surface 1a of the reinforcing beam 1 in identical manner to the fixing method described with reference to the figure 1 .
  • a first 2n reinforcement module made of solid wood or laminated wood is fixed on the lower face 1a of the beam 1 by means of a plurality of connectors 3.
  • the connectors 3 are screws, six in number, arranged inclined with respect to the longitudinal direction of the beam to be reinforced 1.
  • the connectors 3 could be arranged substantially perpendicular to the direction longitudinal of the beam to strengthen 1. Note that one could provide a number of connectors 3 greater than or equal to one.
  • the connectors 3 may be studs sealed by a binder (not shown) such as, for example, a resin or a glue simultaneously in the beam 1 and the reinforcement module 2, or reinforcements constituted by rods or rigid bars, for example fiberglass, carbon, steel or other ....
  • the connectors 3 are positioned in bores 1b made respectively in the first reinforcement module 2n and in the beam 1 to be reinforced.
  • the lower surface 1a of the beam 1 to be reinforced is bonded by a binder 4, such as for example glue, with the upper surface of the first reinforcement module 2n.
  • a binder 4 such as for example glue
  • the first reinforcement module 2n is assembled by gluing and screwing or by gluing and broaching to the beam to be reinforced 1.
  • the first reinforcement module 2n has a first end 6n having a lateral surface and a second end 7n, opposite the first end 6n.
  • the second reinforcement module 2 (n + 1) has a first end 6 (n + 1) having a lateral surface and a second end 7 (n + 1), opposite the first end 6 (n + 1). ).
  • the second ends 7n, 7 (n + 1) respectively of the first and second reinforcement modules 2n, 2 (n + 1) are in contact with one another, so that the two reinforcement modules 2n, 2 (n + 1) are put end to end.
  • the second ends in contact 7n, 7 (n + 1) are in shape and each have a substantially planar groove.
  • a binder 8 such as for example glue, is disposed on the surfaces of the second ends 7n, 7 (n + 1) of the reinforcing modules 2n, 2 (n + 1). Note that one could not use glue between the reinforcement modules.
  • the two reinforcing modules 2n, 2 (n + 1) are connected together by means of a connecting armature 9 constituted by a rod or rigid bar intended to be inserted in a housing 10n, 10 (n + 1) ) practiced respectively in the first and the second reinforcement module 2n, 2 (n + 1) and sealed by a binder 11.
  • the connecting armature 9 is disposed in an axis parallel to the longitudinal axis of the reinforcement modules 2n, 2 (n + 1), preferably close to the lower surfaces (not referenced) of the reinforcement modules 2n, 2 (n + 1) in order to take up the tensile stresses applied to the beam. Indeed, the tensile stresses are maximum in the lower part of the flexural reinforcement modules.
  • binding frames 9 could be greater than one. Indeed, one could, for example, have an additional connecting armature above the binding frame 9 illustrated on the figures 2 and 3 .
  • the anchoring length of the connecting reinforcement 9 in the reinforcement module 2n, 2 (n + 1) corresponding can be calculated and depends on the arrow to be applied to the beam. By way of non-limiting example, this anchor length may be greater than 80 cm.
  • the connecting armature 9 can be made of metal material, carbon fiber, fiberglass, aramid fiber, mineral fiber or any other synthesized material based on polymer.
  • the bonding frame may also be made of composite material such as carbon-epoxy, glass-epoxy, glass-vinylester, aramid-epoxy rods, etc.
  • the housing 10n, 10 (n + 1) may be a hole made respectively in each of the reinforcement modules or a notch.
  • the two reinforcement modules 2n, 2 (n + 1) are assembled to the reinforcement beam 1 by means of two rows of connectors 3 arranged on either side of the connecting reinforcement 9. It will be noted that it is possible to provide a single row of connectors 3 arranged on one side of the connecting armature 9.
  • hoop reinforcements 12 intended to provide the hooping of the reinforcement modules and the beam to be reinforced, are inserted in bores (not referenced) made perpendicular to the longitudinal axis of the beam to be reinforced or in a substantially inclined direction relative to the perpendicular axis, respectively in the reinforcement modules 2n, 2 (n + 1) and in the beam to be reinforced 1, beyond the connecting armatures 9.
  • the hooping frames 12 could be arranged along the connecting armature 9, for example in a row or in two rows disposed on either side of the connecting armature 9. It will be noted that it would be possible to provide as hooping frame 12, self drilling screws do not require the creation of a drilling beforehand.
  • hooping frames 12 make it possible to prevent the formation of cracks in the reinforcement modules 2n, 2 (n + 1) at the interface between the reinforcement beam 1 and the reinforcement modules when the beam to be reinforced is subjected to a reinforcement. significant bending force.
  • the hooping frames 12 also make it possible to prevent the formation of cracks in the reinforcement modules in planes parallel to the connecting reinforcement 9.
  • hooping reinforcement may not be provided between the reinforcement module and the beam to strengthen.
  • the reinforcements may be made of metallic material.
  • the two reinforcement modules 2n, 2 (n + 1) are assembled to the reinforcement beam 1 according to the reinforcement method illustrated with reference to FIG. figure 2 via a plurality of connectors 3.
  • the lower surface 1a of the beam to be reinforced 1 is, in an identical manner, bonded by a binder 4, such as for example glue, with the upper surface 2 of each of the reinforcement modules 2n, 2 (n + 1).
  • a binder 4 such as for example glue
  • the reinforcement modules 2n, 2 (n + 1) are assembled by gluing and screwing or by bonding and broaching to the beam to be reinforced 1.
  • the first reinforcement module 2n has a first end 6n having a lateral surface and a second end 7n, opposite the first end 6n.
  • the second reinforcement module 2 (n + 1) has a first end 6 (n + 1) having a lateral surface and a second end 7 (n + 1), opposite the first end 6 (n + 1). ).
  • the second ends 7n, 7 (n + 1) respectively of the first and second reinforcement modules 2n, 2 (n + 1) are in contact from each other, so that the two reinforcement modules 2n, 2 (n + 1) are put end to end.
  • the second ends in contact 7n, 7 (n + 1) are in shape and each have a stair-shaped splice.
  • a binder 8 such as for example glue, is disposed on the surfaces of the second ends 7n, 7 (n + 1) of the reinforcing modules 2n, 2 (n + 1). Note that one could not use glue between the reinforcement modules.
  • the two reinforcing modules 2n, 2 (n + 1) are connected together by means of two connecting armatures 9a, 9b each constituted by a rod or rigid bar intended to be inserted into a housing 10n, 10 (n +1), 13n, 13 (n + 1) practiced respectively in the first and the second reinforcement module 2n, 2 (n + 1) and each sealed by a binder 11a, 11b.
  • the housing 10n, 10 (n + 1); 13n, 13 (n + 1) may be a bore made respectively in each of the reinforcement modules or a notch.
  • the connecting armatures 9a, 9b are arranged one above the other in an axis parallel to the longitudinal axis of the reinforcing modules 2n, 2 (n + 1), preferably close to lower surfaces (not referenced) of the reinforcement modules 2n, 2 (n + 1) in order to take up the tensile stresses applied to the beam.
  • the two reinforcement modules 2n, 2 (n + 1) are assembled to the reinforcement beam 1 by means of two rows of connectors 3 arranged on either side of the connecting plates 9a, 9b . Note that one could provide a single row of connectors 3 arranged on one side of the connecting plates 9a, 9b.
  • the connectors 3 are reinforcements consisting of pins, rods or rigid bars sealed by a binder 5.
  • the studs 3 are three in number and are arranged in an inclined manner with respect to the longitudinal direction of the beam.
  • the connectors 3 could be arranged substantially perpendicular to the longitudinal direction of the beam to be reinforced 1. It should be noted that a number of connectors 3 greater than or equal to one could be provided.
  • the connectors 3 are made of, for example, fiberglass, carbon, steel or other ... and are sealed with a resin 5, for example of the epoxy type, or an adhesive, for example of the cyanoacrylate type, simultaneously in the beam 1 and the associated reinforcement module 2n, 2 (n + 1).
  • Connectors consisting of screws as illustrated on the figure 1 .
  • the connectors 3 are positioned in bores 1b made respectively in each of the reinforcement modules 2, 2n, 2 (n + 1) and in the beam 1 to strengthen.
  • the lower surface 1a of the beam 1 to be reinforced is bonded by a binder 4, such as for example glue, with each of the reinforcement modules 2, 2n, 2 (n + 1), to resume shear forces between the beam to be reinforced 1 and the reinforcement modules 2, 2n, 2 (n + 1).
  • a binder 4 such as for example glue
  • the first reinforcing module 2 comprises a first end 6 having a lateral surface and a second end 7, opposite the first end 6.
  • the second reinforcement module 2n has a first end 6n having a lateral surface and a second end 7n, opposite the first end 6n.
  • the third reinforcement module 2 (n + 1) has a first end 6 (n + 1) having a lateral surface and a second end 7 (n + 1) opposite the first end 6 (n + 1). ).
  • the second ends 7, 7n respectively of the first and second reinforcement modules 2, 2n are in contact with each other, and the first ends 6n, 6 (n + 1) respectively of the second and third reinforcement modules 2n, 2 (n + 1) are in contact with each other, so that the three reinforcement modules 2, 2n, 2 (n + 1) are put end to end.
  • the contacting ends 7, 7n and 6n, 6 (n + 1) are in shape and have a step spline, as illustrated with reference to the figure 4 . Note that one could provide a planar splice or any fit in shape.
  • a binder 8 such as for example glue, is disposed on the surfaces of the contacting ends 7, 7n and 6n, 6 (n + 1) of the reinforcing modules 2, 2n, 2 (n + 1). Note that one could not use glue between the reinforcement modules.
  • the three reinforcement modules 2, 2n, 2 (n + 1) are assembled together by means of a connecting armature 9 as illustrated on the figures 2 and 3 .
  • the connecting armature 9 is constituted by a rod or rigid bar intended to be inserted into a housing 10, 10n, 10 (n + 1) made respectively in each of the reinforcement modules 2, 2n, 2 (n + 1).
  • each binding frame 9 is sealed by a binder 11. It will be noted that the number of binding frames 9 could be greater than one. Indeed, one could, for example, have an additional connecting armature above the connecting armature 9, as shown in FIG. figure 4 .
  • the two reinforcing modules 2n, 2 (n + 1) are placed end to end by their respective second end along an assembly line or splice called "Jupiter line".
  • Each of the second ends 7n, 7 (n + 1) has bevelled portions and a key 14 is inserted into a housing (not referenced) to block the two reinforcing modules 2n, 2 (n + 1) to butt.
  • a binder 8 such as for example glue, is disposed on the surfaces of the second ends 7n, 7 (n + 1) of the reinforcing modules 2n, 2 (n + 1). Note that one could not use glue between the reinforcement modules.
  • the two reinforcing modules 2n, 2 (n + 1) are connected together by means of a connecting armature 9 constituted by a rod or rigid bar intended to be inserted into a housing 10n, 10 (n + 1) ) practiced respectively in the first and the second reinforcement module 2n, 2 (n + 1) and sealed by a binder 11.
  • the connecting armature 9 is disposed in an axis parallel to the longitudinal axis of the reinforcement modules 2n, 2 (n + 1), preferably close to the lower surfaces (not referenced) of the reinforcement modules 2n, 2 (n + 1) in order to take up the constraints of traction applied to the beam.
  • the number of binding frames 9 could be greater than one. Indeed, one could, for example, have an additional connecting armature above the connecting armature 9, as shown in FIG. figure 4 .
  • the housing 10n, 10 (n + 1) may be a hole made respectively in each of the reinforcement modules or a notch.
  • the reinforcement method is not limited to the use of one, two or three reinforcement modules. Alternatively, a number of higher reinforcement modules could be used to repair, for example, a large area or length of a damaged beam.
  • the invention is suitable for any structure whose surface must be repaired, both during reinforcement work and at the end thereof.
  • the invention it is possible to restore resistance to bending, tensile, compressive, buckling or spilling to the beam of wood or glued laminated which is damaged by, on the one hand, fastening via at least one connector, supplemented or not by an injection of resin or glue, reinforcement modules of wood or laminated on at least one surface of the damaged beam and secondly by a linear assembly of the modules of reinforcement between them.
  • the damaged wooden beam is thus restored directly on site thanks to the reinforcement method described.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Joining Of Building Structures In Genera (AREA)
EP20140190571 2013-10-30 2014-10-28 Verstärkungsverfahren eines Bauelements aus Holz durch ein Verstärkungsmodul Withdrawn EP2868841A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1360615A FR3012495B1 (fr) 2013-10-30 2013-10-30 Procede de renforcement d'un element de construction en bois par un module de renfort

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EP2868841A1 true EP2868841A1 (de) 2015-05-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3044687A1 (fr) * 2015-12-07 2017-06-09 M Lefevre Procede de renforcement d'un element de construction par assemblage de modules de renfort et d'au moins une plaque connectee aux modules de renfort

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107869254A (zh) * 2017-10-31 2018-04-03 南京林业大学 一种竹材增强圆木受弯构件的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3405592A (en) * 1966-12-12 1968-10-15 Blodee Leif Dowel structure
EP0034224A2 (de) * 1980-02-15 1981-08-26 Emergo Chemical Coating, N.V. Verfahren zum Verstärken von Holzbalken und so erhaltene Balken
GB2150969A (en) * 1983-12-06 1985-07-10 Dinardo And Partners Restoring and strengthening of timber components
EP0620332A1 (de) * 1993-03-24 1994-10-19 Ferwood S.A. Verfahren zum Verbinden von Holzteilen und Epoxy-Mischung zur dessen Durchführung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2585393B1 (fr) * 1985-07-29 1988-03-25 Renofors France Poutre ou autre element de construction en bois renforce au moyen d'une armature, et procede pour sa realisation
DE4200455A1 (de) * 1992-01-10 1993-07-15 Karl Moser Verfahren zum verbinden von holzbauteilen
EP1761702B1 (de) * 2004-06-30 2011-11-23 Vestas Wind Systems A/S Aus zwei getrennten teilen hergestellte windturbinenflügel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3405592A (en) * 1966-12-12 1968-10-15 Blodee Leif Dowel structure
EP0034224A2 (de) * 1980-02-15 1981-08-26 Emergo Chemical Coating, N.V. Verfahren zum Verstärken von Holzbalken und so erhaltene Balken
GB2150969A (en) * 1983-12-06 1985-07-10 Dinardo And Partners Restoring and strengthening of timber components
EP0620332A1 (de) * 1993-03-24 1994-10-19 Ferwood S.A. Verfahren zum Verbinden von Holzteilen und Epoxy-Mischung zur dessen Durchführung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3044687A1 (fr) * 2015-12-07 2017-06-09 M Lefevre Procede de renforcement d'un element de construction par assemblage de modules de renfort et d'au moins une plaque connectee aux modules de renfort

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FR3012495B1 (fr) 2016-05-20
FR3012495A1 (fr) 2015-05-01

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