FR2691739A1 - Repairing corrosion-deteriorated reinforced beam - by cutting away deteriorated portion and making perpendicular channel in beam to receive inverted T=shaped reinforcing elements, e.g. of fibre-reinforced compsn. material - Google Patents
Repairing corrosion-deteriorated reinforced beam - by cutting away deteriorated portion and making perpendicular channel in beam to receive inverted T=shaped reinforcing elements, e.g. of fibre-reinforced compsn. material Download PDFInfo
- Publication number
- FR2691739A1 FR2691739A1 FR9206636A FR9206636A FR2691739A1 FR 2691739 A1 FR2691739 A1 FR 2691739A1 FR 9206636 A FR9206636 A FR 9206636A FR 9206636 A FR9206636 A FR 9206636A FR 2691739 A1 FR2691739 A1 FR 2691739A1
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- FR
- France
- Prior art keywords
- reinforced
- deteriorated
- resin
- sole
- reinforcing
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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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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
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- 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)
- Bridges Or Land Bridges (AREA)
Abstract
Description
La présente invention concerne un procédé de renforcement d'une poutre détériorée en béton armé et une poutre obtenue selon ce procédé. The present invention relates to a method for reinforcing a deteriorated beam of reinforced concrete and a beam obtained by this method.
Ces poutres en béton armé comportent généralement une zone de traction ou des zones de traction dans lesquelles sont disposés des moyens de renforcement métalliques, tels que par exemple des fers à béton et sur la face supérieure de laquelle s'étend une nervure de renfort. These reinforced concrete beams generally comprise a traction zone or traction zones in which are arranged metal reinforcing means, such as for example concrete irons and on the upper face of which extends a reinforcing rib.
La partie inférieure de ces poutres a tendance à se détériorer notamment en raison de la corrosion des moyens de renforcement. The lower part of these beams tends to deteriorate in particular due to the corrosion of the reinforcing means.
On conçoit que cette détérioration et cette corrosion engendrent des problèmes d'affaiblissement de ces poutres. It is understood that this deterioration and this corrosion cause problems of weakening of these beams.
Aucune solution satisfaisante n'ayant été développée dans l'état de la technique, pour permettre une réparation de ces poutres, on était alors amené à les remplacer. No satisfactory solution having been developed in the state of the art, to allow a repair of these beams, we were then led to replace them.
On conçoit que ceci présente un certain nombre d'inconvénients notamment au niveau du temps nécessaire pour réaliser ces opérations et du coût de celles-ci. It is understood that this has a certain number of drawbacks, in particular in terms of the time necessary to carry out these operations and the cost thereof.
On connait déjà dans l'état de la technique, par exemple du brevet FR-A-2 596 443, un procédé de restauration d'un élément de structure en bois. Already known in the prior art, for example from patent FR-A-2,596,443, a method of restoring a wooden structural element.
Celui-ci consiste à former une découpe s'étendant entre deux parties de bois sain ou une partie de bois sain et un support, à disposer dans cette découpe un renforcement, et ensuite à remplir complétement cette découpe d'un mastic plastique liquide formant joint mécanique. This consists of forming a cutout extending between two parts of healthy wood or a part of healthy wood and a support, placing a reinforcement in this cutout, and then completely filling this cutout with a liquid plastic sealant forming a joint. mechanical.
On connait également du brevet- CH-A-419 560, un procédé d'obturation d'une fente dans un ouvrage de maçonnerie, selon lequel on fore une série de trous dans cet ouvrage au droit de la fente, on engage un tube dans chacun des trous, on bouche l'entrée de ces trous, on colmate la fente en surface de l'ouvrage à l'aide d'un produit formant joint, puis on injecte sous pression dans les tubes, un produit d'obturation qui s'insinue dans la fente et l'obture. We also know from patent-CH-A-419,560, a process for closing a slot in a masonry work, according to which a series of holes are drilled in this work in line with the slot, a tube is engaged in each of the holes, the entrance to these holes is plugged, the slit on the surface of the work is plugged with a sealant, then a sealant is injected under pressure into the tubes. insinuates into the slit and closes it.
On conçoit que les procédés décrits dans ces documents ne sont pas adaptables au renforcement d'une poutre en béton armé détériorée car les contraintes qui s'appliquent sur de telles poutres sont extrêmement élevées de sorte qu'il est nécessaire d'obtenir un renforcement extrêmement résistant et fiable. It is understood that the methods described in these documents are not adaptable to the reinforcement of a deteriorated reinforced concrete beam because the stresses which apply to such beams are extremely high so that it is necessary to obtain an extremely reinforced resistant and reliable.
Le but de l'invention est donc de résoudre ces problèmes en proposant un procédé de renforcement qui soit simple, facile à mettre en oeuvre et qui permette de renforcer une poutre en béton armé détériorée afin que celle-ci puisse supporter à nouveau des efforts au moins aussi importants qu'unie poutre neuve. The object of the invention is therefore to solve these problems by proposing a reinforcement method which is simple, easy to implement and which makes it possible to reinforce a deteriorated reinforced concrete beam so that it can again withstand stresses at less as important as a new beam.
A cet effet, l'invention a pour objet un procédé de renforcement d'une poutre détériorée en béton armé, comportant une semelle dans la partie inférieure de laquelle sont disposés des moyens de renforcement métalliques et sur la face supérieure de laquelle s'étend une nervure de renfort, la partie inférieure de la poutre étant détériorée, notamment en raison de la corrosion des moyens de renforcement, caractérisé en ce qu'il consiste a:
- enlever la partie détériorée de la poutre et les moyens de renforcement;
- réaliser une rainure débouchant en direction de la partie inférieure de la poutre, sur toute la longueur de celle-ci, dans la semelle et la nervure; et
- fixer dans la rainure et sur la face inférieure de la semelle de la poutre, un organe de renforcement présentant une section de forme générale en T.To this end, the subject of the invention is a method of reinforcing a deteriorated reinforced concrete beam, comprising a sole in the lower part of which are arranged metal reinforcing means and on the upper face of which extends a reinforcing rib, the lower part of the beam being deteriorated, in particular due to the corrosion of the reinforcing means, characterized in that it consists of:
- remove the deteriorated part of the beam and the reinforcement means;
- Make a groove opening towards the lower part of the beam, over the entire length thereof, in the sole and the rib; and
- fix in the groove and on the underside of the sole of the beam, a reinforcing member having a generally T-shaped section
Avantageusement, l'organe de renforcement est en matériau composite formé de résine renforcée de fibres. Advantageously, the reinforcing member is made of composite material formed of fiber-reinforced resin.
Selon un autre aspect, l'invention a également pour objet une poutre obtenue selon le procédé décrit précédemment. According to another aspect, the invention also relates to a beam obtained according to the method described above.
L'invention sera mieux comprise à l'aide de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels
- les Fig.l,2 et 3 représentent différentes étapes d'un procédé selon l'invention de renforcement d'une poutre détériorée en béton armé, la forme de cette poutre n'étant pas limitative.The invention will be better understood with the aid of the description which follows, given solely by way of example and made with reference to the appended drawings, in which
- Fig.l, 2 and 3 show different steps of a method according to the invention for strengthening a deteriorated beam of reinforced concrete, the shape of this beam is not limiting.
Sur ces figures, la poutre est désignée par la référence générale 1. In these figures, the beam is designated by the general reference 1.
Une telle poutre en béton armé comporte de manière générale une semelle 2 dans la partie inférieure de laquelle sont disposés des moyens de renforcement métalliques 3 tels que par exemple des fers à béton ou autres. Such a reinforced concrete beam generally comprises a sole 2 in the lower part of which are arranged metal reinforcing means 3 such as for example concrete irons or the like.
Sur la face supérieure de cette semelle, est prévue une nervure de renfort 4. A reinforcing rib 4 is provided on the upper face of this sole.
En général, la partie inférieure de la poutre et plus particulièrement de la semelle de celle-ci, se détériore notamment en raison de la corrosion des moyens de renforcement métalliques. In general, the lower part of the beam and more particularly of the sole thereof, deteriorates in particular due to the corrosion of the metallic reinforcing means.
On conçoit alors que cette partie de la semelle de la poutre s'écaille et que la poutre est de moins en moins apte à supporter des charges importantes. It can therefore be seen that this part of the sole of the beam flakes off and that the beam is less and less able to support heavy loads.
Cette partie détériorée de la semelle de la poutre est désignée par la référence générale 5 sur la
Fig.l.This deteriorated part of the beam sole is designated by the general reference 5 on the
Fig.l.
Le procédé de renforcement selon l'invention permet de restructurer ces poutres détériorées et comporte plusieurs étapes qui sont illustrées sur les Fig.2 et 3. The reinforcement method according to the invention makes it possible to restructure these deteriorated beams and comprises several stages which are illustrated in FIGS. 2 and 3.
La première étape du procédé de renforcement selon l'invention consiste comme on peut le voir sur la
Fig.2, à enlever la partie détériorée 5 de la semelle de la poutre et les moyens de renforcement 3.The first step of the reinforcement method according to the invention consists, as can be seen in the
Fig. 2, to remove the deteriorated part 5 of the sole of the beam and the reinforcement means 3.
Une fois cette opération terminée, on réalise dans cette poutre, par exemple par fraisage, une rainure désignée par la référence générale 6 sur la Fig.3. Once this operation is completed, a groove is designated in this beam, for example by milling, designated by the general reference 6 in FIG. 3.
Plus particulièrement, cette rainure débouche en direction de la face inférieure de la poutre et s'étend sur toute la longueur de celle-ci, dans la semelle 2 et la nervure 4. More particularly, this groove opens in the direction of the underside of the beam and extends over the entire length of the latter, in the sole 2 and the rib 4.
Une fois cette opération de frai sage de la rainure terminée, on applique sur la face inférieure de la semelle et sur les surfaces de la rainure, une couche de résine d'imprégnation puis une couche de résine d'accrochage. Once this grooving operation has been completed, a layer of impregnating resin is applied to the underside of the sole and to the surfaces of the groove, then a layer of bonding resin.
Ces couches de résines sont désignées par la référence générale 7 sur la Fig.3 et permettent lors d'une dernière étape du procédé selon l'invention de fixer dans la rainure et sur la face inférieure de la semelle de la poutre, un organe de renforcement désigné par la référence générale 8, présentant une section de forme générale en T. These layers of resins are designated by the general reference 7 in FIG. 3 and allow, during a last step of the method according to the invention, to fix in the groove and on the underside of the sole of the beam, a reinforcement designated by the general reference 8, having a generally T-shaped section.
Ainsi, la branche verticale de 1 ' organe en T s'étend et est fixée dans la rainure 6 ménagée dans la poutre, tandis que les deux branches horizontales de celui-ci sont appliquées et fixées sur la face inférieure de la semelle 2, de part et d'autre de cette rainure. Thus, the vertical branch of the T-shaped member extends and is fixed in the groove 6 formed in the beam, while the two horizontal branches of the latter are applied and fixed on the underside of the sole 2, on either side of this groove.
Cet organe de renforcement 8 peut être réalisé en matériau composite formé de résine renforcée de fibres, comme par exemple une résine polyester renforcée de fibres de verre. This reinforcing member 8 can be made of composite material formed of fiber reinforced resin, such as for example a polyester resin reinforced with glass fibers.
La résine d'accrochage peut quant à elle être constituée par une résine époxy. The bonding resin can in turn consist of an epoxy resin.
Bien entendu, d'autres résines et d'autres fibres peuvent être utilisées. Of course, other resins and other fibers can be used.
D'autres modes de fixation de cet organe de renforcement peuvent également être envisagés. Other methods of fixing this reinforcing member can also be envisaged.
On conçoit alors qu'après durcissement des différentes résines, la poutre en béton, l'organe de renforcement en T et la liaison entre ces deux éléments forment une unité homogène qui peut supporter à nouveau les contraintes qui étaient prévues à l'origine sur celleci. It is therefore conceivable that after hardening of the various resins, the concrete beam, the T-shaped reinforcement member and the connection between these two elements form a homogeneous unit which can again withstand the stresses which were originally provided for on it .
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9206636A FR2691739B1 (en) | 1992-06-02 | 1992-06-02 | PROCESS FOR REINFORCING A DETERIORATED BEAM IN REINFORCED CONCRETE AND BEAM OBTAINED ACCORDING TO THIS PROCESS. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9206636A FR2691739B1 (en) | 1992-06-02 | 1992-06-02 | PROCESS FOR REINFORCING A DETERIORATED BEAM IN REINFORCED CONCRETE AND BEAM OBTAINED ACCORDING TO THIS PROCESS. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2691739A1 true FR2691739A1 (en) | 1993-12-03 |
| FR2691739B1 FR2691739B1 (en) | 1999-09-17 |
Family
ID=9430330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9206636A Expired - Fee Related FR2691739B1 (en) | 1992-06-02 | 1992-06-02 | PROCESS FOR REINFORCING A DETERIORATED BEAM IN REINFORCED CONCRETE AND BEAM OBTAINED ACCORDING TO THIS PROCESS. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2691739B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999004116A1 (en) * | 1997-07-15 | 1999-01-28 | Bilfinger + Berger Bauaktiengesellschaft | Component |
| CN106917469A (en) * | 2017-04-18 | 2017-07-04 | 沈阳理工大学 | Steel plate concrete composite reinforcement reinforced beam anti-fatigue performance structure and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1434075A1 (en) * | 1961-05-26 | 1968-10-31 | Ney Gyl Labor Kg | Process for the subsequent or additional reinforcement of components made of concrete |
| DE2510262A1 (en) * | 1975-03-08 | 1976-09-09 | Hans Binker | Strength improvement for timber beams - uses fibre bundles and webbing embedded in grooves along longitudinal faces |
| DE2909179A1 (en) * | 1979-03-08 | 1980-09-11 | Harry Haase | Reinforced concrete with increased load carrying capacity - obtd. by coating concrete with multiple layers of plastic laminates contg. glass fibre mats or rovings |
| EP0269497A1 (en) * | 1986-11-04 | 1988-06-01 | Philippe Wolf | Reinforcement of supporting structure elements by inserting highly resistant plates |
| US5044139A (en) * | 1989-05-23 | 1991-09-03 | D. H. Blattner & Sons, Inc. | Method of replacing post tensioned beams |
-
1992
- 1992-06-02 FR FR9206636A patent/FR2691739B1/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1434075A1 (en) * | 1961-05-26 | 1968-10-31 | Ney Gyl Labor Kg | Process for the subsequent or additional reinforcement of components made of concrete |
| DE2510262A1 (en) * | 1975-03-08 | 1976-09-09 | Hans Binker | Strength improvement for timber beams - uses fibre bundles and webbing embedded in grooves along longitudinal faces |
| DE2909179A1 (en) * | 1979-03-08 | 1980-09-11 | Harry Haase | Reinforced concrete with increased load carrying capacity - obtd. by coating concrete with multiple layers of plastic laminates contg. glass fibre mats or rovings |
| EP0269497A1 (en) * | 1986-11-04 | 1988-06-01 | Philippe Wolf | Reinforcement of supporting structure elements by inserting highly resistant plates |
| US5044139A (en) * | 1989-05-23 | 1991-09-03 | D. H. Blattner & Sons, Inc. | Method of replacing post tensioned beams |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999004116A1 (en) * | 1997-07-15 | 1999-01-28 | Bilfinger + Berger Bauaktiengesellschaft | Component |
| DE19730174C2 (en) * | 1997-07-15 | 2001-12-06 | Bilfinger Berger Bau | Component |
| CN106917469A (en) * | 2017-04-18 | 2017-07-04 | 沈阳理工大学 | Steel plate concrete composite reinforcement reinforced beam anti-fatigue performance structure and method |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2691739B1 (en) | 1999-09-17 |
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| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20080229 |