EP1007809A1 - Reinforcement device for supporting structures - Google Patents

Reinforcement device for supporting structures

Info

Publication number
EP1007809A1
EP1007809A1 EP98937382A EP98937382A EP1007809A1 EP 1007809 A1 EP1007809 A1 EP 1007809A1 EP 98937382 A EP98937382 A EP 98937382A EP 98937382 A EP98937382 A EP 98937382A EP 1007809 A1 EP1007809 A1 EP 1007809A1
Authority
EP
European Patent Office
Prior art keywords
lamella
cfrp
reinforcement device
flags
split
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.)
Granted
Application number
EP98937382A
Other languages
German (de)
French (fr)
Other versions
EP1007809B1 (en
Inventor
Gregor Schwegler
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.)
Sika Schweiz AG
Original Assignee
StressHead AG
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 StressHead AG filed Critical StressHead AG
Publication of EP1007809A1 publication Critical patent/EP1007809A1/en
Application granted granted Critical
Publication of EP1007809B1 publication Critical patent/EP1007809B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • E04C5/127—The tensile members being made of fiber reinforced plastics
    • 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
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
    • E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
    • 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
    • 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
    • E04G2023/0255—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
    • E04G2023/0259—Devices specifically adapted to stress the 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1059—Splitting sheet lamina in plane intermediate of faces

Definitions

  • the present invention relates to a
  • Reinforcement device according to the preamble of claim 1 and a method for reinforcing beams according to the preamble of claim 11.
  • Such supporting structures can be conventionally constructed walls made of brick or, for example, reinforced concrete walls or beams, wood, plastic or steel beams.
  • tensioning means in the form of strips made of metal or fiber-reinforced plastic via end anchorages.
  • tensioning means there is no flat connection of the tensioning means to the supporting structure, but only a connection to the supporting structure is provided in the two end anchoring points of the tensioning means.
  • tensioning devices are conventionally included in the planning of the supporting structure, since retrofitting is practically impossible or can only be carried out at great expense, since corresponding channels have to be created in the supporting structure for the tensioning devices.
  • CFRP lamellas carbon lamellas
  • CFRP lamellas carbon lamellas
  • They are advantageous here simple and inexpensive application of such slats, which have a higher strength than the steel slats at a much lower weight and are easier to store.
  • the corrosion resistance is also better, which is why such reinforcements also for the
  • the object of the present invention was to find a CFRP reinforcing lamella in which the force is introduced from the carrier into the ends in such a way that detachment is practically avoided and which is also suitable for the prestressing.
  • End element Force transmission into the ends of the CFRP lamella, which can also be easily pretensioned using such an end element.
  • the one trained in block form End element can now either be inserted into a recess in the carrier or in the preferred embodiment with wedge-shaped splitting with flat or rough bottom also simply glued and / or pegged to the carrier. be screwed.
  • This embodiment is particularly suitable for the prestressing, which is preferably carried out directly via the carrier part. For example, this can be done by bracing against a fitting part inserted into the carrier.
  • the splitting of the ends of the CFRP lamellae can preferably take place either in overlapping flags or in adjacent flags, respectively. in a combination of these two variants.
  • the ends of the CFRP slats can advantageously be split at the construction site itself in the lengths and dimensions required in each case.
  • This system is very universal for the reinforcement of practically any support components and can be used with or without pretension.
  • Figure 1 shows the cross section through a carrier with CFRP lamella according to the invention attached to the underside.
  • 2 shows the cross section through the head part of the CFRP lamella according to FIG. 1;
  • FIGS. 1 and 2 show the cross section through the end of a CFRP lamella according to FIGS. 1 and 2;
  • FIG. 4 shows the cross section through a carrier with a further CFRP lamella according to the invention attached to the underside;
  • FIG. 5 shows the cross section through the head part of the CFRP lamella according to FIG. 4;
  • FIG. 6 shows the schematic cross section through an alternative head part of a CFRP lamella according to the invention
  • FIG. 7 shows a schematic cross section through a further alternative head part of a CFRP lamella according to the invention.
  • Fig. 8 shows the supervision of a further alternative embodiment of the head part of a CFRP lamella.
  • FIG. 1 now shows the cross section through a support 1 to be reinforced.
  • the ends of the CFRP lamella 2 used for this purpose are inserted according to the invention in end elements, here anchor heads 3 and 4.
  • the anchor heads 3, 4 can be used in milled or tapered recesses in the carrier 1, as shown in this figure.
  • the CFRP lamella 2 is by means of Adhesive layer 5 is connected to the carrier 1 over the entire surface or partially, and the anchor heads 3, 4 are also glued to it.
  • the anchor heads 3, 4 can be connected to the carrier by a transverse tensioning device 6, shown here only purely schematically, which leads to a better introduction of force via the anchor heads 3, 4 from the CFRP lamella 2 into the carrier 1.
  • Cross-tensioning device 6 can be made, for example, via threaded rods or dowels guided through the carrier 1 and the anchor heads 3, 4.
  • the reinforcement device formed from the CFRP lamella 2 and the anchor heads 3, 4 can now also be simply pretensioned, as is shown schematically on the right-hand side of FIG.
  • an angle fitting 7 can be attached to the underside of the support 1, to which a tension rod 8, which is connected at one end to the anchor head 4, engages.
  • both anchor heads 3, 4 must be equipped with such a tensioning device for pretensioning.
  • the clamping device is attached before gluing and can, after the adhesive bond between the CFRP lamella 2 has hardened. the anchor heads 3, 4 and the support 1 can be removed again.
  • FIG. 2 now shows the cross section through one of the anchor heads 3.
  • the cuboid anchor head 3 there are preferably three guide or Holding slots 9 arranged one above the other, which can accommodate the end of the CFRP lamella 2, which is divided into three flags 2 *, as shown in FIG. 3.
  • the holding slots 9 are here arranged upwards and downwards wedge-shaped and have transverse bores 10. These holes 10 provide additional anchoring points for the adhesive, with which the flags 2 'of the CFRP lamella 2 are connected to the holding slots 9.
  • the big advantage lies in the splitting of the end of the lamella 2 into the flags 2 '. This splitting is preferably carried out in the fiber direction of the lamellae, and it is thus advantageously achieved to enlarge the adhesive surface without the strength properties of the CFRP lamellae 2 being impaired.
  • the adhesive area is tripled compared to a conventional lamella, which is only glued to the carrier at its end, and is still tripled compared to the known solution with a wedge-shaped recess in the carrier and adhesive bridges!
  • a transverse reinforcement 11 should preferably be attached, which is shown only schematically in FIG is indicated.
  • this transverse reinforcement 11 can be carried out by means of threaded rods which are guided through corresponding bores in the anchor head 3 and braced via nuts.
  • a threaded bore 12 is made in the anchor head 3, for example, into which a pretensioning device can be screwed, as is shown schematically in FIG.
  • FIG. 3 shows one end of the CFRP lamella 2 with the lamella end split into three flags 2 '.
  • the CFRP lamella can be split by conventional means after cutting to the desired length into the desired number, approximately equal flags 2 ', for example by means of a planer or knife.
  • the advantage here is that the quality of the splitting is subject to relatively low requirements; the division into the corresponding number of flags 2 ′ is essential in order to achieve the increase in area for the connection to the anchor head 3.
  • FIG. 4 shows the cross section through a carrier 1 with a reinforcement device according to the invention, which is attached to the underside (tension side) and consists of a CFRP lamella 2 with anchor heads 12 and 13 attached to the ends.
  • the anchor heads 12, 13 are now designed in such a way that that the CFRP lamella 2 practically emerges from the anchor heads 12, 13 at the level of the adhesive layer 5, and that they do not therefore have to be arranged sunk in the underside of the carrier 1, but also, for example, glued flatly to this underside can be.
  • the transverse tensioning devices 6 indicated in FIG. 1 can also be attached here in order to bring about a higher contact pressure and thus a higher tensile strength of the connection between the anchor heads 12, 13 and the underside of the beam.
  • These anchor heads 12, 13, like the embodiment already described above, can also be easily preloaded.
  • FIG. 5 now shows the cross section through an anchor head 12 and the corresponding arrangement of the holding slots 9.
  • the bottom slot 9 ' is parallel to the outer wall 12' of the anchor head 12 resting on the support 1, the remaining slots 9 are at an acute angle for this purpose arranged in a fan shape pointing towards the outside.
  • this arrangement brings the same advantages as already described by enlarging the bonding surface of the CFRP lamella 2, and on the other hand enables the anchor heads 12, 13 to be applied evenly without additional recesses on the carrier 1.
  • transverse reinforcement means 11 as shown schematically in FIG. 2, in order to prevent the armature heads 12, 13 from bending open or tearing open in the region of the exit of the CFRP lamella 2.
  • the anchor heads 3.4, respectively. 12, 13 is suitable on the one hand metal, which has high strength, easy workability and good
  • CFRP lamella 2 is split here into two superposed flags 2 ′, which come to rest on the outside of a wedge-shaped anchor head 14. You can in turn be connected to the surface of the anchor head 14 by gluing.
  • the split flags 2 'of the end of the CFRP lamella 2 are held in an anchor head formed from plates 15 arranged one above the other, as shown in longitudinal section in FIG.
  • an anchor head formed from plates 15 arranged one above the other, as shown in longitudinal section in FIG.
  • FIG. 8 also shows the supervision of a further embodiment of the end of the CFRP lamella 2.
  • the flags 2 ' are not formed one above the other, but are formed side by side.
  • the splitting is preferably carried out along the fiber direction of the CFRP lamella 2.
  • the reinforcement devices according to the invention are particularly suitable for the renovation of existing concrete support structures, such as ceilings or
  • Bridge girders can also be used for all known applications of conventional CFRP slats, such as masonry and Wooden structures.
  • the simple prestressing enables the strength properties of the CFRP lamellas to be utilized to a greater extent than in the previously known processes.
  • the preload causes a pre-pressing to take place on the tension side of an existing support element, which is particularly advantageous, for example, in the case of bridge girders.

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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)
  • Reinforcement Elements For Buildings (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Bridges Or Land Bridges (AREA)
  • Tents Or Canopies (AREA)
  • Electric Cable Installation (AREA)
  • Sewage (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)

Abstract

The ends of the carbon plates (2) reinforcing the supporting elements (1), such as concrete beams, are divided into at least two splines (2') having approximately the same thickness and are glued in the appropriate retaining slots (9) of a terminal element (3, 4, 12, 13), said splines forming an angle in relation to each other. This assembly is then glued to the traction side of the supporting element (1), whereby the carbon plates (2) are directly prestressed by the terminal elements (3, 4, 12, 13) in relation to the supporting element (1). The terminal element (3, 4, 12, 13) can be inserted into an appropriate groove in the supporting element (1) or glued directly on the surface of the supporting element (1) and/or doweled, optionally by using a transversal tensioning device.

Description

Verstärkungsvorrichtung für TragstrukturenReinforcement device for supporting structures
Die vorliegende Erfindung betrifft einThe present invention relates to a
Verstärkungsvorrichtung nach dem Oberbegriff von Anspruch 1 sowie ein Verfahren zur Verstärkung von Trägern nach dem Oberbegriff von Anspruch 11.Reinforcement device according to the preamble of claim 1 and a method for reinforcing beams according to the preamble of claim 11.
Bei der Sanierung von Tragstrukturen an bestehenden Bauten stellt sich oft das Problem, dass die Tragstruktur für neue Lastfälle, welche die ehemalige Dimensionierung übersteigen, angepasst werden soll. Um nicht die Tragstruktur in derartigen Fällen ganz zu ersetzen, sind Methoden und Vorrichtungen zur Verstärkung solcher bestehender Tragstrukturen gefunden worden. Solche Tragstrukturen können herkömmlich aufgebaute Wände aus Backstein sein oder beispielsweise Stahlbetonwände oder - träger, Holz- Kunststoff- oder Stahlträger sein.When renovating support structures on existing buildings, the problem often arises that the support structure should be adapted for new load cases that exceed the former dimensions. In order not to completely replace the supporting structure in such cases, methods and devices for strengthening such existing supporting structures have been found. Such supporting structures can be conventionally constructed walls made of brick or, for example, reinforced concrete walls or beams, wood, plastic or steel beams.
Seit längerem bekannt ist die Verstärkung solcher Tragstrukturen mit nachträglich aufgebrachten Stahlplatten. Die Stahlplatten, d.h. bandförmige Stahlbleche resp. Stahllamellen, werden dabei auf eine oder zwei Seiten der Tragkonstruktion aufgeklebt, vorzugsweise auf die auf Zug belasteten Seiten der Tragkonstruktion. Der Vorteil dieses Verfahrens bestand darin, dass es verhältnismässig rasch durchgeführt werden kann, allerdings hohe Anforderungen an die Klebung stellt, d.h. die Vorbereitung der Teile und die Durchführung der Klebung muss unter genau definiertenIt has long been known to reinforce such support structures with subsequently applied steel plates. The steel plates, i.e. band-shaped steel sheets resp. Steel slats are glued to one or two sides of the supporting structure, preferably to the tensile sides of the supporting structure. The advantage of this method was that it can be carried out relatively quickly, but places high demands on the adhesive, i.e. the preparation of the parts and the implementation of the gluing must be under precisely defined
Verhältnissen stattfinden, um die gewünschte Wirkung zu erreichen. Probleme bei dieser Methode treten insbesondere im Korrosionsbereich auf, d.h. wenn Tragkonstruktionen im Freien derart verstärkt werden sollen, wie beispielsweise Brückenträger. Aufgrund des verhältnismässig hohen Gewichtes und der Herstellung solcher Stahllamellen ist die maximale einsetzbare Länge beschränkt. Ebenfalls kann aus Platzgründen der Einsatz in geschlossenen Räumen problematisch sein, wenn die starren Stahllamellen nicht in den entsprechenden Raum transportiert werden können. Zudem sind die Stahllamellen bei Applikationen "über Kopf" bis zum Aushärten des Klebstoffes gegen die zu verstärkende Tragstruktur anzupressen, was ebenfalls einen hohen Aufwand bedeutet .Relationships take place to achieve the desired effect. Problems with this method occur particularly in the area of corrosion, ie when supporting structures in the Free should be reinforced in such a way, such as bridge girders. Due to the relatively high weight and the manufacture of such steel slats, the maximum usable length is limited. For space reasons, use in closed rooms can also be problematic if the rigid steel slats cannot be transported into the corresponding room. In addition, the steel lamellas in applications have to be pressed "upside down" until the adhesive hardens against the supporting structure to be reinforced, which also means a great deal of effort.
Es ist aus der FR 2 590 608 bekannt, Spannmittel in Form von Bändern aus Metall oder Faserverstärktem Kunststoff über Endverankerungen einzusetzen. Bei dieser Ausfuhrungsform erfolgt jedoch keine flächige Verbindung der Spannmittel mit der Tragkonstruktion, sondern es sind lediglich in den beiden Endverankerungspunkten der Spannmittel eine Verbindung mit der Tragkonstruktion vorgesehen. Derartige Spannmittel werden herkömmlicherweise bereits bei der Planung der Tragkonstruktion einbezogen, da eine nachträgliche Ausrüstung praktisch nicht oder nur mit sehr hohem Aufwand realisiert werden kann, da für die Spannmittel entsprechende Kanäle im Tragwerk erstellt werden müssen.It is known from FR 2 590 608 to use tensioning means in the form of strips made of metal or fiber-reinforced plastic via end anchorages. In this embodiment, however, there is no flat connection of the tensioning means to the supporting structure, but only a connection to the supporting structure is provided in the two end anchoring points of the tensioning means. Such tensioning devices are conventionally included in the planning of the supporting structure, since retrofitting is practically impossible or can only be carried out at great expense, since corresponding channels have to be created in the supporting structure for the tensioning devices.
Neuerdings werden nun auch Kohlenstofflamellen (CFK- Lamellen) auf die Zugseiten der Tragkonstruktion aufgeklebt und damit die Tragfähigkeit solcher Konstruktionen durch Erhöhung des Tragwiderstandes und der Duktilität nachträglich verbessert. Vorteilhaft dabei sind die einfache und kostengünstige Applikation solcher Lamellen, welche eine höhere Festigkeit als die Stahllamellen bei weitaus geringerem Gewicht aufweisen und einfacher zu lagern sind. Ebenfalls ist die Korrosionsbeständigkeit besser, weshalb solche Verstärkungen auch für dieRecently, carbon lamellas (CFRP lamellas) have now been glued to the tensile sides of the supporting structure, and the load-bearing capacity of such structures has subsequently been improved by increasing the bearing resistance and ductility. They are advantageous here simple and inexpensive application of such slats, which have a higher strength than the steel slats at a much lower weight and are easier to store. The corrosion resistance is also better, which is why such reinforcements also for the
Verstärkung von Tragkonstruktionen im Freien geeignet sind. Dabei hat sich nun aber besonders die Endverankerung der Lamellen als problematisch erwiesen. Gerade in diesem Bereich ist die Gefahr der Ablösung der Lamellen besonders gross und es besteht das Problem der Krafteinleitung vom Lamellenende in den Träger.Reinforcement of supporting structures are suitable outdoors. However, the final anchoring of the slats has proven to be particularly problematic. It is precisely in this area that the risk of the slats becoming detached is particularly great and there is the problem of the introduction of force from the slat end into the carrier.
Eine diesbezügliche Lösung ist aus der W096/21785 bekannt, bei welcher eine in einem flachen Winkel verlaufende Bohrung resp. keilförmige Ausnehmung im Träger angebracht wird, in welche die Enden der CFK-Lamellen eingebracht werden und ggf. mittels Bügel, Schlaufen, Platten etc. gegen den Träger angepresst werden. Dies führt nun bereits zu einer Verbesserung des Ablöseverhaltens und besseren Krafteinleitung vom Träger in die Lamelle. Allerdings werden derartige CFK-Lamellen ohne Vorspannung, d.h. schlaff, auf den Träger aufgeklebt. Damit wird jedoch ein grosser Teil des Verstärkungspotentials dieser Lamellen nicht genutzt, da diese erst nach Ueberschreiten der Grundlast, d.h. unter Beanspruchung durch die eigentliche Nutzlast, zu tragen beginnen.A related solution is known from W096 / 21785, in which a bore running at a flat angle, respectively. wedge-shaped recess is made in the carrier, into which the ends of the CFRP slats are introduced and, if necessary, pressed against the carrier by means of brackets, loops, plates, etc. This already leads to an improvement in the detachment behavior and better introduction of force from the carrier into the lamella. However, such CFRP slats are not pretensioned, i.e. limp, glued to the carrier. However, this means that a large part of the reinforcement potential of these slats is not used, since these only after the base load has been exceeded, i.e. under load from the actual payload, begin to carry.
Um die Lamellen besser auszunützen, ist nun der Gedanke aufgetaucht, diese vorgespannt auf den Träger aufzukleben. Eine bekannte Lösung sieht diesbezüglich vor, dass an den Enden der CFK-Lamellen beidseitig kurze Stahlplatten aufgeleimt werden, die Stahlplatten dann voneinander weg verspannt und damit die CFK-Lamelle vorgespannt werden und diese vorgespannte Anordnung mit dem zu verstärkenden Träger verleimt wird. Nach der Trocknung der Verleimung werden die Lamellen an den Enden mittels Platten, Schlaufen etc. gegen den Träger gepresst und anschliessend die Enden mit den Stahlplatten abgetrennt. Dieses Verfahren ist nun aber sehr aufwendig und kann auch nicht bei allen Anwendungsfällen eingesetzt werden. Die obig beschriebene Verankerungsart der Lamellenenden eignet sich nun aber nicht für die Vorspannung auf Baustellen.In order to make better use of the slats, the idea has now arisen of gluing them to the carrier in a prestressed manner. In this regard, a known solution provides for short steel plates on both sides at the ends of the CFRP slats are glued on, the steel plates are then clamped away from each other and thus the CFRP lamella are prestressed and this prestressed arrangement is glued to the support to be reinforced. After the glue has dried, the lamellae are pressed against the carrier at the ends by means of plates, loops etc., and the ends are then cut off with the steel plates. However, this process is now very complex and cannot be used in all applications. The type of anchoring of the slat ends described above is not suitable for prestressing on construction sites.
Die Aufgabe der vorliegenden Erfindung lag nun darin, eine CFK-Verstärkungslamelle zu finden, bei welcher die Krafteinleitung vom Träger in die Enden derart erfolgt, dass eine Ablösung praktisch vermieden wird und welche sich auch für die Vorspannung eignet.The object of the present invention was to find a CFRP reinforcing lamella in which the force is introduced from the carrier into the ends in such a way that detachment is practically avoided and which is also suitable for the prestressing.
Diese Aufgabe wird erfindungsgemäss durch eine CFK-Lamelle mit den Merkmalen von Anspruch 1 resp . durch das Verfahren nach Anspruch 11 gelöst. Bevorzugte Ausführungsformen der Erfindung ergeben sich aus den abhängigen Ansprüchen 2 bis 10 resp. 12 bis 14.This object is inventively by a CFRP lamella with the features of claim 1. solved by the method according to claim 11. Preferred embodiments of the invention result from the dependent claims 2 to 10 respectively. 12 to 14.
Durch das Aufspalten der Enden einer CFK-Lamelle in wenigstens zwei, vorzugsweise drei oder mehr Endfahnen wird die Oberfläche zur Verbindung mit einem Abschlusselement wesentlich vergrösser . Damit erfolgt nun eine guteBy splitting the ends of a CFRP lamella into at least two, preferably three or more end tabs, the surface area for connection to an end element is increased considerably. So now there is a good one
Krafteinleitung in die Enden der CFK-Lamelle, welche über ein solches Abschlusselement auch einfach vorgespannt werden können. Das in Blockform ausgebildete Abschlusselement kann nun entweder in eine Vertiefung im Träger eingesetzt werden oder in der bevorzugten Ausfuhrungsform mit keilförmiger Aufspaltung mit flachem oder rauhem Boden auch einfach auf den Träger flächig aufgeklebt und/oder verdübelt resp. verschraubt werden.Force transmission into the ends of the CFRP lamella, which can also be easily pretensioned using such an end element. The one trained in block form End element can now either be inserted into a recess in the carrier or in the preferred embodiment with wedge-shaped splitting with flat or rough bottom also simply glued and / or pegged to the carrier. be screwed.
Gerade diese Ausfuhrungsform eignet sich vorzüglich für die Vorspannung, welche vorzugsweise direkt über den Trägerteil erfolgt. Beispielsweise kann dies durch Verspannung gegenüber einem in den Träger eingesetzten Beschlagsteil erfolgen.This embodiment is particularly suitable for the prestressing, which is preferably carried out directly via the carrier part. For example, this can be done by bracing against a fitting part inserted into the carrier.
Die Aufspaltung der Enden der CFK-Lamellen kann vorzugsweise entweder in übereinanderliegende Fahnen oder nebeneinanderliegende Fahnen erfolgen, resp. in einer Kombination aus diesen beiden Varianten.The splitting of the ends of the CFRP lamellae can preferably take place either in overlapping flags or in adjacent flags, respectively. in a combination of these two variants.
Das Aufspalten der Enden der CFK-Lamellen kann vorteilhafterweise auf der Baustelle selbst in den jeweils erforderlichen Längen und Dimensionen erfolgen. Damit ist dieses System sehr universell für die Verstärkung von praktisch beliebigen Trägerbauteilen geeignet und kann mit oder auch ohne Vorspannung eingesetzt werden.The ends of the CFRP slats can advantageously be split at the construction site itself in the lengths and dimensions required in each case. This system is very universal for the reinforcement of practically any support components and can be used with or without pretension.
Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand von Figuren der beiliegenden Zeichnung noch näher erläuter . Es zeigenAn embodiment of the invention is explained in more detail below with reference to figures of the accompanying drawing. Show it
Fig. 1 den Querschnitt durch einen Träger mit auf der Unterseite angebrachter erfindungsgemässer CFK- Lamelle; Fig. 2 den Querschnitt durch den Kopfteil der CFK- Lamelle nach Figur 1 ;Figure 1 shows the cross section through a carrier with CFRP lamella according to the invention attached to the underside. 2 shows the cross section through the head part of the CFRP lamella according to FIG. 1;
Fig. 3 den Querschnitt durch das Ende einer CFK- Lamelle nach Figur 1 und 2 ;3 shows the cross section through the end of a CFRP lamella according to FIGS. 1 and 2;
Fig. 4 den Querschnitt durch einen Träger mit auf der Unterseite angebrachter weiterer erfindungsgemässer CFK-Lamelle;4 shows the cross section through a carrier with a further CFRP lamella according to the invention attached to the underside;
Fig. 5 den Querschnitt durch den Kopfteil der CFK- Lamelle nach Figur 4;5 shows the cross section through the head part of the CFRP lamella according to FIG. 4;
Fig. 6 den schematischen Querschnitt durch einen erfindungsgemässen alternativen Kopfteil einer CFK- Lamelle;6 shows the schematic cross section through an alternative head part of a CFRP lamella according to the invention;
Fig. 7 einen schematischen Querschnitt durch einen weiteren erfindungsgemässen alternativen Kopteil einer CFK-Lamelle;7 shows a schematic cross section through a further alternative head part of a CFRP lamella according to the invention;
Fig. 8 die Aufsicht auf eine weitere alternative Ausfuhrungsform des Kopfteils einer CFK-Lamelle.Fig. 8 shows the supervision of a further alternative embodiment of the head part of a CFRP lamella.
Figur 1 zeigt nun den Querschnitt durch einen zu verstärkenden Träger 1. Die Enden der hierfür eingesetzten CFK-Lamelle 2 sind erfindungsgemäss in Abschlusselemente, hier Ankerköpfen 3 und 4, eingesetzt. Die Ankerköpfe 3,4 können in gefrästen oder gespitzten Ausnehmungen des Trägers 1 eingesetzt werden, wie in dieser Figur dargestellt. Die CFK-Lamelle 2 wird mittels einer Kleberschicht 5 mit dem Träger 1 ganzflächig oder partiell verbunden, ebenso werden auch die Ankerköpfe 3,4 damit verklebt. Zusätzlich können die Ankerköpfe 3,4 durch eine Querspannvorrichtung 6, hier nur rein schematisch dargestellt, mit dem Träger verbunden sein, was zu einer besseren Krafteinleitung über die Ankerköpfe 3,4 von der CFK-Lamelle 2 in den Träger 1 führt . DiesFIG. 1 now shows the cross section through a support 1 to be reinforced. The ends of the CFRP lamella 2 used for this purpose are inserted according to the invention in end elements, here anchor heads 3 and 4. The anchor heads 3, 4 can be used in milled or tapered recesses in the carrier 1, as shown in this figure. The CFRP lamella 2 is by means of Adhesive layer 5 is connected to the carrier 1 over the entire surface or partially, and the anchor heads 3, 4 are also glued to it. In addition, the anchor heads 3, 4 can be connected to the carrier by a transverse tensioning device 6, shown here only purely schematically, which leads to a better introduction of force via the anchor heads 3, 4 from the CFRP lamella 2 into the carrier 1. This
Querspannvorrichtung 6 kann beispielsweise über durch den Träger 1 und die Ankerköpfe 3,4 hindurchgeführte Gewindestangen oder Dübel erfolgen.Cross-tensioning device 6 can be made, for example, via threaded rods or dowels guided through the carrier 1 and the anchor heads 3, 4.
Die aus der CFK-Lamelle 2 und den Ankerköpfen 3 , 4 gebildete Verstärkungsvorrichtung kann nun auch einfach vorgespannt werden, wie auf der rechten Seite der Figur 1 schematisch dargestellt ist . Hierfür kann beispielsweise auf der Trägerunterseite 1 ein Winkelbeschlag 7 befestigt werden, an welchen eine Spannstange 8, welche an ihrem eine Ende mit dem Ankerkopf 4 verbunden ist, angreift. Es ist vorteihaft, dass für eine Vorspannung beide Ankerköpfe 3,4 mit einer solchen Spannvorrichtung ausgerüstet werden müssen. Die Spannvorrichtung wird vor dem Aufkleben angebracht und kann nach dem Aushärten der Klebeverbindung zwischen der CFK-Lamelle 2 resp. den Ankerköpfen 3,4 und dem Träger 1 wieder entfernt werden.The reinforcement device formed from the CFRP lamella 2 and the anchor heads 3, 4 can now also be simply pretensioned, as is shown schematically on the right-hand side of FIG. For this purpose, for example, an angle fitting 7 can be attached to the underside of the support 1, to which a tension rod 8, which is connected at one end to the anchor head 4, engages. It is advantageous that both anchor heads 3, 4 must be equipped with such a tensioning device for pretensioning. The clamping device is attached before gluing and can, after the adhesive bond between the CFRP lamella 2 has hardened. the anchor heads 3, 4 and the support 1 can be removed again.
Figur 2 zeigt nun den Querschnitt durch einen der Ankerkδpfe 3. Im quaderförmigen Ankerkopf 3 sind hier vorzugsweise drei Fuhrungs- resp. Halteschlitze 9 übereinanderliegend angeordnet, welche das in drei Fahnen 2* aufgeteilte Ende der CFK-Lamelle 2, wie in Figur 3 dargestellt, aufnehmen kann. Die Halteschlitze 9 sind hier nach oben und unten keilförmig abgespreizt angeordnet und weisen querverlaufende Bohrungen 10 auf. Diese Bohrungen 10 ergeben zusätzliche Verankerungspunkte für die Klebemasse, mit welcher die Fahnen 2 ' der CFK-Lamelle 2 mit den Halteschlitzen 9 verbunden werden. Damit wird dieFigure 2 now shows the cross section through one of the anchor heads 3. In the cuboid anchor head 3 there are preferably three guide or Holding slots 9 arranged one above the other, which can accommodate the end of the CFRP lamella 2, which is divided into three flags 2 *, as shown in FIG. 3. The holding slots 9 are here arranged upwards and downwards wedge-shaped and have transverse bores 10. These holes 10 provide additional anchoring points for the adhesive, with which the flags 2 'of the CFRP lamella 2 are connected to the holding slots 9. With that the
Einleitung von Zugkräften vom Träger 1 über den Ankerkopf 3 in die CFK-Lamelle 2 zusätzlich verbessert. Der grosse Vorteil liegt allerdings in der Aufspaltung des Endes der Lamelle 2 in die Fahnen 2 ' . Diese Aufspaltung erfolgt vorzugsweise in Faserrichtung der Lamellen, und es wird damit vorteilhafterweise eine Vergrösserung der Klebefläche erreicht, ohne dass die Festigkeitseigenschaften der CFK- Lamelle 2 beeinträchtigt werden.Introduction of tensile forces from the beam 1 via the anchor head 3 into the CFRP lamella 2 additionally improved. The big advantage, however, lies in the splitting of the end of the lamella 2 into the flags 2 '. This splitting is preferably carried out in the fiber direction of the lamellae, and it is thus advantageously achieved to enlarge the adhesive surface without the strength properties of the CFRP lamellae 2 being impaired.
Im vorliegenden Beispiel mit drei Fahnen 2 ' wird die Klebefläche gegenüber einer herkömmlichen Lamelle, welche an ihrem Ende lediglich auf den Träger aufgeklebt ist, versechsfacht, gegenüber der bekannten Lösung mit keilförmiger Ausnehmung im Träger und Haftbrücken immer noch verdreifacht !In the present example with three flags 2 ', the adhesive area is tripled compared to a conventional lamella, which is only glued to the carrier at its end, and is still tripled compared to the known solution with a wedge-shaped recess in the carrier and adhesive bridges!
Um im Austrittsbereich der CFK-Lamelle 2 aus dem Ankerkopf 3 ein aufbiegen oder aufreissen der Ankerkopfes durch Querkräfte, welche aus der keil- oder bogenförmigen Anordnung der Halteschlitze 9 herrühren, zu vermeiden, ist vorzugsweise eine Querverstärkung 11 anzubringen, welche in Figur 2 nur schematisch angedeutet ist. Beispielsweise kann diese Querverεtärkung 11 mittels durch entsprechende Bohrungen im Ankerkopf 3 hindurchgeführte und über Muttern verspannte GewindeStangen erfolgen. Somit werden allfällige Schubspannungsspitzen im Austrittsbereich des Ankerkopfes 3 überdrückt und grössere Schubspannungen in dieser Zone zulässig.In order to prevent the anchor head 3 from bending or tearing open in the exit area of the CFRP lamella 2 due to transverse forces resulting from the wedge-shaped or arcuate arrangement of the holding slots 9, a transverse reinforcement 11 should preferably be attached, which is shown only schematically in FIG is indicated. For example, this transverse reinforcement 11 can be carried out by means of threaded rods which are guided through corresponding bores in the anchor head 3 and braced via nuts. Thus, any shear stress peaks in the exit area of the anchor head 3 overpressed and greater shear stresses permitted in this zone.
Weiter ist im Ankerkopf 3 beispielsweise eine Gewindebohrung 12 angebracht, in welche eine Vorspannvorrichtung eingeschraubt werden kann, wie dies schematisch in Figur 1 dargestellt ist.Furthermore, a threaded bore 12 is made in the anchor head 3, for example, into which a pretensioning device can be screwed, as is shown schematically in FIG.
Figur 3 zeigt, wie bereits erwähnt, ein Ende der CFK- Lamelle 2 mit dem in drei Fahnen 2 ' aufgespaltenen Lamellenende. Die CFK-Lamelle kann mit herkömmlichen Mitteln nach dem Ablängen auf die gewünschte Länge in die gewünschte Anzahl, in etwa gleich dicker Fahnen 2' aufgespalten werden, beispielsweise mittels eines Hobels oder Messers. Vorteilhaft dabei ist, dass an die Qualität der Aufspaltung verhältnismässig geringe Anforderungen gestellt werden, wesentlich ist die Aufteilung in die entsprechende Anzahl Fahnen 2 ' zur Erzielung der Flächenvergrösserung für die Verbindung mit dem Ankerkopf 3.As already mentioned, FIG. 3 shows one end of the CFRP lamella 2 with the lamella end split into three flags 2 '. The CFRP lamella can be split by conventional means after cutting to the desired length into the desired number, approximately equal flags 2 ', for example by means of a planer or knife. The advantage here is that the quality of the splitting is subject to relatively low requirements; the division into the corresponding number of flags 2 ′ is essential in order to achieve the increase in area for the connection to the anchor head 3.
In Figur 4 ist nun der Querschnitt durch einen Träger 1 mit an der Unterseite (Zugseite) angebrachtem, erfindungsgemässen Verstärkungsvorrichtung, bestehend aus einer CFK-Lamelle 2 mit an den Enden angebrachten Ankerköpfen 12 und 13. Die Ankerköpfe 12, 13 sind nun derart ausgebildet, dass die CFK-Lamelle 2 praktisch auf der Höhe der Kleberschicht 5 aus den Ankerköpfen 12, 13 austritt, und diese damit nicht versenkt in der Unterseite des Trägers 1 angeordnet sein müssen, sondern ebenfalls flächig auf diese Unterseite beispielsweise angeklebt werden können. Selbstverständlich können auch hier die in Figur 1 angedeuteten Querspannvorrichtungen 6 angebracht werden, um einen höheren Anpressdruck und damit eine höhere Zugfestigkeit der Verbindung zwischen den Ankerköpfen 12, 13 und der Trägerunterseite zu bewirken. Ebenfalls lassen sich diese Ankerköpfe 12, 13, wie die bereits vorgängig beschriebenen Ausfuhrungsform, einfach vorspannen.4 shows the cross section through a carrier 1 with a reinforcement device according to the invention, which is attached to the underside (tension side) and consists of a CFRP lamella 2 with anchor heads 12 and 13 attached to the ends. The anchor heads 12, 13 are now designed in such a way that that the CFRP lamella 2 practically emerges from the anchor heads 12, 13 at the level of the adhesive layer 5, and that they do not therefore have to be arranged sunk in the underside of the carrier 1, but also, for example, glued flatly to this underside can be. Of course, the transverse tensioning devices 6 indicated in FIG. 1 can also be attached here in order to bring about a higher contact pressure and thus a higher tensile strength of the connection between the anchor heads 12, 13 and the underside of the beam. These anchor heads 12, 13, like the embodiment already described above, can also be easily preloaded.
Figur 5 zeigt nun noch den Querschnitt durch einen Ankerkopf 12 und der entsprechenden Anordnung der Halteschlitze 9. Der unterste Schlitz 9' ist dabei parallel zur auf den Träger 1 aufliegenden Aussenwand 12 ' des Ankerkopfes 12 ausgebildet, die übrigen Schlitze 9 sind unter einem spitzen Winkel dazu fächerförmig gegen Aussen weisend angeordnet . Diese Anordnung bringt einerseits durch die Vergrösserung der Verklebungsoberflache der CFK-Lamelle 2 dieselben Vorteile wie bereits beschrieben, und ermöglicht andererseits das flächige Aufbringen auch der Ankerköpfe 12, 13 ohne zusätzliche Ausnehmungen am Träger 1. Auch bei diesen Ankerköpfen 12, 13 sind Querverstärkungsmittel 11, wie in Figur 2 schematisch dargestellt, zur Vermeidung des Aufbiegens oder Aufreissens der Ankerköpfe 12, 13 im Bereich des Austritts der CFK- Lamelle 2.Figure 5 now shows the cross section through an anchor head 12 and the corresponding arrangement of the holding slots 9. The bottom slot 9 'is parallel to the outer wall 12' of the anchor head 12 resting on the support 1, the remaining slots 9 are at an acute angle for this purpose arranged in a fan shape pointing towards the outside. On the one hand, this arrangement brings the same advantages as already described by enlarging the bonding surface of the CFRP lamella 2, and on the other hand enables the anchor heads 12, 13 to be applied evenly without additional recesses on the carrier 1. Also in these anchor heads 12, 13 there are transverse reinforcement means 11, as shown schematically in FIG. 2, in order to prevent the armature heads 12, 13 from bending open or tearing open in the region of the exit of the CFRP lamella 2.
Als Material für die Ankerköpfe 3,4 resp. 12, 13 eignet sich einerseits Metall, welches eine hohe Festigkeit, einfache Bearbeitbarkeit und guteAs a material for the anchor heads 3.4, respectively. 12, 13 is suitable on the one hand metal, which has high strength, easy workability and good
Krafteinleitungseigenschaften aufweist, und andererseits auch Kunststoff, insbesondere wenn die Korrosionsanforderungen hoch sein müssen. In Figur 6 ist nun die schematische Ansicht einer weiteren Ausfuhrungsform der erfindungsgemässenHas force introduction properties, and on the other hand also plastic, especially if the corrosion requirements must be high. In Figure 6 is now the schematic view of another embodiment of the invention
Verstärkungsvorrichtung dargestellt . Das Ende der CFK- Lamelle 2 ist hier in zwei übereinanderliegende Fahnen 2 ' aufgespalten, welche an die Aussenseite eines keilförmig ausgestalteten Ankerkopfes 14 zu liegen kommen. Sie können dort wiederum mit der Oberfläche des Ankerkopfes 14 durch eine Verklebung verbunden werden.Reinforcement device shown. The end of the CFRP lamella 2 is split here into two superposed flags 2 ′, which come to rest on the outside of a wedge-shaped anchor head 14. You can in turn be connected to the surface of the anchor head 14 by gluing.
In einer weiteren erfindungsgemässen Ausfuhrungsform werden die aufgespaltenen Fahnen 2 ' des Endes der CFK-Lamelle 2 in einem aus parallel übereinander angeordneten Platten 15 gebildeten Ankerkopf gehalten, wie in Figur 7 im Längsschnitt dargestellt. Hier kann vorteilhafterweise zusätzlich eine Verschraubung 16 zum gegenseitigen Anpressen der Platten 15 resp. der Fahnen 2' eingesetzt werden .In a further embodiment according to the invention, the split flags 2 'of the end of the CFRP lamella 2 are held in an anchor head formed from plates 15 arranged one above the other, as shown in longitudinal section in FIG. Here can also advantageously a screw 16 for pressing the plates 15 and 15 respectively. the flags 2 'are used.
In Figur 8 ist weiter die Aufsicht auf eine weitere Ausführungsform des Endes der CFK-Lamelle 2 dargestellt. Hier sind die Fahnen 2' nun nicht übereinander ausgebildet, sondern sind seitlich nebeneinander ausgebildet. Auch hier wird die Aufspaltung vorzugsweise entlang der Faserrichtung der CFK-Lamelle 2 vorgenommen.FIG. 8 also shows the supervision of a further embodiment of the end of the CFRP lamella 2. Here, the flags 2 'are not formed one above the other, but are formed side by side. Here too, the splitting is preferably carried out along the fiber direction of the CFRP lamella 2.
Die erfindungsgemässen Verstärkungsvorrichtungen eignen sich insbesondere für die Sanierung von bestehenden Beton- Trägerstrukturen, wie beispielsweise Decken oderThe reinforcement devices according to the invention are particularly suitable for the renovation of existing concrete support structures, such as ceilings or
Brückenträger. Allerdings können sie auch für alle bekannten Anwendungen von herkömmlichen CFK-Lamellen eingesetzt werden, wie beispielsweise Mauerwerke und Holztragwerke . Die einfache Vorspannbarkeit ermöglichen die höhere Ausnützung der Festigkeitseigenschaften der CFK- Lamellen als bei den bislang bekannten Verfahren. Zudem bewirkt die Vorspannung, dass auf der Zugseite eines bestehenden Tragelementes eine Vorpressung erfolgt, was gerade beispielsweise bei Brückenträgern vorteilhaft ist. Bridge girders. However, they can also be used for all known applications of conventional CFRP slats, such as masonry and Wooden structures. The simple prestressing enables the strength properties of the CFRP lamellas to be utilized to a greater extent than in the previously known processes. In addition, the preload causes a pre-pressing to take place on the tension side of an existing support element, which is particularly advantageous, for example, in the case of bridge girders.

Claims

Patentansprüche claims
1. Verstärkungsvorrichtung für Tragstrukturen (1) mit CFK-Lamelle (2), dadurch gekennzeichnet, dass mindestens ein Ende der CFK-Lamelle (2) in mindestens zwei Fahnen (2') aufgespaltet ist und in ein Abschlusselement (3, 4; 12, 13) mündet .1. Reinforcement device for supporting structures (1) with CFRP lamella (2), characterized in that at least one end of the CFRP lamella (2) is split into at least two flags (2 ') and into a closing element (3, 4; 12 , 13) opens out.
2. Verstärkungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass jeweils beide Enden der CFK-Lamelle (2) je in ein Abschlusselement (3, 4,-12, 13) münden.2. Reinforcement device according to claim 1, characterized in that both ends of the CFRP lamella (2) each open into a terminating element (3, 4, -12, 13).
3. Verstärkungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Fahnen (2') zumindestens teilweise in Halteschlitze (9;9T) des Abschlusselementes (3, 4,-12, 13) eingesetzt sind, welche vorzugsweise zueinander keilförmig angeordnet sind.3. Reinforcement device according to claim 1 or 2, characterized in that the flags (2 ') are at least partially used in holding slots (9; 9 T ) of the end element (3, 4, -12, 13), which are preferably arranged in a wedge shape .
4. Verstärkungsvorrichtung nach einem der Ansprüche 1 bis4. Reinforcement device according to one of claims 1 to
3, dadurch gekennzeichnet, dass die Lamellenenden (21) in übereinanderliegende, etwa gleich dicke Fahnen aufgespalten sind.3, characterized in that the lamella ends (2 1 ) are split into overlapping, approximately equally thick flags.
5. Verstärkungsvorrichtung nach einem der Ansprüche 1 bis5. Reinforcement device according to one of claims 1 to
4, dadurch gekennzeichnet, dass die Halteschlitze (9) des Abschlusselementes (3,4,12,13) eine rauhe oder gewellte Oberfläche aufweisen. 4, characterized in that the holding slots (9) of the end element (3, 4, 12, 13) have a rough or corrugated surface.
6. Verstärkungsvorrichtung nach einem der Ansprüche 1 bis6. Reinforcement device according to one of claims 1 to
5, dadurch gekennzeichnet, dass quer zur Lamellenoberfläche angeordnete Bohrungen (10) im Abschlusselement (3) im Bereich der Halteschlitze (9) angeordnet sind.5, characterized in that bores (10) arranged transversely to the lamella surface are arranged in the end element (3) in the region of the holding slots (9).
7. Verstärkungsvorrichtung nach einem der Ansprüche 1 bis7. Reinforcement device according to one of claims 1 to
6, dadurch gekennzeichnet, dass das Abschlusselement (3,4,12,13) ein Quader aus Metall oder Kunststoff ist.6, characterized in that the end element (3, 4, 12, 13) is a cuboid made of metal or plastic.
8. Verstärkungsvorrichtung nach einem der Ansprüche 1 bis8. Reinforcement device according to one of claims 1 to
7, dadurch gekennzeichnet, dass das Abschlusselement (3,4,12,13) im Bereich des Austritts der CFK-Lamelle (2) quer zur Austrittsrichtung angeordnete7, characterized in that the end element (3, 4, 12, 13) is arranged transversely to the exit direction in the area of the exit of the CFRP lamella (2)
Verstärkungsvorrichtungen (11) , vorzugsweise Gewindebolzen aufweist .Reinforcement devices (11), preferably has threaded bolts.
9. Verstärkungsvorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Abschlusselement9. Reinforcement device according to one of claims 1 to 8, characterized in that the end element
(3,4,12,13) gegenüber des Austritts der CFK-Lamelle eine Krafteinleitungsstelle, vorzugsweise eine Gewindebohrung (12) aufweist.(3, 4, 12, 13) has a force introduction point, preferably a threaded bore (12), opposite the exit of the CFRP lamella.
10. Verstärkungsvorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Halteschlitze (9) derart keilförmig im Abschlusselement (3,4,12,13) angeordnet sind, dass der unterste Halteschlitz (9') parallel zur Austrittsrichtung der Lamelle (2) angeordnet ist und die übrigen Halteschlitze (9) jeweils mit zunehmendem Winkel von der Austrittsöffnung her fächerförmig angeordnet sind. 10. Reinforcement device according to one of claims 1 to 9, characterized in that the holding slots (9) are arranged in a wedge shape in the end element (3, 4, 12, 13) such that the lowermost holding slot (9 ') is parallel to the exit direction of the lamella ( 2) is arranged and the remaining holding slots (9) are each arranged in a fan shape with increasing angle from the outlet opening.
11. Verfahren zur Verstärkung von Tragelementen (1) mit Verstärkungsvorrichtungen nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die auf die entsprechende Länge abgelängten CFK-Lamellen (2) jeweils an mindestens einem Ende in mindestens zwei in etwa gleich dicke resp. breite Fahnen (2') aufgetrennt resp. aufgespalten wird und mit einem Abschlusselement (3, 4; 12, 13) in Verbindung gebracht wird, und diese Anordnung an die Zugseite des zu verstärkenden Tragelementes (1) aufgeklebt wird.11. The method for reinforcing support elements (1) with reinforcing devices according to one of claims 1 to 10, characterized in that the CFRP slats (2) cut to the appropriate length are each at least at one end in at least two approximately the same thickness or. wide flags (2 ') separated or is split and connected to a terminating element (3, 4; 12, 13), and this arrangement is glued to the tension side of the supporting element (1) to be reinforced.
12. Verfahren nach Anspruch 11, dadurch gekennzeichnet, dass die Fahnen (2') der CFK-Lamelle (2) in separate, vorzugsweise zueinander fächerförmig angeordnete Halteschlitze (9,9') jeweils eines Abschlusselementes (3,4,12,13) eingeführt und dort verklebt resp. mit einer Klebemasse vergossen werden12. The method according to claim 11, characterized in that the flags (2 ') of the CFRP lamella (2) in separate, preferably mutually fan-shaped holding slots (9,9') each have an end element (3,4,12,13) introduced and glued there. be potted with an adhesive
13. Verfahren nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass die Enden der CFK-Lamelle (2) jeweils in drei Fahnen (2') aufgetrennt resp. aufgespalten werden und die Anordnung vor dem Verkleben mit dem Tragelement (1) gegenüber diesem selbst mittels Spannmitteln (7,8) vorgespannt wird und anschliessend in vorgespanntem Zustand auf das Tragelement (1) aufgeklebt wird.13. The method according to claim 11 or 12, characterized in that the ends of the CFRP lamella (2) each in three flags (2 ') separated or. are split and the arrangement is pretensioned with the support element (1) relative to the latter itself by means of clamping means (7, 8) and is then glued to the support element (1) in the pretensioned state.
14. Verfahren nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass die Aufspaltung der CFK-Lamelle (2) in Faserrichtung erfolgt. 14. The method according to any one of claims 11 to 13, characterized in that the CFRP lamella (2) is split in the fiber direction.
EP98937382A 1997-08-26 1998-08-18 Reinforcement device for supporting structures Expired - Lifetime EP1007809B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH198797 1997-08-26
CH198797 1997-08-26
PCT/CH1998/000346 WO1999010613A1 (en) 1997-08-26 1998-08-18 Reinforcement device for supporting structures

Publications (2)

Publication Number Publication Date
EP1007809A1 true EP1007809A1 (en) 2000-06-14
EP1007809B1 EP1007809B1 (en) 2001-10-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98937382A Expired - Lifetime EP1007809B1 (en) 1997-08-26 1998-08-18 Reinforcement device for supporting structures

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US (1) US6851232B1 (en)
EP (1) EP1007809B1 (en)
JP (1) JP4202596B2 (en)
CN (1) CN1131365C (en)
AT (1) ATE206794T1 (en)
AU (1) AU740242B2 (en)
BR (1) BR9812141A (en)
CA (1) CA2301755C (en)
DE (1) DE59801706D1 (en)
ES (1) ES2165693T3 (en)
NO (1) NO313806B1 (en)
NZ (1) NZ503251A (en)
PT (1) PT1007809E (en)
WO (1) WO1999010613A1 (en)

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Also Published As

Publication number Publication date
AU8621098A (en) 1999-03-16
WO1999010613A1 (en) 1999-03-04
CN1131365C (en) 2003-12-17
BR9812141A (en) 2000-07-18
ES2165693T3 (en) 2002-03-16
PT1007809E (en) 2002-04-29
CA2301755A1 (en) 1999-03-04
NO313806B1 (en) 2002-12-02
DE59801706D1 (en) 2001-11-15
NO20000887L (en) 2000-02-25
AU740242B2 (en) 2001-11-01
JP2001514349A (en) 2001-09-11
NO20000887D0 (en) 2000-02-23
EP1007809B1 (en) 2001-10-10
US6851232B1 (en) 2005-02-08
ATE206794T1 (en) 2001-10-15
CN1268205A (en) 2000-09-27
JP4202596B2 (en) 2008-12-24
CA2301755C (en) 2007-11-13
NZ503251A (en) 2001-07-27

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