EP0837202B1 - Procédé de renforcement d'un ouvrage de construction, et ouvrage ainsi renforcé - Google Patents
Procédé de renforcement d'un ouvrage de construction, et ouvrage ainsi renforcé Download PDFInfo
- Publication number
- EP0837202B1 EP0837202B1 EP97402421A EP97402421A EP0837202B1 EP 0837202 B1 EP0837202 B1 EP 0837202B1 EP 97402421 A EP97402421 A EP 97402421A EP 97402421 A EP97402421 A EP 97402421A EP 0837202 B1 EP0837202 B1 EP 0837202B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reinforcement
- fibres
- resin
- reinforcements
- hole
- 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.)
- Expired - Lifetime
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Images
Classifications
-
- 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
- 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
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
-
- 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
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
- E04G2023/0262—Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off
Definitions
- the present invention relates to the field of reinforcement structural of construction works.
- the reinforcement consists of a steel sheet bonded to concrete after preparation of the surface of bonding.
- This classic process has followed various evolutions taking into account in particular the technological evolution of materials, and more particularly the evolution of materials replacement of the sheet metal, which frequently poses implementation problems and requires provisions to fight corrosion.
- FIG. 1 shows a section schematic of a reinforced concrete beam 8 resting on two supports 9 neighbors of its ends, and whose lower face comprises, between these two supports 9, a bonded reinforcement 10 tensile strength in the longitudinal direction of the beam.
- Glued reinforcement 10 improves behavior of the beam 8 in response to a force F tending to flex it between its two supports 9.
- this rupture generally occurs in "overlay" concrete, that is to say in the thickness of unreinforced concrete located between the surface provided with bonded reinforcement 10 and the underlying reinforcing bars 11.
- failure 12 begins in the vicinity from one end of the bonded reinforcement 10 under the effect of the shear force E resulting from the reaction R one of the supports 9 and the tensile force T that reinforcement 10 exerts, then propagates along the irons of reinforcement 11.
- it is the concrete of the structure who yields, in a part where he does not work in compression (its desired solicitation mode) but in shear.
- US-A-5,218,810 describes a composite reinforcement which does not adhere directly to the support against which it is applied.
- This support is a concrete element in the form of column, which the composite reinforcement comes to surround for form a coherent protective shell.
- WO95 / 34724 it has been proposed to extend to walls the application of such weakly adherent reinforcements. The effect of shell is impossible topologically, holding the reinforcement on the wall is provided by installed anchors using holes drilled in the wall, these anchors can be covered by the reinforcement.
- the object of the present invention is to improve the reinforcements of works by means of reinforcements glued in eliminating much of the areas of weakness that can remain.
- the invention thus provides a method of strengthening a construction work, as set out in the claim 1.
- the wick installed creates a kind of frame between the surface provided with the glued reinforcement and the other zone strengthened.
- the installation of these reinforcing bits is easy as soon as the surface is accessible to stick to it reinforcement.
- the fiber wick has the advantage that it is easily folded down and / or spread on the surface before covering it by the glued reinforcement. This ensures good transmission efforts while avoiding forming protrusions important on the reinforced surface.
- the fibers of the wick are preferably made of carbon. It is however possible to use fibers of glass or synthetic fibers, or even metallic fibers (piano string).
- the bonded reinforcement may in particular be based on sheet metal or composite material.
- this reinforcement consists of a strip or a carbon fiber fabric that is glued to the surface by coating the surface with a suitable fluid resin to polymerize at room temperature, then applying the tape or fabric on the coated surface so that the resin permeates the fibers and ensures bonding.
- the hole receiving the wick can then be filled with the same resin than the one with which the surface is coated.
- a second aspect of the invention relates to a construction work as set out in the claim 5.
- FIGs 2 and 3 illustrate an example application a reinforcement glued to a floor slab 15 in reinforced concrete resting on support elements 16, capable of be walls, posts or the like. Between these support elements 16, only one of which is shown in the Figure 2, provision is made to line the lower surface 17 of the slab 15 of a bonded reinforcement 18.
- Reinforcement 18 is intended to resist traction following a main direction A going from an element of support 16 to another.
- the reinforcement 18 preferably consists into a band of oriented sized carbon fibers parallel to direction A, or in a fabric of carbon fibers whose warp threads are oriented in direction A, the carbon fibers being impregnated a resin that hardens at room temperature.
- the installation of the reinforcement 18 can in particular be carried out in the manner following: an epoxy resin, capable of polymerizing at room temperature, is coated in the liquid state on the surface 17; the tape or fabric is then applied to the coated surface so that the resin permeates the fibers and ensures bonding. Tape or fabric can be applied by a simple masking, not requiring the application of prolonged pressure.
- the resin used is for example the epoxy resin two-component consisting on the one hand of the base resin brand "CECA XEP 3935 / A", and on the other hand by the hardener "CECA XEP 2919 / B” brand, these two components being manufactured and marketed by CECA S.A., 12 place de l'Iris, La Défense 2, Cedex 54, 92062 PARIS LA DEFENSE (FRANCE).
- This resin has, when applied to fluid state, viscosity at room temperature included between 1,000 and 10,000 mPa.s.
- the sized carbon fibers constituting the strip or fabric 18 have a breaking strength in tension which is greater than 1500 MPa, and a module elastic between 200 and 400 GPa.
- wicks of fibers 23, 24 threaded in holes 25, 26 drilled between surface 17 and zone 20.
- the fibers of each wick 23, 24 are impregnated with a resin 27 which fills the hole 25, 26.
- the wicks 23, 24 preferably consist of sized carbon fibers which may be of the same kind as those of the fabric 18.
- the resin 27 whose holes are filled can also be of the same type as that used to impregnation and bonding of the fabric 18.
- Figure 4 illustrates the implementation of such fiber wick.
- a first step we carry out the drilling of the hole 26.
- the resin 27 is then applied to the fluid state by filling the holes 26 and coating it the surface 17.
- the wick 24 is then threaded into the hole 26, leaving an end portion 28 of this wick out of the surface 17. It is possible to provide a point of glue at the end of the fibers of the wick 24 to facilitate the introduction of this wick into its hole.
- Sizing of holes and wicks of fibers, and their distribution on the reinforced surface 17 will be generally defined on the basis of structural calculations carried out by the design office.
- These connecting means could simply consist of nails or the like. But they are preferably also constituted by strands of fibers 24 embedded in the resin 27 and engaged in holes 26 drilled transversely to the surface 17, as illustrated in figures 2 to 4. In these figures, the holes 26 are shown perpendicular to the surface 17, but it will be understood that they could also be inclined in the same direction as the holes 25 provided at the ends.
- Figures 5 and 6 illustrate the application, according to the invention, a bonded reinforcement 32, which can be of the same type as before, on an irregular support consisting, in the example considered, of the underside a ribbed floor 30, the ribs 31 of which are transverse to the main direction A according to which the reinforcement must resist tensile forces.
- the invention allows in this case to ensure a transmission of tensile forces between two reinforcements neighbors separated by a rib 31.
- Each hole 34 intended to receive a wick of fibers 35 is then drilled through the rib 31, so flush with the two surfaces 33, 33a located in the extension of one another.
- the wick of fibers 35 is introduced into this hole 34, leaving its two ends 36 on either side of the rib 31. Au level of these two ends 36, the fibers of the wick 34 are disunited and spread out on both sides of the management A as shown in figure 6, to ensure the better transmission of forces.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Bridges Or Land Bridges (AREA)
Description
- la figure 1, précédemment discutée, est une vue schématique d'un poutre en béton armé pourvue d'un renfort collé et se rompant sous l'effet d'un effort de flexion ;
- la figure 2 est une vue en coupe et en élévation, suivant le plan II-II indiqué sur la figure 3, d'une portion d'ouvrage en béton armé équipée d'un renfort collé ;
- la figure 3 est une vue de dessous de la portion d'ouvrage de la figure 2 ;
- la figure 4 est une vue schématique illustrant la mise en place d'une mèche de fibres selon l'invention ;
- la figure 5 est une vue en coupe, suivant le plan V-V indiqué sur la figure 6, d'un plancher nervuré renforcé conformément à la présente invention ; et
- la figure 6 est une vue de dessous, en coupe suivant le plan VI-VI indiqué sur la figure 5, du plancher nervuré renforcé.
- une résistance au cisaillement compatible avec celle du matériau constituant l'ouvrage,
- une résistance à la rupture en traction comprise entre 5 et 100 MPa, avec un allongement à la rupture compris entre 0,5 et 10%,
- et une résistance à la rupture en compression comprise entre 5 et 100 MPa, avec un raccourcissement à la rupture compris entre 0,5 et 10%.
Claims (8)
- Procédé de renforcement d'un ouvrage de construction (30), dans lequel on colle un premier renfort (32) sur une première surface (33) de l'ouvrage, et un second renfort (32a) sur une seconde surface (33a) de l'ouvrage, lesdites première et seconde surfaces étant situées dans le prolongement l'une de l'autre, mais séparées par un obstacle (31) gênant l'application continue d'un renfort unique, caractérisé en ce qu'avant de coller les renforts, on perce au moins un trou (34) à travers l'obstacle (31) entre lesdites première et seconde surfaces; et on remplit ledit trou avec de la résine (27) et avec une mèche de fibres (35) dont on laisse respectivement dépasser deux portions d'extrémités (36) du côté desdites première et seconde surfaces, chacun des renforts étant ensuite collé par dessus une portion d'extrémité respective de la mèche de fibres.
- Procédé selon la revendication 1, dans lequel on désunit les fibres de la mèche (35) dans chacune de ses portions d'extrémités (36), et on étale ces fibres sur chacune des première et seconde surfaces (33,33a) avant de la recouvrir par son renfort collé (32,32a).
- Procédé selon la revendication 2 dans lequel chaque renfort (32,32a) est agencé pour résister à la traction suivant une direction principale (A) desdites surfaces (33,33a), et dans lequel les fibres de chaque portion d'extrémité (36) de la mèche (35) sont étalées en éventail de part et d'autre de ladite direction principale.
- Procédé selon l'une quelconque des revendications 1 à 3, dans lequel les renforts (32,32a) consistent en des bandes ou tissus de fibres de carbone qu'on colle en enduisant les surfaces (33,33a) d'une résine à l'état fluide apte à polymériser à température ambiante, puis en appliquant les bandes ou tissus sur les surfaces enduites pour que la résine imprègne les fibres et assure le collage, et dans lequel on remplit le trou (34) avec lamême résine (27) que celle avec laquelle on enduit les surfaces.
- Ouvrage de construction, ayant au moins des première et seconde surfaces (33,33a) respectivement pourvues de renforts collés (32,32a), lesdites première et seconde surfaces étant situées dans le prolongement l'une de l'autre, mais séparées par un obstacle (31) gênant l'application continue d'un renfort unique, caractérisé en ce qu'au moins une mèche de fibres (35) s'étend entre lesdites première et seconde surfaces dans un trou (34) rempli de résine (27), le trou (34) traversant l'obstacle entre lesdites première et seconde surfaces, la mèche de fibre ayant deux portions d'extrémité (36) qui dépassent respectivement sur lesdites première et seconde surfaces et par dessus lesquelles sont collés lesdits renforts (32,32a).
- Ouvrage de construction selon la revendication 5, dans lequel les fibres de la mèche (35), dans ses portions d'extrémité (36), sont étalées sur lesdites surfaces (33,33a).
- Ouvrage de construction selon la revendication 6, dans lequel les renforts (32,32a) sont agencés pour résister à la traction suivant une direction principale (A) desdites surfaces (33,33a), et dans lequel les fibres des portions d'extrémité (36) de la mèche sont étalées en éventail de part et d'autre de ladite direction principale.
- Ouvrage de construction selon l'une quelconque des revendications 5 à 7 dans lequel chacun desdits renforts (32,32a) consiste en une bande ou un tissu de fibres de carbone imprégnées d'une résine (27) qui assure le collage du tissu sur la surface (33,33a) de l'ouvrage et qui est de même composition que la résine dont le trou (34) est rempli.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9612619 | 1996-10-16 | ||
FR9612619A FR2754556B1 (fr) | 1996-10-16 | 1996-10-16 | Procede de renforcement d'un ouvrage de construction, et ouvrage ainsi renforce |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0837202A1 EP0837202A1 (fr) | 1998-04-22 |
EP0837202B1 true EP0837202B1 (fr) | 2003-05-21 |
Family
ID=9496721
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97402421A Expired - Lifetime EP0837202B1 (fr) | 1996-10-16 | 1997-10-14 | Procédé de renforcement d'un ouvrage de construction, et ouvrage ainsi renforcé |
EP97402420A Withdrawn EP0837201A1 (fr) | 1996-10-16 | 1997-10-14 | Procédé de renforcement d'un ouvrage de construction, et ouvrage ainsi renforcé |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97402420A Withdrawn EP0837201A1 (fr) | 1996-10-16 | 1997-10-14 | Procédé de renforcement d'un ouvrage de construction, et ouvrage ainsi renforcé |
Country Status (6)
Country | Link |
---|---|
EP (2) | EP0837202B1 (fr) |
DE (1) | DE69722125D1 (fr) |
DK (1) | DK0837202T3 (fr) |
ES (1) | ES2198538T3 (fr) |
FR (1) | FR2754556B1 (fr) |
PT (1) | PT837202E (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101343950B (zh) * | 2006-10-24 | 2012-02-01 | 菲尔(香港)有限公司 | 用于混凝土结构加固的锚固件、其制作方法及使用方法 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100408437B1 (ko) * | 1997-09-16 | 2003-12-06 | 신닛뽄세이테쯔 카부시키카이샤 | 콘크리트 부재의 보강 구조 및 보강 공법 |
WO1999061725A1 (fr) * | 1998-05-26 | 1999-12-02 | Mitsubishi Rayon Co., Ltd. | Procede pour reparer et renforcer une structure existante en beton et resine conçue a cet effet |
FR2790500B1 (fr) | 1999-03-01 | 2002-06-07 | Freyssinet Int Stup | Procede et dispositif de renforcement d'un ouvrage en beton |
FR2836502B1 (fr) * | 2002-02-25 | 2004-05-21 | Freyssinet Int Stup | Procede de renforcement d'une structure par un materiau composite et renfort obtenu par ce procede |
FR2869971B1 (fr) | 2004-05-05 | 2006-07-28 | Freyssinet Internat Stup Soc P | Procede de renforcement d'un tuyau cylindrique enterre |
DE102007010574A1 (de) * | 2007-02-26 | 2008-08-28 | Deutsche Kahneisen Gesellschaft Mbh | Verwendung von Faserbüscheln als Verankerungselement im Betonbau |
FR2918689B1 (fr) * | 2007-07-09 | 2012-06-01 | Freyssinet | Procede de renforcement d'un ouvrage de construction, et ouvrage ainsi renforce. |
FR2948712B1 (fr) * | 2009-08-03 | 2015-03-06 | Soletanche Freyssinet | Procede de renforcement d'une structure de construction, et ouvrage ainsi renforce |
US9085898B2 (en) | 2013-03-04 | 2015-07-21 | Fyfe Co. Llc | System and method of reinforcing a column positioned proximate a blocking structure |
EP3168384A1 (fr) * | 2014-07-09 | 2017-05-17 | Faculdade De Ciências E Tecnologia Da Universidade | Système de renforcement structural avec armatures ancrées intérieurement par adhérence |
US9757599B2 (en) | 2014-09-10 | 2017-09-12 | Dymat Construction Products, Inc. | Systems and methods for fireproofing cables and other structural members |
CN111608418B (zh) * | 2020-05-26 | 2021-08-03 | 华中科技大学 | 一种带嵌入式锚固装置的frp筋及其应用方法 |
CN113585806A (zh) * | 2021-08-26 | 2021-11-02 | 合肥工业大学 | 一种柔性铆钉锚固双向纤维布加固钢筋混凝土柱的方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2510262A1 (de) * | 1975-03-08 | 1976-09-09 | Hans Binker | Verfahren zur erhoehung der festigkeit von hoelzern und anderen baustoffen |
CH687399A5 (de) * | 1992-04-06 | 1996-11-29 | Eidgenoessische Materialpruefung | Verfahren und Vorrichtung zur Schubverstaerkung an einem Bauwerkteil. |
FR2700805B1 (fr) * | 1993-01-27 | 1995-04-07 | Ind Entreprise | Procédé de renforcement d'une poutre détériorée, et poutre ainsi obtenue. |
US5649398A (en) * | 1994-06-10 | 1997-07-22 | Hexcel-Fyfe L.L.C. | High strength fabric reinforced walls |
-
1996
- 1996-10-16 FR FR9612619A patent/FR2754556B1/fr not_active Expired - Lifetime
-
1997
- 1997-10-14 DE DE69722125T patent/DE69722125D1/de not_active Expired - Lifetime
- 1997-10-14 PT PT97402421T patent/PT837202E/pt unknown
- 1997-10-14 ES ES97402421T patent/ES2198538T3/es not_active Expired - Lifetime
- 1997-10-14 DK DK97402421T patent/DK0837202T3/da active
- 1997-10-14 EP EP97402421A patent/EP0837202B1/fr not_active Expired - Lifetime
- 1997-10-14 EP EP97402420A patent/EP0837201A1/fr not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101343950B (zh) * | 2006-10-24 | 2012-02-01 | 菲尔(香港)有限公司 | 用于混凝土结构加固的锚固件、其制作方法及使用方法 |
Also Published As
Publication number | Publication date |
---|---|
EP0837201A1 (fr) | 1998-04-22 |
EP0837202A1 (fr) | 1998-04-22 |
DE69722125D1 (de) | 2003-06-26 |
FR2754556B1 (fr) | 1998-12-18 |
ES2198538T3 (es) | 2004-02-01 |
PT837202E (pt) | 2003-09-30 |
FR2754556A1 (fr) | 1998-04-17 |
DK0837202T3 (da) | 2003-09-22 |
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