EP2083133A2 - Mechanical end anchor element for reinforcement laminates on structures - Google Patents
Mechanical end anchor element for reinforcement laminates on structures Download PDFInfo
- Publication number
- EP2083133A2 EP2083133A2 EP09151194A EP09151194A EP2083133A2 EP 2083133 A2 EP2083133 A2 EP 2083133A2 EP 09151194 A EP09151194 A EP 09151194A EP 09151194 A EP09151194 A EP 09151194A EP 2083133 A2 EP2083133 A2 EP 2083133A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- base plate
- laminate
- fiber composite
- clamping
- anchoring element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
- E04G2023/0262—Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off
Definitions
- an end anchoring element for adhering fiber composite laminate strips consisting of a base plate which forms a support surface, which, viewed in the direction of the anchored end of a laminate strip in the direction of an angle W between 85 ° and 120 °, and has a curved surface for the laminate end region to be adhered, so that the one on it adhered end portion of the laminate end undergoes a bending directed against the structure B that the underside of the base plate has transverse grooves, and the clamping plate to be placed on the base plate has a curved surface matching the curved surface as the bottom, and the clamping plate at its end with a downwards directed projection the base plate at the end engages behind, as well as that the clamping and base plate are clamped together by means of screw, and at least by means of a both plates penetrating anchoring bolts in the building B are anchored.
- the end anchoring element for fiber composite laminate strips to be adhered consists of a base plate 1 and an associated clamping plate 8 to be placed thereon, as in FIG FIG. 1 shown. These parts are made of aluminum, for example. They can be produced by injection molding, or extruded or milled from solid material.
- the base plate 1 forms a support surface 2, which, viewed in the direction of the end of a laminate strip 3 to be anchored, encloses an angle W between 85 ° and 120 °.
- the base plate 1 has a curved surface 4 for the laminate end region to be bonded, so that the end region 5 of the laminate end glued onto it experiences a curvature 6 directed towards the building B, that is to say the end of the lamian end is closer to the building than the beginning of the laminate end region.
- transverse grooves 7 are formed, which are intended to receive the screw heads 15 of screws which penetrate the base plate 1 vertically upwards and protrude upwards from the base plate 1.
- One side of the screw head 15 rests against the lateral wall 16 of the groove 7, so that the screw head 15 is secured therein against rotation.
- the clamping plate 8 to be placed on the base plate 1 has a curved surface 9, which is suitable for the curved surface 4, as the underside 10.
- the clamping plate 8 runs at its end in a downwardly directed projection 11, which engages behind the same at the end when placed on the base plate 1.
- the clamping 8 and base plate 1 are clamped together by means of screw 12 and thus clamped.
- the base plate 1 in the building B can be anchored.
- FIG. 2 shows the end anchoring element seen from above. It is here on the top of the clamping plate 8. This is screwed by means of lock nuts 17 on the connecting screws 12 and by placing spacers 18 with the same, so that the clamping plate 8 is tightly clamped to the underlying base plate 1 and these two plates 1.8 vigorously trapped with the inclusion of the intermediate end portion of a laminate strip 3 with each other. As can be seen, the screws are arranged on both sides of the end region of the laminate strip, so that a strong tension is made possible. Because the clamping surfaces are indeed curved in one direction, the base plate 1 and the clamping plate 8 in the transverse direction are particularly stiff and the screws on the two sides of the LamiantstMails push the clamping surfaces to get rich each other.
- the grooves 7 can be seen, which are formed in the underside of the base plate 1.
- the screw heads 15 which abut each with one side on the groove side wall 16 so that they are secured in the grooves from twisting. Because the recess into which the base plate 1 is inserted, previously filled with an epoxy resin, the grooves 7 are filled when inserting the base plate 1 of this epoxy hard, so that an additional clawing of the base plate 1 is formed with the building.
- the recess is first poured with epoxy resin, then the base plate 1 is inserted, so that its support surface 2 fed to the local wall of the Depression is present. Then, the base plate 1 is secured with the anchoring bolt 13. The epoxy resin is displaced and fills out the grooves 7 on the underside of the base plate 1. Then the curved upper surface of the base plate 1 is coated with epoxy resin and then the end-side portion of the laminate strip is pressed under curvature. The upper surface of the laminate strip is also coated with epoxy resin, and then the clamping plate 8 is put on and firmly clamped to the base plate 1, pinching the intermediate end portion of the laminate strip.
- the novelty and special in the application of this Endverank fürsenses is that it allows the glued fiber composite material F additionally in the end in the support base, consisting mainly of concrete or reinforced concrete, closelybiegen.
- the fiber composite material F which is glued to Biegezugverstärkung on the surface of the component B, preferably consists of unidirectionally arranged fiber bundles, preferably of carbon, glass or aramid fibers.
- This fiber composite material F is glued over the entire length of the fiber composite material with the base shear resistant by means of adhesive.
- One or both ends of the fiber composite are then glued between the lower base plate and the upper clamping plate as described.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Abstract
Description
Die Verstärkung eines bestehenden Bauteils B aus Beton respektive Stahlbeton mit einem Faserverbundwerkstoff F, um eine auf Biegezug beanspruchte Seite des Bauteils B zu verstärken, ist bekannt. Hierzu wird ein Faserverbundwerkstoff F auf die beanspruchte Stelle aufgeklebt. Es ist ebenfalls Stand der Technik, dass ein zusätzlicher Anpressdruck, welcher am Ende des geklebten Faserverbundwerkstoffes F aufgebracht wird, beispielsweise mit Stahlplatten und Schrauben, welche in den Traggrund eingreifen, sich positiv auf das Verhalten des mit einem Faserverbundwerkstoff verstärkten Bauteils auswirkt.The reinforcement of an existing component B made of concrete or reinforced concrete with a fiber composite material F in order to strengthen a claimed on bending tension side of the component B is known. For this purpose, a fiber composite material F is glued to the claimed point. It is also known in the art that an additional contact pressure, which is applied to the end of the bonded fiber composite material F, for example with steel plates and screws, which engage in the support base, has a positive effect on the behavior of the fiber composite reinforced component.
Trotzdem bleibt das Verankern eines Faserverbundstreifens an seinen Enden eine Schwachstelle. Es ist daher die Aufgabe dieser Erfindung, ein mechanisches Endverankerungselement für solche Laminatstreifen zu schaffen, welches grössere Kräfte aufzunehmen vermag und das kostengünstig hergestellt und einfach verbaut werden kann.Nevertheless, anchoring a fiber composite strip at its ends remains a weak spot. It is therefore the object of this invention to provide a mechanical end anchoring element for such laminate strips, which is able to absorb greater forces and which can be produced inexpensively and easily installed.
Diese Aufgabe wird gelöst von einem Endverankerungselement für aufzuklebende Faserverbundwerkstoff-Laminatstreifen, bestehend aus einer Grundplatte, welche eine Stützfläche bildet, die mit der Richtung des zu verankernden Endes eines Laminatstreifens in dessen Richtung hin gesehen einen Winkel W zwischen 85° und 120° einschliesst, und für den aufzuklebenden Laminatendbereich eine gekrümmte Oberfläche aufweist, sodass der darauf aufgeklebte Endbereich des Laminatendes eine gegen das Bauwerk B hin gerichtete Krümmung erfährt, dass die Unterseite der Grundplatte Quernuten aufweist, und die auf die Grundplatte aufzulegende Klemmplatte eine zur gekrümmten Oberfläche passende gekrümmte Oberfläche als Unterseite aufweist, und die Klemmplatte an ihrem Ende mit einer nach unten gerichteten Auskragung die Grundplatte an deren Ende hintergreift, sowie dass die Klemm- und Grundplatte mittels Schraubverbindungen miteinander verklemmbar sind, und wenigstens mittels eines die beide Platten durchdringenden Verankerungsbolzen im Bauwerk B verankerbar sind.This object is achieved by an end anchoring element for adhering fiber composite laminate strips, consisting of a base plate which forms a support surface, which, viewed in the direction of the anchored end of a laminate strip in the direction of an angle W between 85 ° and 120 °, and has a curved surface for the laminate end region to be adhered, so that the one on it adhered end portion of the laminate end undergoes a bending directed against the structure B that the underside of the base plate has transverse grooves, and the clamping plate to be placed on the base plate has a curved surface matching the curved surface as the bottom, and the clamping plate at its end with a downwards directed projection the base plate at the end engages behind, as well as that the clamping and base plate are clamped together by means of screw, and at least by means of a both plates penetrating anchoring bolts in the building B are anchored.
In den Figuren ist das Endverankerungselement für aufzuklebende Faserverbundwerkstoff-Laminatstreifen gezeigt und seine Form und Beschaffenheit sowie seine Funktion wird nachfolgend anhand dieser Zeichnungen beschrieben und erklärt.In the figures, the end anchoring element for fiber composite laminate strips to be bonded is shown, and its shape, nature and function will be described and explained below with reference to these drawings.
Es zeigt:
- Figur 1:
- Das Endverankerungselement von der Seite her gesehen, mit einem rechts einlaufenden Faserverbundwerkstoff-Laminatstreifen;
- Figur 2:
- Das Endverankerungselement von oben gesehen;
- Figur 3:
- Das Endverankerungselement von unten gesehen;
- Figur 4:
- Das Endverankerungselement in einem Längsschnitt in einer an einem Bauwerk B verbauten Lage mit eingeklemmtem Faserverbundwerkstoff-Laminatstreifen.
- FIG. 1:
- The end anchoring element seen from the side, with a right incoming fiber composite laminate strips;
- FIG. 2:
- The end anchoring element seen from above;
- FIG. 3:
- The end anchoring element seen from below;
- FIG. 4:
- The end anchoring element in a longitudinal section in a built-up on a building B layer with clamped fiber composite laminate strips.
Das Endverankerungselement für aufzuklebende Faserverbundwerkstoff-Laminatstreifen besteht aus einer Grundplatte 1 und einer darauf aufzulegenden zugehörigen Klemmplatte 8, wie in
Die
In
Die
Das Neue und Besondere bei der Anwendung dieses Endverankerungselementes besteht darin, das es ermöglicht, den aufgeklebten Faserverbundwerkstoff F zusätzlich am Ende in den Traggrund, bestehend vorwiegend aus Beton respektive Stahlbeton, einzubiegen. Der Faserverbundwerkstoff F, welcher zur Biegezugverstärkung auf die Oberfläche des Bauteils B aufgeklebt wird, besteht vorzugsweise aus unidirektional angeordneten Faserbündeln, vorzugsweise aus Kohle-, Glas- oder Aramidfasern. Dieser Faserverbundwerkstoff F wird über die gesamte Länge des Faserverbundwerkstoffes mit dem Traggrund schubfest mittels Klebstoff verklebt. Ein oder beide Enden des Faserverbundwerkstoffes werden danach wie beschrieben zwischen der unteren Grundplatte und der oberen Klemmplatte eingeklebt. Durch Anziehen der Schraubverbindungen zwischen der Klemm- 8 und Grundplatte 1 wird der Faserverbundbaustoffstreifen gekrümmt und in den Traggrund eingebogen. Bei Belastung des Bauteils B entsteht im Faserverbundwerkstoff, welcher auf der biegebeanspruchten Seite aufgeklebt wird, eine Zugkraft. Am gekrümmten Ende des Faserverbundwerkstoffes wird die verbleibende Zugkraft, welche durch die Klebeverbindung teilweise bereits in den Traggrund eingeleitet wurde, umgelenkt. Die resultierende Umlenkkraft U wird in einem spitzen Winkel über die Stützfläche 2, welche dann als Krafteinleitungsfläche wirkt, in den Traggrund abgegeben. Dank dieser Endverankerungselemente ist die Krafteinleitung aus dem Faserverbundwerkstoff F in den Traggrund nicht ausschliesslich vom Kleberverbund über die gesamte Länge des Faserverbundwerkstoffes abhängig. Die Krafteinleitung erfolgt zusätzlich über die resultierende Umlenkkraft U. Damit das Abheben des Verankerungselements infolge der Umlenkkraft U verhindert wird, wird das Verankerungselement mit einem Verankerungsbolzen 13 im Traggrund B fixiert.The novelty and special in the application of this Endverankerungselementes is that it allows the glued fiber composite material F additionally in the end in the support base, consisting mainly of concrete or reinforced concrete, einzubiegen. The fiber composite material F, which is glued to Biegezugverstärkung on the surface of the component B, preferably consists of unidirectionally arranged fiber bundles, preferably of carbon, glass or aramid fibers. This fiber composite material F is glued over the entire length of the fiber composite material with the base shear resistant by means of adhesive. One or both ends of the fiber composite are then glued between the lower base plate and the upper clamping plate as described. By tightening the screw between the clamping 8 and
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00117/08A CH700733B1 (en) | 2008-01-28 | 2008-01-28 | Mechanical Endverankerungselement for reinforcing laminates to structures. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2083133A2 true EP2083133A2 (en) | 2009-07-29 |
EP2083133A3 EP2083133A3 (en) | 2013-03-20 |
Family
ID=40600291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09151194A Withdrawn EP2083133A3 (en) | 2008-01-28 | 2009-01-23 | Mechanical end anchor element for reinforcement laminates on structures |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2083133A3 (en) |
CH (1) | CH700733B1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016005941A1 (en) | 2014-07-09 | 2016-01-14 | Faculdade De Ciências E Tecnologia Da Universidade Nova De Lisboa | Structural strengthening system with internally anchored reinforcements by adherence |
GB2568537A (en) * | 2017-11-20 | 2019-05-22 | Ahmed Abubaker Kiari Mohamed | Support for a structure |
WO2020234341A1 (en) * | 2019-05-23 | 2020-11-26 | Soletanche Freyssinet | Method for reinforcing a structure |
EP4071321A1 (en) * | 2021-04-07 | 2022-10-12 | Vilniaus Gedimino technikos universitetas | Device and method for reinforcing structures with pre-stressed fibre-reinforced-polymer laminates |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1033455A1 (en) * | 1999-03-01 | 2000-09-06 | Freyssinet International Stup | Method and device for reinforcing a concrete structure |
DE102004044386A1 (en) * | 2004-09-12 | 2006-03-30 | Schere, Josef | Connecting construction for attachment of tie beams to anchoring regions of structures has curved anchoring section of tie beam with progression sinking increasingly into cross section of structure anchoring region |
-
2008
- 2008-01-28 CH CH00117/08A patent/CH700733B1/en not_active IP Right Cessation
-
2009
- 2009-01-23 EP EP09151194A patent/EP2083133A3/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1033455A1 (en) * | 1999-03-01 | 2000-09-06 | Freyssinet International Stup | Method and device for reinforcing a concrete structure |
DE102004044386A1 (en) * | 2004-09-12 | 2006-03-30 | Schere, Josef | Connecting construction for attachment of tie beams to anchoring regions of structures has curved anchoring section of tie beam with progression sinking increasingly into cross section of structure anchoring region |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016005941A1 (en) | 2014-07-09 | 2016-01-14 | Faculdade De Ciências E Tecnologia Da Universidade Nova De Lisboa | Structural strengthening system with internally anchored reinforcements by adherence |
GB2568537A (en) * | 2017-11-20 | 2019-05-22 | Ahmed Abubaker Kiari Mohamed | Support for a structure |
GB2568537B (en) * | 2017-11-20 | 2020-07-29 | Ahmed Abubaker Kiari Mohamed | Support for a structure |
WO2020234341A1 (en) * | 2019-05-23 | 2020-11-26 | Soletanche Freyssinet | Method for reinforcing a structure |
FR3096382A1 (en) * | 2019-05-23 | 2020-11-27 | Soletanche Freyssinet | Method of strengthening a structure. |
EP4071321A1 (en) * | 2021-04-07 | 2022-10-12 | Vilniaus Gedimino technikos universitetas | Device and method for reinforcing structures with pre-stressed fibre-reinforced-polymer laminates |
Also Published As
Publication number | Publication date |
---|---|
CH700733B1 (en) | 2010-10-15 |
EP2083133A3 (en) | 2013-03-20 |
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