US20090013625A1 - Method of Reinforcement of a Structure and Structure Thus Reinforced - Google Patents
Method of Reinforcement of a Structure and Structure Thus Reinforced Download PDFInfo
- Publication number
- US20090013625A1 US20090013625A1 US12/169,220 US16922008A US2009013625A1 US 20090013625 A1 US20090013625 A1 US 20090013625A1 US 16922008 A US16922008 A US 16922008A US 2009013625 A1 US2009013625 A1 US 2009013625A1
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- United States
- Prior art keywords
- anchoring element
- strands
- reinforcing wires
- secured
- fabric
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000002787 reinforcement Effects 0.000 title description 12
- 238000004873 anchoring Methods 0.000 claims abstract description 51
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 44
- 239000004744 fabric Substances 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 6
- 239000004567 concrete Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
- E04C5/073—Discrete reinforcing elements, e.g. fibres
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
- E02D27/08—Reinforcements for flat foundations
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
-
- 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
- E04G23/0229—Increasing or restoring the load-bearing capacity of building construction elements of foundations or foundation walls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
-
- 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
- E04G2023/0255—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements whereby the fiber reinforced plastic elements are stressed
Definitions
- This invention relates to the field of structural reinforcement of structures.
- the reinforcement In a standard method commonly applied, known as the L' Hermite method, the reinforcement consists of a steel sheet bonded onto concrete after preparation of the bonding surface.
- This standard method has undergone various developments, in particular taking account of the technological progress in materials and more particularly the development of substitute materials for sheet steel, which often gives rise to application problems and requires precautions to be taken against corrosion.
- reinforcement techniques have been introduced, based on composite materials in the form of bonded plates (see for example FR-A-2 594 871), then in the form of bonded fibres (for example EP 0 441 519) and bonded fabrics (see for example FR-A-2 747 146).
- the latter types of reinforcement have many advantages, in particular their ease of use and their suitability for application onto surfaces of various shapes.
- These reinforcements are suitable for reinforcing and/or repairing structures made in particular from brickwork or reinforced concrete, and are used on structural elements such as for example beams, posts, slabs and walls.
- This access can prove difficult and/or costly in certain structures, or when particular strength requirements for a building are desired.
- Examples of a part difficult to access include foundation slabs and embedded walls, in particular partially or totally embedded.
- the aim of this invention is to avoid the above drawbacks and to improve the reinforcement of structures, in particular in the case where a part of the structure is not directly accessible.
- the invention thus proposes a method for reinforcing a structure, comprising the following stages:
- the load transfer can be ensured between the part into which the anchoring element is incorporated and the part of the structure to the surface of which the layer of fabric is bonded.
- load transfers can advantageously be carried out between several areas or several parts of the structure and thus structures the strength of which is very significantly improved can be obtained. Such structures are capable of withstanding earthquakes effectively.
- the anchoring element can take many forms and can have different dimensions.
- An elongated shape is preferred, but it can easily be envisaged to give it a shape where two dimensions are of the same order of size, such as a plate.
- a cylindrical shape is advantageous, it is also possible to use parallelipedal anchorage elements. It is also possible to shape the anchoring element like a hairpin, where two cylinders are connected together by an arc.
- the anchoring element can comprise a return portion for threading the strands of reinforcing wires, but it can also be envisaged to secure the strands of reinforcing wires to the anchoring element by any other means such as for example by bonding to the reinforcing element or by tying the strands of reinforcing fibres onto the reinforcing element.
- the return portion can be made up of a hole, in particular oblong, in the anchoring element, but also by a curved part of the anchoring element which forms a loop or a hook, by a ring secured to the anchoring element, by the arc of a hairpin-shaped anchoring element, or by any other means capable of allowing the strands of reinforcing wires to be secured to the anchoring element.
- the invention also relates to a structure, a part of which comprises an anchoring element at least partially incorporated into and secured to said part, strands of reinforcing wires secured to the anchoring element where at least one portion of the strands of reinforcing wires protrudes from said part, at least one layer of fabric bonded with said part of the strands of reinforcing wires onto a surface of the structure.
- the invention also relates to an anchoring element having an elongated shape, in particular cylindrical, 30 comprising at one of its ends an oblong hole capable of allowing the threading of strands of reinforcing wires and forming a return portion of the strands.
- FIG. 1 shows a diagrammatic cross section perspective view of a structure according to the invention
- FIG. 2 shows a diagrammatic view of an anchoring element used in FIG. 1 .
- FIG. 1 shows a structure 1 according to the invention, where the structure 1 comprises a foundation slab 11 surmounted by a semi-embedded wall 12 .
- a slab 14 is fixed to the wall 12 .
- the wall 12 is surmounted by a wall 13 which protrudes from the ground.
- the foundation slab 11 , the semi-embedded wall 12 and the slab 14 are made of reinforced concrete and the wall 13 is made of brickwork.
- a vertical axis is shown by a broken line. By convention, it will be understood that this line limits the external face of the walls 12 and 13 and that the opposite face of these walls is an internal face.
- the level of the slab 14 is below the level of the ground 6 so that the face 15 of the semi-embedded wall 12 is accessible while the opposite face of this wall is embedded.
- the part of the semi-embedded wall 12 situated below the level of the slab 14 is for its part completely embedded, as is the foundation slab 11 .
- a cavity 2 has been cut at an angle in the wall 12 and the foundation slab 11 .
- the cavity 2 is approximately cylindrical and can measure several metres in length and have a diameter of the order of a few dozen centimetres.
- An anchoring element 3 comprising an end 33 through which strands of reinforcing wires have been threaded, has then been placed in the cavity 2 .
- a loop 41 has been formed with said strands so as to allow the strands to penetrate partially into the cavity 2 .
- the anchoring element 3 is fixed, for example with a cement or mortar or concrete grout, by filling the cavity 2 .
- FIG. 1 it is possible to see the area 21 of the internal face 15 of the wall 12 corresponding to the filling carried out after having placed and fixed another anchoring element 3 in the structure in a way similar to that described above.
- Portions 42 of strands of reinforcing wires protrude from this area 21 .
- Said portions 42 of strands of reinforcing wires are secured to the internal face 15 of the wall 12 by bonding with at least one layer of fabric 5 .
- the portions 42 of the strands of reinforcing wires are generally covered by at least one layer of fabric 5 , but it is also possible for them to be placed and bonded over a layer of fabric 5 . They can in particular be incorporated between two layers of fabric.
- the layer of fabric 5 is placed partially on the internal face 15 of the wall 12 and partially on the internal face 16 of the wall 13 . This results in an advantageous securing of the elements of the structure as a whole, in particular the foundation slab 11 and the walls 12 and 13 , which makes it possible in particular to increase the earthquake resistance of the structure 1 .
- the securing is carried out between superposed elements, but that the invention is in no way limited to this configuration and that according to the method of the invention, it is also possible to secure elements having a non-zero angle between them, and even perpendicular to each other. Similarly, it is possible to secure non-abutting elements in this way.
- FIG. 2 shows an example of anchoring element 3 according to the invention.
- This anchoring element 3 is composed of two parts, a part 31 having an elongated shape, in this case a cylinder, and a second part 33 which can be secured to the part 31 having an elongated shape.
- the part 31 comprises at one end a threaded area 32 , preferably of a smaller diameter than the remainder of this part 31 .
- the reinforcing element 3 is totally incorporated into the structure 1 and is thus protected from corrosion, allowing in particular the use of steel.
- the part 31 can be made of steel, in particular HA steel, or a composite, comprising long or short reinforcing fibres and a resin. This part 31 can be solid or hollow.
- the part 33 comprises an oblong hole 34 and a screw thread (not shown) to allow securing by screwing to the threaded area 32 of the part 31 .
- the part 33 is preferably compact and much shorter than the part 31 with an elongated shape.
- the oblong hole is designed for the strands of reinforcing wires to pass through and forms a return portion for said strands.
- a rounded contact surface 35 can be provided in the form of the eye of a needle in the area of the hole 34 in the part 33 where the strands will come into contact when the structure is under load.
- anchoring element according to the invention is not limited to the above embodiment, but could equally well be obtained by cold or hot forging of the end of a metal bar to form an oblong hole.
- An anchoring element of this type can also be produced with a strip of composite material.
- the invention is not limited to these types of embodiment and must be interpreted non-limitatively, encompassing any equivalent embodiment.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Emergency Management (AREA)
- Business, Economics & Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Method for reinforcing a structure (1), comprising the following stages:
-
- a) placing in one part (11, 12) of the structure (1) an anchoring element (3) secured to strands of reinforcing wires (41, 42) such that the anchoring element (3) is at least partially incorporated into the part (11, 12) of the structure (1) and in that at least one portion (42) of the strands of reinforcing wires protrudes from a part (12) of the structure (1);
- b) securing the anchoring element (3) to the part (11, 12) of the structure (1);
- c) applying at least one layer of fabric (5) onto a surface (15) of the structure (1) such that at least one part of the portion (42) of the protruding strands of reinforcing wires is secured to the surface (15) of the structure (1) by bonding said layer of fabric (5). Structure thus produced.
Anchoring element of a structure.
Description
- This invention relates to the field of structural reinforcement of structures.
- In this field, it is usual to bond reinforcements onto the parts of a structure to be reinforced, using suitable resins.
- In a standard method commonly applied, known as the L' Hermite method, the reinforcement consists of a steel sheet bonded onto concrete after preparation of the bonding surface. This standard method has undergone various developments, in particular taking account of the technological progress in materials and more particularly the development of substitute materials for sheet steel, which often gives rise to application problems and requires precautions to be taken against corrosion.
- Thus in recent years reinforcement techniques have been introduced, based on composite materials in the form of bonded plates (see for example FR-A-2 594 871), then in the form of bonded fibres (for example EP 0 441 519) and bonded fabrics (see for example FR-A-2 747 146). The latter types of reinforcement have many advantages, in particular their ease of use and their suitability for application onto surfaces of various shapes.
- These different types of bonded reinforcements very significantly improve the dynamic behaviour of the reinforced structure. Moreover, a breakage of the reinforcement itself is seldom observed.
- These reinforcements are suitable for reinforcing and/or repairing structures made in particular from brickwork or reinforced concrete, and are used on structural elements such as for example beams, posts, slabs and walls.
- They can also be used for connecting construction elements to each other.
- However, their use makes it necessary to gain access to the surfaces of the elements to be reinforced, in order to place the fibres on them in the areas to be reinforced.
- This access can prove difficult and/or costly in certain structures, or when particular strength requirements for a building are desired.
- The case of reinforcement against earthquakes can be mentioned, where it is appropriate not only to reinforce the elements constituting a structure, but also to provide general stability between the elements, and for example to provide a connection between elements of which a part is inaccessible or hidden.
- Examples of a part difficult to access include foundation slabs and embedded walls, in particular partially or totally embedded.
- In such cases, it can be envisaged to dig excavations, carry out the reinforcement, then backfill the excavations, but this would result in more extensive, costly and possibly complex works, for example in the case of party walls.
- The aim of this invention is to avoid the above drawbacks and to improve the reinforcement of structures, in particular in the case where a part of the structure is not directly accessible.
- The invention thus proposes a method for reinforcing a structure, comprising the following stages:
-
- a) placing in one portion of the structure an anchoring element secured to strands of reinforcing wires such that the anchoring element is at least partially incorporated into the part of the structure and in that at least one portion of the strands of reinforcing wires protrudes from a part of the structure.
- b) securing the anchoring element to the part of the structure;
- c) applying by bonding at least one layer of fabric onto a surface of the structure such that at least one part of the portion of the protruding strands of reinforcing wires is secured to the surface of the structure by bonding of said layer of fabric.
- Using the method according to the invention, it is possible to reinforce a structure by securing together elements of the structure to which access is difficult and/or direct access is not possible for structural repairs.
- After having secured the different elements, in particular the anchoring element to the structure, and the fibre strands to a surface of the structure by bonding of at least one layer of fabric, the load transfer can be ensured between the part into which the anchoring element is incorporated and the part of the structure to the surface of which the layer of fabric is bonded. Thus load transfers can advantageously be carried out between several areas or several parts of the structure and thus structures the strength of which is very significantly improved can be obtained. Such structures are capable of withstanding earthquakes effectively.
- According to different embodiments, which can be combined:
-
- the method also comprises a preliminary stage of creating a cavity, in particular by drilling, in the part of the structure in order to at least partially house the anchoring element;
- the strands of reinforcing wires include carbon fibres;
- the strands of reinforcing wires are preimpregnated with a resin;
- the anchoring element has an elongated shape, in particular approximately cylindrical;
- the anchoring element is made of metal, in particular steel, or a composite material, in particular comprising reinforcing fibres impregnated with a resin;
- the strands of reinforcing wires are secured to the anchoring element by threading said strands into a return portion situated at one end of the anchoring element;
- the anchoring element is secured to the part of the structure with a masonry fixing, in particular with a cement or concrete grout, or with a resin;
- the layer(s) of fabric bonded onto the surface of the structure connect(s) two different parts of the structure;
- the anchoring element is placed in a first part of the structure and at least one part of the portion of the protruding strands of reinforcing wires is secured by bonding a layer of fabric onto a surface of a second part of the structure.
- The anchoring element can take many forms and can have different dimensions. An elongated shape is preferred, but it can easily be envisaged to give it a shape where two dimensions are of the same order of size, such as a plate.
- Similarly, although a cylindrical shape is advantageous, it is also possible to use parallelipedal anchorage elements. It is also possible to shape the anchoring element like a hairpin, where two cylinders are connected together by an arc.
- The anchoring element can comprise a return portion for threading the strands of reinforcing wires, but it can also be envisaged to secure the strands of reinforcing wires to the anchoring element by any other means such as for example by bonding to the reinforcing element or by tying the strands of reinforcing fibres onto the reinforcing element.
- The return portion can be made up of a hole, in particular oblong, in the anchoring element, but also by a curved part of the anchoring element which forms a loop or a hook, by a ring secured to the anchoring element, by the arc of a hairpin-shaped anchoring element, or by any other means capable of allowing the strands of reinforcing wires to be secured to the anchoring element.
- The operation of bonding at least one layer of fabric can be carried out according to the information contained in
patent FR 2 747 146 or according to any other fabric bonding technique known to a person skilled in the art. - The invention also relates to a structure, a part of which comprises an anchoring element at least partially incorporated into and secured to said part, strands of reinforcing wires secured to the anchoring element where at least one portion of the strands of reinforcing wires protrudes from said part, at least one layer of fabric bonded with said part of the strands of reinforcing wires onto a surface of the structure.
- The invention also relates to an anchoring element having an elongated shape, in particular cylindrical, 30 comprising at one of its ends an oblong hole capable of allowing the threading of strands of reinforcing wires and forming a return portion of the strands.
- According to different embodiments, which can be combined:
-
- the anchoring element comprises a first part having an elongated shape, in particular a bar or a strip, and a second part secured to the first part, in particular by screwing, where the second part comprises the oblong hole;
- the anchoring element is made of steel or a composite material.
- Other characteristics and advantages of this invention will become apparent in the description below of non-limitative embodiments, with reference to the attached drawings, in which:
-
FIG. 1 shows a diagrammatic cross section perspective view of a structure according to the invention; -
FIG. 2 shows a diagrammatic view of an anchoring element used inFIG. 1 . - For reasons of clarity, the dimensions of the different elements shown in these figures are not necessarily proportional to their actual dimensions. On the figures, identical references correspond to identical elements.
-
FIG. 1 shows a structure 1 according to the invention, where the structure 1 comprises a foundation slab 11 surmounted by asemi-embedded wall 12. Aslab 14 is fixed to thewall 12. Thewall 12 is surmounted by awall 13 which protrudes from the ground. As an example, the foundation slab 11, thesemi-embedded wall 12 and theslab 14 are made of reinforced concrete and thewall 13 is made of brickwork. - A vertical axis is shown by a broken line. By convention, it will be understood that this line limits the external face of the
walls - In the structure shown, the level of the
slab 14 is below the level of the ground 6 so that theface 15 of thesemi-embedded wall 12 is accessible while the opposite face of this wall is embedded. The part of thesemi-embedded wall 12 situated below the level of theslab 14 is for its part completely embedded, as is thefoundation slab 11. - In order to reinforce this structure, a
cavity 2 has been cut at an angle in thewall 12 and the foundation slab 11. In the example shown, thecavity 2 is approximately cylindrical and can measure several metres in length and have a diameter of the order of a few dozen centimetres. - An anchoring element 3, comprising an
end 33 through which strands of reinforcing wires have been threaded, has then been placed in thecavity 2. A loop 41 has been formed with said strands so as to allow the strands to penetrate partially into thecavity 2. The anchoring element 3 is fixed, for example with a cement or mortar or concrete grout, by filling thecavity 2. InFIG. 1 it is possible to see the area 21 of theinternal face 15 of thewall 12 corresponding to the filling carried out after having placed and fixed another anchoring element 3 in the structure in a way similar to that described above.Portions 42 of strands of reinforcing wires protrude from this area 21. Saidportions 42 of strands of reinforcing wires are secured to theinternal face 15 of thewall 12 by bonding with at least one layer offabric 5. - It is possible to pre-bond the
portions 42 of the strands of reinforcing wires onto theface 15, then to apply the layer(s) offabric 5, or to proceed with a single bonding operation. Theportions 42 of the strands of reinforcing wires are generally covered by at least one layer offabric 5, but it is also possible for them to be placed and bonded over a layer offabric 5. They can in particular be incorporated between two layers of fabric. - The layer of
fabric 5 is placed partially on theinternal face 15 of thewall 12 and partially on theinternal face 16 of thewall 13. This results in an advantageous securing of the elements of the structure as a whole, in particular thefoundation slab 11 and thewalls - It should be noted that in the structure shown, the securing is carried out between superposed elements, but that the invention is in no way limited to this configuration and that according to the method of the invention, it is also possible to secure elements having a non-zero angle between them, and even perpendicular to each other. Similarly, it is possible to secure non-abutting elements in this way.
-
FIG. 2 shows an example of anchoring element 3 according to the invention. This anchoring element 3 is composed of two parts, apart 31 having an elongated shape, in this case a cylinder, and asecond part 33 which can be secured to thepart 31 having an elongated shape. - The
part 31 comprises at one end a threadedarea 32, preferably of a smaller diameter than the remainder of thispart 31. - It is noted that in the embodiment exemplified in
FIG. 1 , the reinforcing element 3 is totally incorporated into the structure 1 and is thus protected from corrosion, allowing in particular the use of steel. - The
part 31 can be made of steel, in particular HA steel, or a composite, comprising long or short reinforcing fibres and a resin. Thispart 31 can be solid or hollow. - The
part 33 comprises anoblong hole 34 and a screw thread (not shown) to allow securing by screwing to the threadedarea 32 of thepart 31. Thepart 33 is preferably compact and much shorter than thepart 31 with an elongated shape. The oblong hole is designed for the strands of reinforcing wires to pass through and forms a return portion for said strands. In order to avoid damaging these strands, for example while they are being threaded through thehole 34 and/or when the anchoring element and the strands are placed in a structure and force is applied to the strands, arounded contact surface 35 can be provided in the form of the eye of a needle in the area of thehole 34 in thepart 33 where the strands will come into contact when the structure is under load. - It is also possible to assemble the
part 33 with thepart 31 having an elongated shape by hot or cold crimping or by bonding. - It is noted that the anchoring element according to the invention is not limited to the above embodiment, but could equally well be obtained by cold or hot forging of the end of a metal bar to form an oblong hole.
- An anchoring element of this type can also be produced with a strip of composite material. The invention is not limited to these types of embodiment and must be interpreted non-limitatively, encompassing any equivalent embodiment.
Claims (11)
1. Method for reinforcing a structure (1), comprising the following stages:
a) placing in one part (11, 12) of the structure (1) an anchoring element (3) secured to strands of reinforcing wires (41, 42) such that the anchoring element (3) is at least partially incorporated into the part (11, 12) of the structure (1) and in that at least one portion (42) of the strands of reinforcing wires protrudes from a part (12) of the structure (1);
b) securing the anchoring element (3) to the part (11, 12) of the structure (1);
c) applying at least one layer of fabric (5) by bonding onto a surface (15) of the structure (1) such that at least one part of the portion (42) of the protruding strands of reinforcing wires is secured to the surface (15) of the structure (1) by bonding of said layer of fabric (5).
2. Method according to the previous claim also comprising a preliminary stage of creating a cavity (2), in particular by drilling, in the part (11, 12) of the structure (1) in order to at least partially house the anchoring element (3).
3. Method according to claim 1 characterized in that the strands of reinforcing wires comprise carbon fibres.
4. Method according to claim 1 characterized in that the strands of reinforcing wires are pre-impregnated with a resin.
5. Method according to claim 1 characterized in that the anchoring element (3) has an elongated shape, in particular approximately cylindrical.
6. Method according to claim 1 characterized in that the anchoring element (3) is made of metal, in particular steel, or a composite material, in particular comprising reinforcing fibres impregnated with a resin.
7. Method according to claim 1 characterized in that the strands of reinforcing wires are secured to the anchoring element (3) by threading said strands into a return portion (33) situated at one end of the anchoring element (3).
8. Method according to claim 1 characterized in that the anchoring element (3) is secured to the part (11, 12) of the structure with a masonry fixing, in particular with a cement or concrete grout, or with a resin.
9. Method according to claim 1 characterized in that the layer(s) of fabric bonded onto the surface (15) of the structure (1) connect two different parts of the structure.
10. Method according to claim 1 characterized in that the anchoring element (3) is placed in a first part (11) of the structure (1) and at least one part of the portion (42) of the protruding strands of reinforcing wires is secured by bonding of a layer of fabric (5) onto a surface of a second part (12) of the structure (1).
11. Structure, of which a part (11, 12) comprises an anchoring element (3) at least partially incorporated into and secured to said part (11, 12), strands of reinforcing wires secured to the anchoring element (3) where at least one portion (42) of the strands of reinforcing wires protrudes from said part (12), at least one layer of fabric (5) bonded with said part (42) of the strands of reinforcing wires onto a surface (15) of the structure (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0704962A FR2918689B1 (en) | 2007-07-09 | 2007-07-09 | METHOD FOR REINFORCING A CONSTRUCTION WORK, AND STRENGTHENING THE STRUCTURE |
FR0704962 | 2007-07-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090013625A1 true US20090013625A1 (en) | 2009-01-15 |
Family
ID=38984606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/169,220 Abandoned US20090013625A1 (en) | 2007-07-09 | 2008-07-08 | Method of Reinforcement of a Structure and Structure Thus Reinforced |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090013625A1 (en) |
CA (1) | CA2636921C (en) |
ES (1) | ES2342527B2 (en) |
FR (1) | FR2918689B1 (en) |
GB (1) | GB2450988B (en) |
HK (1) | HK1127104A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110036029A1 (en) * | 2009-08-03 | 2011-02-17 | Soletanche Freyssinet | Process for reinforcing a construction structure, and structure thus reinforced |
US20150248156A1 (en) * | 2014-03-03 | 2015-09-03 | Canon Kabushiki Kaisha | Information processing apparatus |
US20160053503A1 (en) * | 2014-08-19 | 2016-02-25 | Kulstoff Composite Products, LLC | Fiber reinforced anchors and connectors, methods of making anchors and connectors, and processes for reinforcing a structure |
US20160138285A1 (en) * | 2013-06-06 | 2016-05-19 | Sika Technology Ag | Arrangement and method for reinforcing supporting structures |
US20200141082A1 (en) * | 2017-07-04 | 2020-05-07 | Takeuchi Construction Co., Ltd. | Foundation structure for building, and construction method therefor |
US10689869B1 (en) * | 2018-05-16 | 2020-06-23 | Robert K. Brown | System method and device for structural repair |
EP3819431A1 (en) * | 2019-11-08 | 2021-05-12 | CBP Guideway Systems GmbH | Reinforcing device for an existing structure, reinforcement arrangement comprising an existing structure and a reinforcing device of this type attached to same and method for reinforcing such an existing structure |
US11236508B2 (en) * | 2018-12-12 | 2022-02-01 | Structural Technologies Ip, Llc | Fiber reinforced composite cord for repair of concrete end members |
US20220259876A1 (en) * | 2021-02-15 | 2022-08-18 | CFS Materials, LLC | Wall Reinforcement Systems |
Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3044919A (en) * | 1957-05-16 | 1962-07-17 | Owens Corning Fiberglass Corp | Method of applying facing material to a wall surface |
US3422586A (en) * | 1966-05-12 | 1969-01-21 | Domenico Parma | System for post-stressing concrete slabs,beams or other structures |
US3738071A (en) * | 1970-08-21 | 1973-06-12 | Dyckerhoff & Widmann Ag | Tension element for constructing a prestressed tension anchor in the ground |
US4000623A (en) * | 1974-05-31 | 1977-01-04 | Pietro Meardi | Anchor rod for walls, bulkheads and the like |
US4069677A (en) * | 1975-06-20 | 1978-01-24 | Kabushiki Kaisha Nitto Tekuno Group | Anchor and method for constructing same |
US4125978A (en) * | 1977-09-09 | 1978-11-21 | Schildge Jr Adam T | Parapet reinforcement system for buildings |
US4442646A (en) * | 1980-10-28 | 1984-04-17 | Ponteggi Est S.P.A. | Device for anchoring tensioning elements |
US5607527A (en) * | 1992-02-25 | 1997-03-04 | Hexcel Corporation | Method of making fabric reinforced concrete columns to provide earthquake protection |
US5649398A (en) * | 1994-06-10 | 1997-07-22 | Hexcel-Fyfe L.L.C. | High strength fabric reinforced walls |
US5813182A (en) * | 1996-10-23 | 1998-09-29 | Simpson Strong-Tie Company, Inc. | Strap tie connector |
US6330776B1 (en) * | 1997-09-16 | 2001-12-18 | Nippon Steel Corporation | Structure for reinforcing concrete member and reinforcing method |
US20040016200A1 (en) * | 2002-07-24 | 2004-01-29 | Fyfe Co., Llc. | Anchor and method for reinforcing a structure |
US20050252142A1 (en) * | 2004-04-07 | 2005-11-17 | Lau David T | Anchorage system for structural reinforcement of fiber reinforced plastic materials and the like |
US7010824B2 (en) * | 2003-06-02 | 2006-03-14 | Freyssinet International (Stup) | Method for anchoring parallel wire cables and suspension system for a construction work |
US7017312B1 (en) * | 2000-08-18 | 2006-03-28 | Mueller Lee W | Two-piece clinched plate tension/compression bracket |
US7056463B2 (en) * | 2001-05-24 | 2006-06-06 | Japan Science And Technology Agency | Method of manufacturing prestressed concrete |
US7065932B2 (en) * | 2003-10-06 | 2006-06-27 | Simpson Strong-Tie Company, Inc. | Top flange stud to plate tie |
US20070251169A1 (en) * | 2006-04-26 | 2007-11-01 | Dahl Kjell L | Grouted rebar dowel splice |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB439377A (en) * | 1934-08-15 | 1935-12-05 | Szerelmey Ltd | Improvements in or relating to means for renovating or restoring stonework |
FR2747146B1 (en) * | 1996-04-04 | 1998-07-10 | Freyssinet Int Stup | PROCESS FOR REINFORCING CIVIL ENGINEERING STRUCTURES USING STICKED CARBON FIBERS |
FR2754556B1 (en) * | 1996-10-16 | 1998-12-18 | Freyssinet Int Stup | METHOD FOR REINFORCING A CONSTRUCTION STRUCTURE, AND STRUCTURE THEREFORE |
DE29924305U1 (en) * | 1999-04-01 | 2002-09-05 | Bilfinger Berger Ag | Anchoring for a flat reinforcement element made of plastic |
-
2007
- 2007-07-09 FR FR0704962A patent/FR2918689B1/en active Active
-
2008
- 2008-07-08 CA CA2636921A patent/CA2636921C/en not_active Expired - Fee Related
- 2008-07-08 US US12/169,220 patent/US20090013625A1/en not_active Abandoned
- 2008-07-09 ES ES200802040A patent/ES2342527B2/en not_active Expired - Fee Related
- 2008-07-09 GB GB0812530.4A patent/GB2450988B/en not_active Expired - Fee Related
-
2009
- 2009-07-13 HK HK09106224.6A patent/HK1127104A1/en not_active IP Right Cessation
Patent Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3044919A (en) * | 1957-05-16 | 1962-07-17 | Owens Corning Fiberglass Corp | Method of applying facing material to a wall surface |
US3422586A (en) * | 1966-05-12 | 1969-01-21 | Domenico Parma | System for post-stressing concrete slabs,beams or other structures |
US3738071A (en) * | 1970-08-21 | 1973-06-12 | Dyckerhoff & Widmann Ag | Tension element for constructing a prestressed tension anchor in the ground |
US4000623A (en) * | 1974-05-31 | 1977-01-04 | Pietro Meardi | Anchor rod for walls, bulkheads and the like |
US4069677A (en) * | 1975-06-20 | 1978-01-24 | Kabushiki Kaisha Nitto Tekuno Group | Anchor and method for constructing same |
US4125978A (en) * | 1977-09-09 | 1978-11-21 | Schildge Jr Adam T | Parapet reinforcement system for buildings |
US4442646A (en) * | 1980-10-28 | 1984-04-17 | Ponteggi Est S.P.A. | Device for anchoring tensioning elements |
US5607527A (en) * | 1992-02-25 | 1997-03-04 | Hexcel Corporation | Method of making fabric reinforced concrete columns to provide earthquake protection |
US5649398A (en) * | 1994-06-10 | 1997-07-22 | Hexcel-Fyfe L.L.C. | High strength fabric reinforced walls |
US5813182A (en) * | 1996-10-23 | 1998-09-29 | Simpson Strong-Tie Company, Inc. | Strap tie connector |
US6330776B1 (en) * | 1997-09-16 | 2001-12-18 | Nippon Steel Corporation | Structure for reinforcing concrete member and reinforcing method |
US7017312B1 (en) * | 2000-08-18 | 2006-03-28 | Mueller Lee W | Two-piece clinched plate tension/compression bracket |
US7056463B2 (en) * | 2001-05-24 | 2006-06-06 | Japan Science And Technology Agency | Method of manufacturing prestressed concrete |
US20040016200A1 (en) * | 2002-07-24 | 2004-01-29 | Fyfe Co., Llc. | Anchor and method for reinforcing a structure |
US7207149B2 (en) * | 2002-07-24 | 2007-04-24 | Fyfe Edward R | Anchor and method for reinforcing a structure |
US7010824B2 (en) * | 2003-06-02 | 2006-03-14 | Freyssinet International (Stup) | Method for anchoring parallel wire cables and suspension system for a construction work |
US7065932B2 (en) * | 2003-10-06 | 2006-06-27 | Simpson Strong-Tie Company, Inc. | Top flange stud to plate tie |
US20050252142A1 (en) * | 2004-04-07 | 2005-11-17 | Lau David T | Anchorage system for structural reinforcement of fiber reinforced plastic materials and the like |
US20070251169A1 (en) * | 2006-04-26 | 2007-11-01 | Dahl Kjell L | Grouted rebar dowel splice |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8925268B2 (en) | 2009-08-03 | 2015-01-06 | Soletanche Freyssinet | Process for reinforcing a construction structure, and structure thus reinforced |
US20110036029A1 (en) * | 2009-08-03 | 2011-02-17 | Soletanche Freyssinet | Process for reinforcing a construction structure, and structure thus reinforced |
US9574359B2 (en) * | 2013-06-06 | 2017-02-21 | Sika Technology Ag | Arrangement and method for reinforcing supporting structures |
US20160138285A1 (en) * | 2013-06-06 | 2016-05-19 | Sika Technology Ag | Arrangement and method for reinforcing supporting structures |
US20150248156A1 (en) * | 2014-03-03 | 2015-09-03 | Canon Kabushiki Kaisha | Information processing apparatus |
US9784004B2 (en) * | 2014-08-19 | 2017-10-10 | Kulstoff Composite Products, LLC | Fiber reinforced anchors and connectors, methods of making anchors and connectors, and processes for reinforcing a structure |
US20160053503A1 (en) * | 2014-08-19 | 2016-02-25 | Kulstoff Composite Products, LLC | Fiber reinforced anchors and connectors, methods of making anchors and connectors, and processes for reinforcing a structure |
US20200141082A1 (en) * | 2017-07-04 | 2020-05-07 | Takeuchi Construction Co., Ltd. | Foundation structure for building, and construction method therefor |
US10954647B2 (en) * | 2017-07-04 | 2021-03-23 | Takeuchi Construction Co., Ltd. | Foundation structure for building, and construction method therefor |
US10689869B1 (en) * | 2018-05-16 | 2020-06-23 | Robert K. Brown | System method and device for structural repair |
US11236508B2 (en) * | 2018-12-12 | 2022-02-01 | Structural Technologies Ip, Llc | Fiber reinforced composite cord for repair of concrete end members |
EP3819431A1 (en) * | 2019-11-08 | 2021-05-12 | CBP Guideway Systems GmbH | Reinforcing device for an existing structure, reinforcement arrangement comprising an existing structure and a reinforcing device of this type attached to same and method for reinforcing such an existing structure |
US20220259876A1 (en) * | 2021-02-15 | 2022-08-18 | CFS Materials, LLC | Wall Reinforcement Systems |
Also Published As
Publication number | Publication date |
---|---|
GB0812530D0 (en) | 2008-08-13 |
ES2342527B2 (en) | 2011-09-21 |
FR2918689A1 (en) | 2009-01-16 |
CA2636921A1 (en) | 2009-01-09 |
FR2918689B1 (en) | 2012-06-01 |
CA2636921C (en) | 2015-10-13 |
HK1127104A1 (en) | 2009-09-18 |
GB2450988B (en) | 2012-06-13 |
ES2342527A1 (en) | 2010-07-07 |
GB2450988A (en) | 2009-01-14 |
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